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cebix |
1.1 |
/* |
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* VIC_SC.cpp - 6569R5 emulation (cycle based) |
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* |
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cebix |
1.6 |
* Frodo Copyright (C) Christian Bauer |
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cebix |
1.1 |
* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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/* |
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* Incompatibilities: |
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* ------------------ |
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* |
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* - Color of $ff bytes read when BA is low and AEC is high |
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* is not correct |
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* - Changes to border/background color are visible 7 pixels |
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* too late |
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* - Sprite data access doesn't respect BA |
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* - Sprite collisions are only detected within the visible |
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* screen area (excluding borders) |
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* - Sprites are only drawn if they completely fit within the |
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* left/right limits of the chunky bitmap |
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*/ |
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#include "sysdeps.h" |
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#include "VIC.h" |
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#include "C64.h" |
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#include "CPUC64.h" |
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#include "Display.h" |
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#include "Prefs.h" |
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// First and last displayed line |
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const int FIRST_DISP_LINE = 0x10; |
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const int LAST_DISP_LINE = 0x11f; |
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// First and last possible line for Bad Lines |
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const int FIRST_DMA_LINE = 0x30; |
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const int LAST_DMA_LINE = 0xf7; |
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// Display window coordinates |
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const int ROW25_YSTART = 0x33; |
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const int ROW25_YSTOP = 0xfb; |
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const int ROW24_YSTART = 0x37; |
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const int ROW24_YSTOP = 0xf7; |
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#if defined(SMALL_DISPLAY) |
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/* This does not work yet, the sprite code doesn't know about it. */ |
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const int COL40_XSTART = 0x14; |
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const int COL40_XSTOP = 0x154; |
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const int COL38_XSTART = 0x1B; |
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const int COL38_XSTOP = 0x14B; |
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#else |
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const int COL40_XSTART = 0x20; |
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const int COL40_XSTOP = 0x160; |
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const int COL38_XSTART = 0x27; |
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const int COL38_XSTOP = 0x157; |
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#endif |
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// Tables for sprite X expansion |
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uint16 ExpTable[256] = { |
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0x0000, 0x0003, 0x000C, 0x000F, 0x0030, 0x0033, 0x003C, 0x003F, |
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0x00C0, 0x00C3, 0x00CC, 0x00CF, 0x00F0, 0x00F3, 0x00FC, 0x00FF, |
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0x0300, 0x0303, 0x030C, 0x030F, 0x0330, 0x0333, 0x033C, 0x033F, |
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0x03C0, 0x03C3, 0x03CC, 0x03CF, 0x03F0, 0x03F3, 0x03FC, 0x03FF, |
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0x0C00, 0x0C03, 0x0C0C, 0x0C0F, 0x0C30, 0x0C33, 0x0C3C, 0x0C3F, |
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0x0CC0, 0x0CC3, 0x0CCC, 0x0CCF, 0x0CF0, 0x0CF3, 0x0CFC, 0x0CFF, |
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0x0F00, 0x0F03, 0x0F0C, 0x0F0F, 0x0F30, 0x0F33, 0x0F3C, 0x0F3F, |
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0x0FC0, 0x0FC3, 0x0FCC, 0x0FCF, 0x0FF0, 0x0FF3, 0x0FFC, 0x0FFF, |
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0x3000, 0x3003, 0x300C, 0x300F, 0x3030, 0x3033, 0x303C, 0x303F, |
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0x30C0, 0x30C3, 0x30CC, 0x30CF, 0x30F0, 0x30F3, 0x30FC, 0x30FF, |
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0x3300, 0x3303, 0x330C, 0x330F, 0x3330, 0x3333, 0x333C, 0x333F, |
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0x33C0, 0x33C3, 0x33CC, 0x33CF, 0x33F0, 0x33F3, 0x33FC, 0x33FF, |
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0x3C00, 0x3C03, 0x3C0C, 0x3C0F, 0x3C30, 0x3C33, 0x3C3C, 0x3C3F, |
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0x3CC0, 0x3CC3, 0x3CCC, 0x3CCF, 0x3CF0, 0x3CF3, 0x3CFC, 0x3CFF, |
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0x3F00, 0x3F03, 0x3F0C, 0x3F0F, 0x3F30, 0x3F33, 0x3F3C, 0x3F3F, |
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0x3FC0, 0x3FC3, 0x3FCC, 0x3FCF, 0x3FF0, 0x3FF3, 0x3FFC, 0x3FFF, |
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0xC000, 0xC003, 0xC00C, 0xC00F, 0xC030, 0xC033, 0xC03C, 0xC03F, |
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0xC0C0, 0xC0C3, 0xC0CC, 0xC0CF, 0xC0F0, 0xC0F3, 0xC0FC, 0xC0FF, |
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0xC300, 0xC303, 0xC30C, 0xC30F, 0xC330, 0xC333, 0xC33C, 0xC33F, |
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0xC3C0, 0xC3C3, 0xC3CC, 0xC3CF, 0xC3F0, 0xC3F3, 0xC3FC, 0xC3FF, |
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0xCC00, 0xCC03, 0xCC0C, 0xCC0F, 0xCC30, 0xCC33, 0xCC3C, 0xCC3F, |
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0xCCC0, 0xCCC3, 0xCCCC, 0xCCCF, 0xCCF0, 0xCCF3, 0xCCFC, 0xCCFF, |
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0xCF00, 0xCF03, 0xCF0C, 0xCF0F, 0xCF30, 0xCF33, 0xCF3C, 0xCF3F, |
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0xCFC0, 0xCFC3, 0xCFCC, 0xCFCF, 0xCFF0, 0xCFF3, 0xCFFC, 0xCFFF, |
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0xF000, 0xF003, 0xF00C, 0xF00F, 0xF030, 0xF033, 0xF03C, 0xF03F, |
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0xF0C0, 0xF0C3, 0xF0CC, 0xF0CF, 0xF0F0, 0xF0F3, 0xF0FC, 0xF0FF, |
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0xF300, 0xF303, 0xF30C, 0xF30F, 0xF330, 0xF333, 0xF33C, 0xF33F, |
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0xF3C0, 0xF3C3, 0xF3CC, 0xF3CF, 0xF3F0, 0xF3F3, 0xF3FC, 0xF3FF, |
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0xFC00, 0xFC03, 0xFC0C, 0xFC0F, 0xFC30, 0xFC33, 0xFC3C, 0xFC3F, |
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0xFCC0, 0xFCC3, 0xFCCC, 0xFCCF, 0xFCF0, 0xFCF3, 0xFCFC, 0xFCFF, |
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0xFF00, 0xFF03, 0xFF0C, 0xFF0F, 0xFF30, 0xFF33, 0xFF3C, 0xFF3F, |
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0xFFC0, 0xFFC3, 0xFFCC, 0xFFCF, 0xFFF0, 0xFFF3, 0xFFFC, 0xFFFF |
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}; |
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uint16 MultiExpTable[256] = { |
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0x0000, 0x0005, 0x000A, 0x000F, 0x0050, 0x0055, 0x005A, 0x005F, |
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0x00A0, 0x00A5, 0x00AA, 0x00AF, 0x00F0, 0x00F5, 0x00FA, 0x00FF, |
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0x0500, 0x0505, 0x050A, 0x050F, 0x0550, 0x0555, 0x055A, 0x055F, |
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0x05A0, 0x05A5, 0x05AA, 0x05AF, 0x05F0, 0x05F5, 0x05FA, 0x05FF, |
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0x0A00, 0x0A05, 0x0A0A, 0x0A0F, 0x0A50, 0x0A55, 0x0A5A, 0x0A5F, |
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0x0AA0, 0x0AA5, 0x0AAA, 0x0AAF, 0x0AF0, 0x0AF5, 0x0AFA, 0x0AFF, |
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0x0F00, 0x0F05, 0x0F0A, 0x0F0F, 0x0F50, 0x0F55, 0x0F5A, 0x0F5F, |
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0x0FA0, 0x0FA5, 0x0FAA, 0x0FAF, 0x0FF0, 0x0FF5, 0x0FFA, 0x0FFF, |
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0x5000, 0x5005, 0x500A, 0x500F, 0x5050, 0x5055, 0x505A, 0x505F, |
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0x50A0, 0x50A5, 0x50AA, 0x50AF, 0x50F0, 0x50F5, 0x50FA, 0x50FF, |
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0x5500, 0x5505, 0x550A, 0x550F, 0x5550, 0x5555, 0x555A, 0x555F, |
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0x55A0, 0x55A5, 0x55AA, 0x55AF, 0x55F0, 0x55F5, 0x55FA, 0x55FF, |
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0x5A00, 0x5A05, 0x5A0A, 0x5A0F, 0x5A50, 0x5A55, 0x5A5A, 0x5A5F, |
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0x5AA0, 0x5AA5, 0x5AAA, 0x5AAF, 0x5AF0, 0x5AF5, 0x5AFA, 0x5AFF, |
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0x5F00, 0x5F05, 0x5F0A, 0x5F0F, 0x5F50, 0x5F55, 0x5F5A, 0x5F5F, |
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0x5FA0, 0x5FA5, 0x5FAA, 0x5FAF, 0x5FF0, 0x5FF5, 0x5FFA, 0x5FFF, |
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0xA000, 0xA005, 0xA00A, 0xA00F, 0xA050, 0xA055, 0xA05A, 0xA05F, |
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0xA0A0, 0xA0A5, 0xA0AA, 0xA0AF, 0xA0F0, 0xA0F5, 0xA0FA, 0xA0FF, |
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0xA500, 0xA505, 0xA50A, 0xA50F, 0xA550, 0xA555, 0xA55A, 0xA55F, |
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0xA5A0, 0xA5A5, 0xA5AA, 0xA5AF, 0xA5F0, 0xA5F5, 0xA5FA, 0xA5FF, |
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0xAA00, 0xAA05, 0xAA0A, 0xAA0F, 0xAA50, 0xAA55, 0xAA5A, 0xAA5F, |
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0xAAA0, 0xAAA5, 0xAAAA, 0xAAAF, 0xAAF0, 0xAAF5, 0xAAFA, 0xAAFF, |
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0xAF00, 0xAF05, 0xAF0A, 0xAF0F, 0xAF50, 0xAF55, 0xAF5A, 0xAF5F, |
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0xAFA0, 0xAFA5, 0xAFAA, 0xAFAF, 0xAFF0, 0xAFF5, 0xAFFA, 0xAFFF, |
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0xF000, 0xF005, 0xF00A, 0xF00F, 0xF050, 0xF055, 0xF05A, 0xF05F, |
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0xF0A0, 0xF0A5, 0xF0AA, 0xF0AF, 0xF0F0, 0xF0F5, 0xF0FA, 0xF0FF, |
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0xF500, 0xF505, 0xF50A, 0xF50F, 0xF550, 0xF555, 0xF55A, 0xF55F, |
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0xF5A0, 0xF5A5, 0xF5AA, 0xF5AF, 0xF5F0, 0xF5F5, 0xF5FA, 0xF5FF, |
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0xFA00, 0xFA05, 0xFA0A, 0xFA0F, 0xFA50, 0xFA55, 0xFA5A, 0xFA5F, |
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0xFAA0, 0xFAA5, 0xFAAA, 0xFAAF, 0xFAF0, 0xFAF5, 0xFAFA, 0xFAFF, |
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0xFF00, 0xFF05, 0xFF0A, 0xFF0F, 0xFF50, 0xFF55, 0xFF5A, 0xFF5F, |
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0xFFA0, 0xFFA5, 0xFFAA, 0xFFAF, 0xFFF0, 0xFFF5, 0xFFFA, 0xFFFF |
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}; |
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#ifdef GLOBAL_VARS |
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static uint16 mx[8]; // VIC registers |
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static uint8 my[8]; |
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static uint8 mx8; |
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static uint8 ctrl1, ctrl2; |
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static uint8 lpx, lpy; |
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static uint8 me, mxe, mye, mdp, mmc; |
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static uint8 vbase; |
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static uint8 irq_flag, irq_mask; |
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static uint8 clx_spr, clx_bgr; |
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static uint8 ec, b0c, b1c, b2c, b3c, mm0, mm1; |
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static uint8 sc[8]; |
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static uint8 *ram, *char_rom, *color_ram; // Pointers to RAM and ROM |
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static C64 *the_c64; // Pointer to C64 |
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static C64Display *the_display; // Pointer to C64Display |
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static MOS6510 *the_cpu; // Pointer to 6510 |
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static MOS6569 *the_vic; // Pointer to self |
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static uint8 colors[256]; // Indices of the 16 C64 colors (16 times mirrored to avoid "& 0x0f") |
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static uint8 ec_color, b0c_color, b1c_color, b2c_color, b3c_color; // Indices for exterior/background colors |
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static uint8 mm0_color, mm1_color; // Indices for MOB multicolors |
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static uint8 spr_color[8]; // Indices for MOB colors |
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static uint8 matrix_line[40]; // Buffer for video line, read in Bad Lines |
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static uint8 color_line[40]; // Buffer for color line, read in Bad Lines |
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#ifdef __POWERPC__ |
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static double chunky_tmp[DISPLAY_X/8]; // Temporary line buffer for GameKit speedup |
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#endif |
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static uint8 *chunky_ptr; // Pointer in chunky bitmap buffer |
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static uint8 *chunky_line_start; // Pointer to start of current line in bitmap buffer |
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static uint8 *fore_mask_ptr; // Pointer in fore_mask_buf |
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static int xmod; // Number of bytes per row |
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static uint16 raster_x; // Current raster x position |
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static uint16 raster_y; // Current raster line |
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static uint16 irq_raster; // Interrupt raster line |
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static uint16 dy_start; // Comparison values for border logic |
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static uint16 dy_stop; |
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static uint16 rc; // Row counter |
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static uint16 vc; // Video counter |
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static uint16 vc_base; // Video counter base |
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static uint16 x_scroll; // X scroll value |
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static uint16 y_scroll; // Y scroll value |
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static uint16 cia_vabase; // CIA VA14/15 video base |
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static int cycle; // Current cycle in line (1..63) |
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static int display_idx; // Index of current display mode |
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static int ml_index; // Index in matrix/color_line[] |
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static int skip_counter; // Counter for frame-skipping |
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static uint16 mc[8]; // Sprite data counters |
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static uint16 mc_base[8]; // Sprite data counter bases |
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static uint8 spr_coll_buf[0x180]; // Buffer for sprite-sprite collisions and priorities |
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static uint8 fore_mask_buf[0x180/8]; // Foreground mask for sprite-graphics collisions and priorities |
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static bool display_state; // true: Display state, false: Idle state |
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static bool border_on; // Flag: Upper/lower border on |
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static bool frame_skipped; // Flag: Frame is being skipped |
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static bool bad_lines_enabled; // Flag: Bad Lines enabled for this frame |
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static bool lp_triggered; // Flag: Lightpen was triggered in this frame |
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static bool is_bad_line; // Flag: Current line is Bad Line |
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static bool draw_this_line; // Flag: This line is drawn on the screen |
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static bool ud_border_on; // Flag: Upper/lower border on |
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static bool vblanking; // Flag: VBlank in next cycle |
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static bool border_on_sample[5]; // Samples of border state at different cycles (1, 17, 18, 56, 57) |
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static uint8 border_color_sample[DISPLAY_X/8]; // Samples of border color at each "displayed" cycle |
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static uint16 matrix_base; // Video matrix base |
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static uint16 char_base; // Character generator base |
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static uint16 bitmap_base; // Bitmap base |
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static uint8 ref_cnt; // Refresh counter |
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static uint8 spr_exp_y; // 8 sprite y expansion flipflops |
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static uint8 spr_dma_on; // 8 flags: Sprite DMA active |
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static uint8 spr_disp_on; // 8 flags: Sprite display active |
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static uint8 spr_draw; // 8 flags: Draw sprite in this line |
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static uint16 spr_ptr[8]; // Sprite data pointers |
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static uint8 gfx_data, char_data, color_data, last_char_data; |
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static uint8 spr_data[8][4]; // Sprite data read |
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static uint8 spr_draw_data[8][4]; // Sprite data for drawing |
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static uint32 first_ba_cycle; // Cycle when BA first went low |
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#endif |
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/* |
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* Constructor: Initialize variables |
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*/ |
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MOS6569::MOS6569(C64 *c64, C64Display *disp, MOS6510 *CPU, uint8 *RAM, uint8 *Char, uint8 *Color) |
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#ifndef GLOBAL_VARS |
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: ram(RAM), char_rom(Char), color_ram(Color), the_c64(c64), the_display(disp), the_cpu(CPU) |
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#endif |
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{ |
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int i; |
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// Set pointers |
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#ifdef GLOBAL_VARS |
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the_vic = this; |
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the_c64 = c64; |
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the_display = disp; |
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the_cpu = CPU; |
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ram = RAM; |
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|
|
char_rom = Char; |
| 255 |
|
|
color_ram = Color; |
| 256 |
|
|
#endif |
| 257 |
|
|
matrix_base = 0; |
| 258 |
|
|
char_base = 0; |
| 259 |
|
|
bitmap_base = 0; |
| 260 |
|
|
|
| 261 |
|
|
// Get bitmap info |
| 262 |
|
|
chunky_ptr = chunky_line_start = disp->BitmapBase(); |
| 263 |
|
|
xmod = disp->BitmapXMod(); |
| 264 |
|
|
|
| 265 |
|
|
// Initialize VIC registers |
| 266 |
|
|
mx8 = 0; |
| 267 |
|
|
ctrl1 = ctrl2 = 0; |
| 268 |
|
|
lpx = lpy = 0; |
| 269 |
|
|
me = mxe = mye = mdp = mmc = 0; |
| 270 |
|
|
vbase = irq_flag = irq_mask = 0; |
| 271 |
|
|
clx_spr = clx_bgr = 0; |
| 272 |
|
|
cia_vabase = 0; |
| 273 |
|
|
ec = b0c = b1c = b2c = b3c = mm0 = mm1 = 0; |
| 274 |
|
|
for (i=0; i<8; i++) mx[i] = my[i] = sc[i] = 0; |
| 275 |
|
|
|
| 276 |
|
|
// Initialize other variables |
| 277 |
|
|
raster_y = TOTAL_RASTERS - 1; |
| 278 |
|
|
rc = 7; |
| 279 |
|
|
irq_raster = vc = vc_base = x_scroll = y_scroll = 0; |
| 280 |
|
|
dy_start = ROW24_YSTART; |
| 281 |
|
|
dy_stop = ROW24_YSTOP; |
| 282 |
|
|
ml_index = 0; |
| 283 |
|
|
|
| 284 |
|
|
cycle = 1; |
| 285 |
|
|
display_idx = 0; |
| 286 |
|
|
display_state = false; |
| 287 |
|
|
border_on = ud_border_on = vblanking = false; |
| 288 |
|
|
lp_triggered = draw_this_line = false; |
| 289 |
cebix |
1.6 |
is_bad_line = false; |
| 290 |
cebix |
1.1 |
|
| 291 |
cebix |
1.6 |
spr_exp_y = spr_dma_on = spr_disp_on = 0; |
| 292 |
cebix |
1.1 |
for (i=0; i<8; i++) { |
| 293 |
|
|
mc[i] = 63; |
| 294 |
cebix |
1.6 |
mc_base[i] = 0; |
| 295 |
cebix |
1.1 |
spr_ptr[i] = 0; |
| 296 |
|
|
} |
| 297 |
|
|
|
| 298 |
|
|
frame_skipped = false; |
| 299 |
|
|
skip_counter = 1; |
| 300 |
|
|
|
| 301 |
|
|
memset(spr_coll_buf, 0, 0x180); |
| 302 |
|
|
memset(fore_mask_buf, 0, 0x180/8); |
| 303 |
|
|
|
| 304 |
|
|
// Preset colors to black |
| 305 |
|
|
disp->InitColors(colors); |
| 306 |
|
|
ec_color = b0c_color = b1c_color = b2c_color = b3c_color = mm0_color = mm1_color = colors[0]; |
| 307 |
|
|
for (i=0; i<8; i++) spr_color[i] = colors[0]; |
| 308 |
|
|
} |
| 309 |
|
|
|
| 310 |
|
|
|
| 311 |
|
|
/* |
| 312 |
|
|
* Reinitialize the colors table for when the palette has changed |
| 313 |
|
|
*/ |
| 314 |
|
|
|
| 315 |
|
|
void MOS6569::ReInitColors(void) |
| 316 |
|
|
{ |
| 317 |
|
|
int i; |
| 318 |
|
|
|
| 319 |
|
|
// Build inverse color table. |
| 320 |
|
|
uint8 xlate_colors[256]; |
| 321 |
|
|
memset(xlate_colors, 0, sizeof(xlate_colors)); |
| 322 |
cebix |
1.3 |
for (i=0; i<16; i++) |
| 323 |
cebix |
1.1 |
xlate_colors[colors[i]] = i; |
| 324 |
|
|
|
| 325 |
|
|
// Get the new colors. |
| 326 |
|
|
the_display->InitColors(colors); |
| 327 |
|
|
|
| 328 |
|
|
// Build color translation table. |
| 329 |
cebix |
1.3 |
for (i=0; i<256; i++) |
| 330 |
cebix |
1.1 |
xlate_colors[i] = colors[xlate_colors[i]]; |
| 331 |
|
|
|
| 332 |
|
|
// Translate all the old colors variables. |
| 333 |
|
|
ec_color = colors[ec]; |
| 334 |
|
|
b0c_color = colors[b0c]; |
| 335 |
|
|
b1c_color = colors[b1c]; |
| 336 |
|
|
b2c_color = colors[b2c]; |
| 337 |
|
|
b3c_color = colors[b3c]; |
| 338 |
|
|
mm0_color = colors[mm0]; |
| 339 |
|
|
mm1_color = colors[mm1]; |
| 340 |
cebix |
1.3 |
for (i=0; i<8; i++) |
| 341 |
cebix |
1.1 |
spr_color[i] = colors[sc[i]]; |
| 342 |
|
|
|
| 343 |
|
|
// Translate the border color sample buffer. |
| 344 |
|
|
for (unsigned x = 0; x < sizeof(border_color_sample); x++) |
| 345 |
|
|
border_color_sample[x] = xlate_colors[border_color_sample[x]]; |
| 346 |
|
|
|
| 347 |
|
|
// Translate the chunky buffer. |
| 348 |
|
|
uint8 *scanline = the_display->BitmapBase(); |
| 349 |
cebix |
1.3 |
for (int y=0; y<DISPLAY_Y; y++) { |
| 350 |
|
|
for (int x=0; x<DISPLAY_X; x++) |
| 351 |
cebix |
1.1 |
scanline[x] = xlate_colors[scanline[x]]; |
| 352 |
|
|
scanline += xmod; |
| 353 |
|
|
} |
| 354 |
|
|
} |
| 355 |
|
|
|
| 356 |
|
|
|
| 357 |
|
|
/* |
| 358 |
|
|
* Get VIC state |
| 359 |
|
|
*/ |
| 360 |
|
|
|
| 361 |
|
|
void MOS6569::GetState(MOS6569State *vd) |
| 362 |
|
|
{ |
| 363 |
|
|
int i; |
| 364 |
|
|
|
| 365 |
|
|
vd->m0x = mx[0] & 0xff; vd->m0y = my[0]; |
| 366 |
|
|
vd->m1x = mx[1] & 0xff; vd->m1y = my[1]; |
| 367 |
|
|
vd->m2x = mx[2] & 0xff; vd->m2y = my[2]; |
| 368 |
|
|
vd->m3x = mx[3] & 0xff; vd->m3y = my[3]; |
| 369 |
|
|
vd->m4x = mx[4] & 0xff; vd->m4y = my[4]; |
| 370 |
|
|
vd->m5x = mx[5] & 0xff; vd->m5y = my[5]; |
| 371 |
|
|
vd->m6x = mx[6] & 0xff; vd->m6y = my[6]; |
| 372 |
|
|
vd->m7x = mx[7] & 0xff; vd->m7y = my[7]; |
| 373 |
|
|
vd->mx8 = mx8; |
| 374 |
|
|
|
| 375 |
|
|
vd->ctrl1 = (ctrl1 & 0x7f) | ((raster_y & 0x100) >> 1); |
| 376 |
|
|
vd->raster = raster_y & 0xff; |
| 377 |
|
|
vd->lpx = lpx; vd->lpy = lpy; |
| 378 |
|
|
vd->ctrl2 = ctrl2; |
| 379 |
|
|
vd->vbase = vbase; |
| 380 |
|
|
vd->irq_flag = irq_flag; |
| 381 |
|
|
vd->irq_mask = irq_mask; |
| 382 |
|
|
|
| 383 |
|
|
vd->me = me; vd->mxe = mxe; vd->mye = mye; vd->mdp = mdp; vd->mmc = mmc; |
| 384 |
|
|
vd->mm = clx_spr; vd->md = clx_bgr; |
| 385 |
|
|
|
| 386 |
|
|
vd->ec = ec; |
| 387 |
|
|
vd->b0c = b0c; vd->b1c = b1c; vd->b2c = b2c; vd->b3c = b3c; |
| 388 |
|
|
vd->mm0 = mm0; vd->mm1 = mm1; |
| 389 |
|
|
vd->m0c = sc[0]; |
| 390 |
|
|
vd->m1c = sc[1]; |
| 391 |
|
|
vd->m2c = sc[2]; |
| 392 |
|
|
vd->m3c = sc[3]; |
| 393 |
|
|
vd->m4c = sc[4]; |
| 394 |
|
|
vd->m5c = sc[5]; |
| 395 |
|
|
vd->m6c = sc[6]; |
| 396 |
|
|
vd->m7c = sc[7]; |
| 397 |
|
|
|
| 398 |
|
|
vd->pad0 = 0; |
| 399 |
|
|
vd->irq_raster = irq_raster; |
| 400 |
|
|
vd->vc = vc; |
| 401 |
|
|
vd->vc_base = vc_base; |
| 402 |
|
|
vd->rc = rc; |
| 403 |
|
|
vd->spr_dma = spr_dma_on; |
| 404 |
|
|
vd->spr_disp = spr_disp_on; |
| 405 |
|
|
for (i=0; i<8; i++) { |
| 406 |
|
|
vd->mc[i] = mc[i]; |
| 407 |
|
|
vd->mc_base[i] = mc_base[i]; |
| 408 |
|
|
} |
| 409 |
|
|
vd->display_state = display_state; |
| 410 |
|
|
vd->bad_line = raster_y >= FIRST_DMA_LINE && raster_y <= LAST_DMA_LINE && ((raster_y & 7) == y_scroll) && bad_lines_enabled; |
| 411 |
|
|
vd->bad_line_enable = bad_lines_enabled; |
| 412 |
|
|
vd->lp_triggered = lp_triggered; |
| 413 |
|
|
vd->border_on = border_on; |
| 414 |
|
|
|
| 415 |
|
|
vd->bank_base = cia_vabase; |
| 416 |
|
|
vd->matrix_base = ((vbase & 0xf0) << 6) | cia_vabase; |
| 417 |
|
|
vd->char_base = ((vbase & 0x0e) << 10) | cia_vabase; |
| 418 |
|
|
vd->bitmap_base = ((vbase & 0x08) << 10) | cia_vabase; |
| 419 |
|
|
for (i=0; i<8; i++) |
| 420 |
|
|
vd->sprite_base[i] = spr_ptr[i] | cia_vabase; |
| 421 |
|
|
|
| 422 |
|
|
vd->cycle = cycle; |
| 423 |
|
|
vd->raster_x = raster_x; |
| 424 |
|
|
vd->ml_index = ml_index; |
| 425 |
|
|
vd->ref_cnt = ref_cnt; |
| 426 |
|
|
vd->last_vic_byte = LastVICByte; |
| 427 |
|
|
vd->ud_border_on = ud_border_on; |
| 428 |
|
|
} |
| 429 |
|
|
|
| 430 |
|
|
|
| 431 |
|
|
/* |
| 432 |
|
|
* Set VIC state (only works if in VBlank) |
| 433 |
|
|
*/ |
| 434 |
|
|
|
| 435 |
|
|
void MOS6569::SetState(MOS6569State *vd) |
| 436 |
|
|
{ |
| 437 |
|
|
int i, j; |
| 438 |
|
|
|
| 439 |
|
|
mx[0] = vd->m0x; my[0] = vd->m0y; |
| 440 |
|
|
mx[1] = vd->m1x; my[1] = vd->m1y; |
| 441 |
|
|
mx[2] = vd->m2x; my[2] = vd->m2y; |
| 442 |
|
|
mx[3] = vd->m3x; my[3] = vd->m3y; |
| 443 |
|
|
mx[4] = vd->m4x; my[4] = vd->m4y; |
| 444 |
|
|
mx[5] = vd->m5x; my[5] = vd->m5y; |
| 445 |
|
|
mx[6] = vd->m6x; my[6] = vd->m6y; |
| 446 |
|
|
mx[7] = vd->m7x; my[7] = vd->m7y; |
| 447 |
|
|
mx8 = vd->mx8; |
| 448 |
|
|
for (i=0, j=1; i<8; i++, j<<=1) { |
| 449 |
|
|
if (mx8 & j) |
| 450 |
|
|
mx[i] |= 0x100; |
| 451 |
|
|
else |
| 452 |
|
|
mx[i] &= 0xff; |
| 453 |
|
|
} |
| 454 |
|
|
|
| 455 |
|
|
ctrl1 = vd->ctrl1; |
| 456 |
|
|
ctrl2 = vd->ctrl2; |
| 457 |
|
|
x_scroll = ctrl2 & 7; |
| 458 |
|
|
y_scroll = ctrl1 & 7; |
| 459 |
|
|
if (ctrl1 & 8) { |
| 460 |
|
|
dy_start = ROW25_YSTART; |
| 461 |
|
|
dy_stop = ROW25_YSTOP; |
| 462 |
|
|
} else { |
| 463 |
|
|
dy_start = ROW24_YSTART; |
| 464 |
|
|
dy_stop = ROW24_YSTOP; |
| 465 |
|
|
} |
| 466 |
|
|
display_idx = ((ctrl1 & 0x60) | (ctrl2 & 0x10)) >> 4; |
| 467 |
|
|
|
| 468 |
|
|
raster_y = 0; |
| 469 |
|
|
lpx = vd->lpx; lpy = vd->lpy; |
| 470 |
|
|
|
| 471 |
|
|
vbase = vd->vbase; |
| 472 |
|
|
cia_vabase = vd->bank_base; |
| 473 |
|
|
matrix_base = (vbase & 0xf0) << 6; |
| 474 |
|
|
char_base = (vbase & 0x0e) << 10; |
| 475 |
|
|
bitmap_base = (vbase & 0x08) << 10; |
| 476 |
|
|
|
| 477 |
|
|
irq_flag = vd->irq_flag; |
| 478 |
|
|
irq_mask = vd->irq_mask; |
| 479 |
|
|
|
| 480 |
|
|
me = vd->me; mxe = vd->mxe; mye = vd->mye; mdp = vd->mdp; mmc = vd->mmc; |
| 481 |
|
|
clx_spr = vd->mm; clx_bgr = vd->md; |
| 482 |
|
|
|
| 483 |
|
|
ec = vd->ec; |
| 484 |
|
|
ec_color = colors[ec]; |
| 485 |
|
|
|
| 486 |
|
|
b0c = vd->b0c; b1c = vd->b1c; b2c = vd->b2c; b3c = vd->b3c; |
| 487 |
|
|
b0c_color = colors[b0c]; |
| 488 |
|
|
b1c_color = colors[b1c]; |
| 489 |
|
|
b2c_color = colors[b2c]; |
| 490 |
|
|
b3c_color = colors[b3c]; |
| 491 |
|
|
|
| 492 |
|
|
mm0 = vd->mm0; mm1 = vd->mm1; |
| 493 |
|
|
mm0_color = colors[mm0]; |
| 494 |
|
|
mm1_color = colors[mm1]; |
| 495 |
|
|
|
| 496 |
|
|
sc[0] = vd->m0c; sc[1] = vd->m1c; |
| 497 |
|
|
sc[2] = vd->m2c; sc[3] = vd->m3c; |
| 498 |
|
|
sc[4] = vd->m4c; sc[5] = vd->m5c; |
| 499 |
|
|
sc[6] = vd->m6c; sc[7] = vd->m7c; |
| 500 |
|
|
for (i=0; i<8; i++) |
| 501 |
|
|
spr_color[i] = colors[sc[i]]; |
| 502 |
|
|
|
| 503 |
|
|
irq_raster = vd->irq_raster; |
| 504 |
|
|
vc = vd->vc; |
| 505 |
|
|
vc_base = vd->vc_base; |
| 506 |
|
|
rc = vd->rc; |
| 507 |
|
|
spr_dma_on = vd->spr_dma; |
| 508 |
|
|
spr_disp_on = vd->spr_disp; |
| 509 |
|
|
for (i=0; i<8; i++) { |
| 510 |
|
|
mc[i] = vd->mc[i]; |
| 511 |
|
|
mc_base[i] = vd->mc_base[i]; |
| 512 |
|
|
spr_ptr[i] = vd->sprite_base[i] & 0x3fff; |
| 513 |
|
|
} |
| 514 |
|
|
display_state = vd->display_state; |
| 515 |
|
|
bad_lines_enabled = vd->bad_line_enable; |
| 516 |
|
|
lp_triggered = vd->lp_triggered; |
| 517 |
|
|
border_on = vd->border_on; |
| 518 |
|
|
|
| 519 |
|
|
cycle = vd->cycle; |
| 520 |
|
|
raster_x = vd->raster_x; |
| 521 |
|
|
ml_index = vd->ml_index; |
| 522 |
|
|
ref_cnt = vd->ref_cnt; |
| 523 |
|
|
LastVICByte = vd->last_vic_byte; |
| 524 |
|
|
ud_border_on = vd->ud_border_on; |
| 525 |
|
|
} |
| 526 |
|
|
|
| 527 |
|
|
|
| 528 |
|
|
/* |
| 529 |
|
|
* Trigger raster IRQ |
| 530 |
|
|
*/ |
| 531 |
|
|
|
| 532 |
|
|
#ifdef GLOBAL_VARS |
| 533 |
|
|
static inline void raster_irq(void) |
| 534 |
|
|
#else |
| 535 |
|
|
inline void MOS6569::raster_irq(void) |
| 536 |
|
|
#endif |
| 537 |
|
|
{ |
| 538 |
|
|
irq_flag |= 0x01; |
| 539 |
|
|
if (irq_mask & 0x01) { |
| 540 |
|
|
irq_flag |= 0x80; |
| 541 |
|
|
the_cpu->TriggerVICIRQ(); |
| 542 |
|
|
} |
| 543 |
|
|
} |
| 544 |
|
|
|
| 545 |
|
|
|
| 546 |
|
|
/* |
| 547 |
|
|
* Read from VIC register |
| 548 |
|
|
*/ |
| 549 |
|
|
|
| 550 |
|
|
uint8 MOS6569::ReadRegister(uint16 adr) |
| 551 |
|
|
{ |
| 552 |
|
|
switch (adr) { |
| 553 |
|
|
case 0x00: case 0x02: case 0x04: case 0x06: |
| 554 |
|
|
case 0x08: case 0x0a: case 0x0c: case 0x0e: |
| 555 |
|
|
return mx[adr >> 1]; |
| 556 |
|
|
|
| 557 |
|
|
case 0x01: case 0x03: case 0x05: case 0x07: |
| 558 |
|
|
case 0x09: case 0x0b: case 0x0d: case 0x0f: |
| 559 |
|
|
return my[adr >> 1]; |
| 560 |
|
|
|
| 561 |
|
|
case 0x10: // Sprite X position MSB |
| 562 |
|
|
return mx8; |
| 563 |
|
|
|
| 564 |
|
|
case 0x11: // Control register 1 |
| 565 |
|
|
return (ctrl1 & 0x7f) | ((raster_y & 0x100) >> 1); |
| 566 |
|
|
|
| 567 |
|
|
case 0x12: // Raster counter |
| 568 |
|
|
return raster_y; |
| 569 |
|
|
|
| 570 |
|
|
case 0x13: // Light pen X |
| 571 |
|
|
return lpx; |
| 572 |
|
|
|
| 573 |
|
|
case 0x14: // Light pen Y |
| 574 |
|
|
return lpy; |
| 575 |
|
|
|
| 576 |
|
|
case 0x15: // Sprite enable |
| 577 |
|
|
return me; |
| 578 |
|
|
|
| 579 |
|
|
case 0x16: // Control register 2 |
| 580 |
|
|
return ctrl2 | 0xc0; |
| 581 |
|
|
|
| 582 |
|
|
case 0x17: // Sprite Y expansion |
| 583 |
|
|
return mye; |
| 584 |
|
|
|
| 585 |
|
|
case 0x18: // Memory pointers |
| 586 |
|
|
return vbase | 0x01; |
| 587 |
|
|
|
| 588 |
|
|
case 0x19: // IRQ flags |
| 589 |
|
|
return irq_flag | 0x70; |
| 590 |
|
|
|
| 591 |
|
|
case 0x1a: // IRQ mask |
| 592 |
|
|
return irq_mask | 0xf0; |
| 593 |
|
|
|
| 594 |
|
|
case 0x1b: // Sprite data priority |
| 595 |
|
|
return mdp; |
| 596 |
|
|
|
| 597 |
|
|
case 0x1c: // Sprite multicolor |
| 598 |
|
|
return mmc; |
| 599 |
|
|
|
| 600 |
|
|
case 0x1d: // Sprite X expansion |
| 601 |
|
|
return mxe; |
| 602 |
|
|
|
| 603 |
|
|
case 0x1e:{ // Sprite-sprite collision |
| 604 |
|
|
uint8 ret = clx_spr; |
| 605 |
|
|
clx_spr = 0; // Read and clear |
| 606 |
|
|
return ret; |
| 607 |
|
|
} |
| 608 |
|
|
|
| 609 |
|
|
case 0x1f:{ // Sprite-background collision |
| 610 |
|
|
uint8 ret = clx_bgr; |
| 611 |
|
|
clx_bgr = 0; // Read and clear |
| 612 |
|
|
return ret; |
| 613 |
|
|
} |
| 614 |
|
|
|
| 615 |
|
|
case 0x20: return ec | 0xf0; |
| 616 |
|
|
case 0x21: return b0c | 0xf0; |
| 617 |
|
|
case 0x22: return b1c | 0xf0; |
| 618 |
|
|
case 0x23: return b2c | 0xf0; |
| 619 |
|
|
case 0x24: return b3c | 0xf0; |
| 620 |
|
|
case 0x25: return mm0 | 0xf0; |
| 621 |
|
|
case 0x26: return mm1 | 0xf0; |
| 622 |
|
|
|
| 623 |
|
|
case 0x27: case 0x28: case 0x29: case 0x2a: |
| 624 |
|
|
case 0x2b: case 0x2c: case 0x2d: case 0x2e: |
| 625 |
|
|
return sc[adr - 0x27] | 0xf0; |
| 626 |
|
|
|
| 627 |
|
|
default: |
| 628 |
|
|
return 0xff; |
| 629 |
|
|
} |
| 630 |
|
|
} |
| 631 |
|
|
|
| 632 |
|
|
|
| 633 |
|
|
/* |
| 634 |
|
|
* Write to VIC register |
| 635 |
|
|
*/ |
| 636 |
|
|
|
| 637 |
|
|
void MOS6569::WriteRegister(uint16 adr, uint8 byte) |
| 638 |
|
|
{ |
| 639 |
|
|
switch (adr) { |
| 640 |
|
|
case 0x00: case 0x02: case 0x04: case 0x06: |
| 641 |
|
|
case 0x08: case 0x0a: case 0x0c: case 0x0e: |
| 642 |
|
|
mx[adr >> 1] = (mx[adr >> 1] & 0xff00) | byte; |
| 643 |
|
|
break; |
| 644 |
|
|
|
| 645 |
|
|
case 0x10:{ |
| 646 |
|
|
int i, j; |
| 647 |
|
|
mx8 = byte; |
| 648 |
|
|
for (i=0, j=1; i<8; i++, j<<=1) { |
| 649 |
|
|
if (mx8 & j) |
| 650 |
|
|
mx[i] |= 0x100; |
| 651 |
|
|
else |
| 652 |
|
|
mx[i] &= 0xff; |
| 653 |
|
|
} |
| 654 |
|
|
break; |
| 655 |
|
|
} |
| 656 |
|
|
|
| 657 |
|
|
case 0x01: case 0x03: case 0x05: case 0x07: |
| 658 |
|
|
case 0x09: case 0x0b: case 0x0d: case 0x0f: |
| 659 |
|
|
my[adr >> 1] = byte; |
| 660 |
|
|
break; |
| 661 |
|
|
|
| 662 |
|
|
case 0x11:{ // Control register 1 |
| 663 |
|
|
ctrl1 = byte; |
| 664 |
|
|
y_scroll = byte & 7; |
| 665 |
|
|
|
| 666 |
|
|
uint16 new_irq_raster = (irq_raster & 0xff) | ((byte & 0x80) << 1); |
| 667 |
|
|
if (irq_raster != new_irq_raster && raster_y == new_irq_raster) |
| 668 |
|
|
raster_irq(); |
| 669 |
|
|
irq_raster = new_irq_raster; |
| 670 |
|
|
|
| 671 |
|
|
if (byte & 8) { |
| 672 |
|
|
dy_start = ROW25_YSTART; |
| 673 |
|
|
dy_stop = ROW25_YSTOP; |
| 674 |
|
|
} else { |
| 675 |
|
|
dy_start = ROW24_YSTART; |
| 676 |
|
|
dy_stop = ROW24_YSTOP; |
| 677 |
|
|
} |
| 678 |
|
|
|
| 679 |
|
|
// In line $30, the DEN bit controls if Bad Lines can occur |
| 680 |
|
|
if (raster_y == 0x30 && byte & 0x10) |
| 681 |
|
|
bad_lines_enabled = true; |
| 682 |
|
|
|
| 683 |
|
|
// Bad Line condition? |
| 684 |
|
|
is_bad_line = (raster_y >= FIRST_DMA_LINE && raster_y <= LAST_DMA_LINE && ((raster_y & 7) == y_scroll) && bad_lines_enabled); |
| 685 |
|
|
|
| 686 |
|
|
display_idx = ((ctrl1 & 0x60) | (ctrl2 & 0x10)) >> 4; |
| 687 |
|
|
break; |
| 688 |
|
|
} |
| 689 |
|
|
|
| 690 |
|
|
case 0x12:{ // Raster counter |
| 691 |
|
|
uint16 new_irq_raster = (irq_raster & 0xff00) | byte; |
| 692 |
|
|
if (irq_raster != new_irq_raster && raster_y == new_irq_raster) |
| 693 |
|
|
raster_irq(); |
| 694 |
|
|
irq_raster = new_irq_raster; |
| 695 |
|
|
break; |
| 696 |
|
|
} |
| 697 |
|
|
|
| 698 |
|
|
case 0x15: // Sprite enable |
| 699 |
|
|
me = byte; |
| 700 |
|
|
break; |
| 701 |
|
|
|
| 702 |
|
|
case 0x16: // Control register 2 |
| 703 |
|
|
ctrl2 = byte; |
| 704 |
|
|
x_scroll = byte & 7; |
| 705 |
|
|
display_idx = ((ctrl1 & 0x60) | (ctrl2 & 0x10)) >> 4; |
| 706 |
|
|
break; |
| 707 |
|
|
|
| 708 |
|
|
case 0x17: // Sprite Y expansion |
| 709 |
|
|
mye = byte; |
| 710 |
|
|
spr_exp_y |= ~byte; |
| 711 |
|
|
break; |
| 712 |
|
|
|
| 713 |
|
|
case 0x18: // Memory pointers |
| 714 |
|
|
vbase = byte; |
| 715 |
|
|
matrix_base = (byte & 0xf0) << 6; |
| 716 |
|
|
char_base = (byte & 0x0e) << 10; |
| 717 |
|
|
bitmap_base = (byte & 0x08) << 10; |
| 718 |
|
|
break; |
| 719 |
|
|
|
| 720 |
|
|
case 0x19: // IRQ flags |
| 721 |
|
|
irq_flag = irq_flag & (~byte & 0x0f); |
| 722 |
|
|
if (irq_flag & irq_mask) // Set master bit if allowed interrupt still pending |
| 723 |
|
|
irq_flag |= 0x80; |
| 724 |
|
|
else |
| 725 |
|
|
the_cpu->ClearVICIRQ(); // Else clear interrupt |
| 726 |
|
|
break; |
| 727 |
|
|
|
| 728 |
|
|
case 0x1a: // IRQ mask |
| 729 |
|
|
irq_mask = byte & 0x0f; |
| 730 |
|
|
if (irq_flag & irq_mask) { // Trigger interrupt if pending and now allowed |
| 731 |
|
|
irq_flag |= 0x80; |
| 732 |
|
|
the_cpu->TriggerVICIRQ(); |
| 733 |
|
|
} else { |
| 734 |
|
|
irq_flag &= 0x7f; |
| 735 |
|
|
the_cpu->ClearVICIRQ(); |
| 736 |
|
|
} |
| 737 |
|
|
break; |
| 738 |
|
|
|
| 739 |
|
|
case 0x1b: // Sprite data priority |
| 740 |
|
|
mdp = byte; |
| 741 |
|
|
break; |
| 742 |
|
|
|
| 743 |
|
|
case 0x1c: // Sprite multicolor |
| 744 |
|
|
mmc = byte; |
| 745 |
|
|
break; |
| 746 |
|
|
|
| 747 |
|
|
case 0x1d: // Sprite X expansion |
| 748 |
|
|
mxe = byte; |
| 749 |
|
|
break; |
| 750 |
|
|
|
| 751 |
|
|
case 0x20: ec_color = colors[ec = byte]; break; |
| 752 |
|
|
case 0x21: b0c_color = colors[b0c = byte]; break; |
| 753 |
|
|
case 0x22: b1c_color = colors[b1c = byte]; break; |
| 754 |
|
|
case 0x23: b2c_color = colors[b2c = byte]; break; |
| 755 |
|
|
case 0x24: b3c_color = colors[b3c = byte]; break; |
| 756 |
|
|
case 0x25: mm0_color = colors[mm0 = byte]; break; |
| 757 |
|
|
case 0x26: mm1_color = colors[mm1 = byte]; break; |
| 758 |
|
|
|
| 759 |
|
|
case 0x27: case 0x28: case 0x29: case 0x2a: |
| 760 |
|
|
case 0x2b: case 0x2c: case 0x2d: case 0x2e: |
| 761 |
|
|
spr_color[adr - 0x27] = colors[sc[adr - 0x27] = byte]; |
| 762 |
|
|
break; |
| 763 |
|
|
} |
| 764 |
|
|
} |
| 765 |
|
|
|
| 766 |
|
|
|
| 767 |
|
|
/* |
| 768 |
|
|
* CIA VA14/15 has changed |
| 769 |
|
|
*/ |
| 770 |
|
|
|
| 771 |
|
|
void MOS6569::ChangedVA(uint16 new_va) |
| 772 |
|
|
{ |
| 773 |
|
|
cia_vabase = new_va << 14; |
| 774 |
|
|
WriteRegister(0x18, vbase); // Force update of memory pointers |
| 775 |
|
|
} |
| 776 |
|
|
|
| 777 |
|
|
|
| 778 |
|
|
/* |
| 779 |
|
|
* Trigger lightpen interrupt, latch lightpen coordinates |
| 780 |
|
|
*/ |
| 781 |
|
|
|
| 782 |
|
|
void MOS6569::TriggerLightpen(void) |
| 783 |
|
|
{ |
| 784 |
|
|
if (!lp_triggered) { // Lightpen triggers only once per frame |
| 785 |
|
|
lp_triggered = true; |
| 786 |
|
|
|
| 787 |
|
|
lpx = raster_x >> 1; // Latch current coordinates |
| 788 |
|
|
lpy = raster_y; |
| 789 |
|
|
|
| 790 |
|
|
irq_flag |= 0x08; // Trigger IRQ |
| 791 |
|
|
if (irq_mask & 0x08) { |
| 792 |
|
|
irq_flag |= 0x80; |
| 793 |
|
|
the_cpu->TriggerVICIRQ(); |
| 794 |
|
|
} |
| 795 |
|
|
} |
| 796 |
|
|
} |
| 797 |
|
|
|
| 798 |
|
|
|
| 799 |
|
|
/* |
| 800 |
|
|
* Read a byte from the VIC's address space |
| 801 |
|
|
*/ |
| 802 |
|
|
|
| 803 |
|
|
#ifdef GLOBAL_VARS |
| 804 |
|
|
static inline uint8 read_byte(uint16 adr) |
| 805 |
|
|
#else |
| 806 |
|
|
inline uint8 MOS6569::read_byte(uint16 adr) |
| 807 |
|
|
#endif |
| 808 |
|
|
{ |
| 809 |
|
|
uint16 va = adr | cia_vabase; |
| 810 |
|
|
if ((va & 0x7000) == 0x1000) |
| 811 |
|
|
#ifdef GLOBAL_VARS |
| 812 |
|
|
return the_vic->LastVICByte = char_rom[va & 0x0fff]; |
| 813 |
|
|
#else |
| 814 |
|
|
return LastVICByte = char_rom[va & 0x0fff]; |
| 815 |
|
|
#endif |
| 816 |
|
|
else |
| 817 |
|
|
#ifdef GLOBAL_VARS |
| 818 |
|
|
return the_vic->LastVICByte = ram[va]; |
| 819 |
|
|
#else |
| 820 |
|
|
return LastVICByte = ram[va]; |
| 821 |
|
|
#endif |
| 822 |
|
|
} |
| 823 |
|
|
|
| 824 |
|
|
|
| 825 |
|
|
/* |
| 826 |
|
|
* Quick memset of 8 bytes |
| 827 |
|
|
*/ |
| 828 |
|
|
|
| 829 |
|
|
inline void memset8(uint8 *p, uint8 c) |
| 830 |
|
|
{ |
| 831 |
|
|
p[0] = p[1] = p[2] = p[3] = p[4] = p[5] = p[6] = p[7] = c; |
| 832 |
|
|
} |
| 833 |
|
|
|
| 834 |
|
|
|
| 835 |
|
|
/* |
| 836 |
|
|
* Video matrix access |
| 837 |
|
|
*/ |
| 838 |
|
|
|
| 839 |
|
|
#ifdef __i386 |
| 840 |
|
|
inline |
| 841 |
|
|
#endif |
| 842 |
|
|
#ifdef GLOBAL_VARS |
| 843 |
|
|
static void matrix_access(void) |
| 844 |
|
|
#else |
| 845 |
|
|
void MOS6569::matrix_access(void) |
| 846 |
|
|
#endif |
| 847 |
|
|
{ |
| 848 |
|
|
if (the_cpu->BALow) { |
| 849 |
|
|
if (the_c64->CycleCounter-first_ba_cycle < 3) |
| 850 |
|
|
matrix_line[ml_index] = color_line[ml_index] = 0xff; |
| 851 |
|
|
else { |
| 852 |
|
|
uint16 adr = (vc & 0x03ff) | matrix_base; |
| 853 |
|
|
matrix_line[ml_index] = read_byte(adr); |
| 854 |
|
|
color_line[ml_index] = color_ram[adr & 0x03ff]; |
| 855 |
|
|
} |
| 856 |
|
|
} |
| 857 |
|
|
} |
| 858 |
|
|
|
| 859 |
|
|
|
| 860 |
|
|
/* |
| 861 |
|
|
* Graphics data access |
| 862 |
|
|
*/ |
| 863 |
|
|
|
| 864 |
|
|
#ifdef __i386 |
| 865 |
|
|
inline |
| 866 |
|
|
#endif |
| 867 |
|
|
#ifdef GLOBAL_VARS |
| 868 |
|
|
static void graphics_access(void) |
| 869 |
|
|
#else |
| 870 |
|
|
void MOS6569::graphics_access(void) |
| 871 |
|
|
#endif |
| 872 |
|
|
{ |
| 873 |
|
|
if (display_state) { |
| 874 |
|
|
|
| 875 |
|
|
uint16 adr; |
| 876 |
|
|
if (ctrl1 & 0x20) // Bitmap |
| 877 |
|
|
adr = ((vc & 0x03ff) << 3) | bitmap_base | rc; |
| 878 |
|
|
else // Text |
| 879 |
|
|
adr = (matrix_line[ml_index] << 3) | char_base | rc; |
| 880 |
|
|
if (ctrl1 & 0x40) // ECM |
| 881 |
|
|
adr &= 0xf9ff; |
| 882 |
|
|
gfx_data = read_byte(adr); |
| 883 |
|
|
char_data = matrix_line[ml_index]; |
| 884 |
|
|
color_data = color_line[ml_index]; |
| 885 |
|
|
ml_index++; |
| 886 |
|
|
vc++; |
| 887 |
|
|
|
| 888 |
|
|
} else { |
| 889 |
|
|
|
| 890 |
|
|
// Display is off |
| 891 |
|
|
gfx_data = read_byte(ctrl1 & 0x40 ? 0x39ff : 0x3fff); |
| 892 |
|
|
char_data = color_data = 0; |
| 893 |
|
|
} |
| 894 |
|
|
} |
| 895 |
|
|
|
| 896 |
|
|
|
| 897 |
|
|
/* |
| 898 |
|
|
* Background display (8 pixels) |
| 899 |
|
|
*/ |
| 900 |
|
|
|
| 901 |
|
|
#ifdef GLOBAL_VARS |
| 902 |
|
|
static void draw_background(void) |
| 903 |
|
|
#else |
| 904 |
|
|
void MOS6569::draw_background(void) |
| 905 |
|
|
#endif |
| 906 |
|
|
{ |
| 907 |
|
|
uint8 *p = chunky_ptr; |
| 908 |
|
|
uint8 c; |
| 909 |
|
|
|
| 910 |
|
|
if (!draw_this_line) |
| 911 |
|
|
return; |
| 912 |
|
|
|
| 913 |
|
|
switch (display_idx) { |
| 914 |
|
|
case 0: // Standard text |
| 915 |
|
|
case 1: // Multicolor text |
| 916 |
|
|
case 3: // Multicolor bitmap |
| 917 |
|
|
c = b0c_color; |
| 918 |
|
|
break; |
| 919 |
|
|
case 2: // Standard bitmap |
| 920 |
|
|
c = colors[last_char_data]; |
| 921 |
|
|
break; |
| 922 |
|
|
case 4: // ECM text |
| 923 |
|
|
if (last_char_data & 0x80) |
| 924 |
|
|
if (last_char_data & 0x40) |
| 925 |
|
|
c = b3c_color; |
| 926 |
|
|
else |
| 927 |
|
|
c = b2c_color; |
| 928 |
|
|
else |
| 929 |
|
|
if (last_char_data & 0x40) |
| 930 |
|
|
c = b1c_color; |
| 931 |
|
|
else |
| 932 |
|
|
c = b0c_color; |
| 933 |
|
|
break; |
| 934 |
|
|
default: |
| 935 |
|
|
c = colors[0]; |
| 936 |
|
|
break; |
| 937 |
|
|
} |
| 938 |
|
|
memset8(p, c); |
| 939 |
|
|
} |
| 940 |
|
|
|
| 941 |
|
|
|
| 942 |
|
|
/* |
| 943 |
|
|
* Graphics display (8 pixels) |
| 944 |
|
|
*/ |
| 945 |
|
|
|
| 946 |
|
|
#ifdef __i386 |
| 947 |
|
|
inline |
| 948 |
|
|
#endif |
| 949 |
|
|
#ifdef GLOBAL_VARS |
| 950 |
|
|
static void draw_graphics(void) |
| 951 |
|
|
#else |
| 952 |
|
|
void MOS6569::draw_graphics(void) |
| 953 |
|
|
#endif |
| 954 |
|
|
{ |
| 955 |
|
|
uint8 *p = chunky_ptr + x_scroll; |
| 956 |
|
|
uint8 c[4], data; |
| 957 |
|
|
|
| 958 |
|
|
if (!draw_this_line) |
| 959 |
|
|
return; |
| 960 |
|
|
if (ud_border_on) { |
| 961 |
|
|
draw_background(); |
| 962 |
|
|
return; |
| 963 |
|
|
} |
| 964 |
|
|
|
| 965 |
|
|
switch (display_idx) { |
| 966 |
|
|
|
| 967 |
|
|
case 0: // Standard text |
| 968 |
|
|
c[0] = b0c_color; |
| 969 |
|
|
c[1] = colors[color_data]; |
| 970 |
|
|
goto draw_std; |
| 971 |
|
|
|
| 972 |
|
|
case 1: // Multicolor text |
| 973 |
|
|
if (color_data & 8) { |
| 974 |
|
|
c[0] = b0c_color; |
| 975 |
|
|
c[1] = b1c_color; |
| 976 |
|
|
c[2] = b2c_color; |
| 977 |
|
|
c[3] = colors[color_data & 7]; |
| 978 |
|
|
goto draw_multi; |
| 979 |
|
|
} else { |
| 980 |
|
|
c[0] = b0c_color; |
| 981 |
|
|
c[1] = colors[color_data]; |
| 982 |
|
|
goto draw_std; |
| 983 |
|
|
} |
| 984 |
|
|
|
| 985 |
|
|
case 2: // Standard bitmap |
| 986 |
|
|
c[0] = colors[char_data]; |
| 987 |
|
|
c[1] = colors[char_data >> 4]; |
| 988 |
|
|
goto draw_std; |
| 989 |
|
|
|
| 990 |
|
|
case 3: // Multicolor bitmap |
| 991 |
|
|
c[0]= b0c_color; |
| 992 |
|
|
c[1] = colors[char_data >> 4]; |
| 993 |
|
|
c[2] = colors[char_data]; |
| 994 |
|
|
c[3] = colors[color_data]; |
| 995 |
|
|
goto draw_multi; |
| 996 |
|
|
|
| 997 |
|
|
case 4: // ECM text |
| 998 |
|
|
if (char_data & 0x80) |
| 999 |
|
|
if (char_data & 0x40) |
| 1000 |
|
|
c[0] = b3c_color; |
| 1001 |
|
|
else |
| 1002 |
|
|
c[0] = b2c_color; |
| 1003 |
|
|
else |
| 1004 |
|
|
if (char_data & 0x40) |
| 1005 |
|
|
c[0] = b1c_color; |
| 1006 |
|
|
else |
| 1007 |
|
|
c[0] = b0c_color; |
| 1008 |
|
|
c[1] = colors[color_data]; |
| 1009 |
|
|
goto draw_std; |
| 1010 |
|
|
|
| 1011 |
|
|
case 5: // Invalid multicolor text |
| 1012 |
|
|
memset8(p, colors[0]); |
| 1013 |
|
|
if (color_data & 8) { |
| 1014 |
|
|
fore_mask_ptr[0] |= ((gfx_data & 0xaa) | (gfx_data & 0xaa) >> 1) >> x_scroll; |
| 1015 |
|
|
fore_mask_ptr[1] |= ((gfx_data & 0xaa) | (gfx_data & 0xaa) >> 1) << (8-x_scroll); |
| 1016 |
|
|
} else { |
| 1017 |
|
|
fore_mask_ptr[0] |= gfx_data >> x_scroll; |
| 1018 |
|
|
fore_mask_ptr[1] |= gfx_data << (7-x_scroll); |
| 1019 |
|
|
} |
| 1020 |
|
|
return; |
| 1021 |
|
|
|
| 1022 |
|
|
case 6: // Invalid standard bitmap |
| 1023 |
|
|
memset8(p, colors[0]); |
| 1024 |
|
|
fore_mask_ptr[0] |= gfx_data >> x_scroll; |
| 1025 |
|
|
fore_mask_ptr[1] |= gfx_data << (7-x_scroll); |
| 1026 |
|
|
return; |
| 1027 |
|
|
|
| 1028 |
|
|
case 7: // Invalid multicolor bitmap |
| 1029 |
|
|
memset8(p, colors[0]); |
| 1030 |
|
|
fore_mask_ptr[0] |= ((gfx_data & 0xaa) | (gfx_data & 0xaa) >> 1) >> x_scroll; |
| 1031 |
|
|
fore_mask_ptr[1] |= ((gfx_data & 0xaa) | (gfx_data & 0xaa) >> 1) << (8-x_scroll); |
| 1032 |
|
|
return; |
| 1033 |
|
|
|
| 1034 |
|
|
default: // Can't happen |
| 1035 |
|
|
return; |
| 1036 |
|
|
} |
| 1037 |
|
|
|
| 1038 |
|
|
draw_std: |
| 1039 |
|
|
|
| 1040 |
|
|
fore_mask_ptr[0] |= gfx_data >> x_scroll; |
| 1041 |
|
|
fore_mask_ptr[1] |= gfx_data << (7-x_scroll); |
| 1042 |
|
|
|
| 1043 |
|
|
data = gfx_data; |
| 1044 |
|
|
p[7] = c[data & 1]; data >>= 1; |
| 1045 |
|
|
p[6] = c[data & 1]; data >>= 1; |
| 1046 |
|
|
p[5] = c[data & 1]; data >>= 1; |
| 1047 |
|
|
p[4] = c[data & 1]; data >>= 1; |
| 1048 |
|
|
p[3] = c[data & 1]; data >>= 1; |
| 1049 |
|
|
p[2] = c[data & 1]; data >>= 1; |
| 1050 |
|
|
p[1] = c[data & 1]; data >>= 1; |
| 1051 |
|
|
p[0] = c[data]; |
| 1052 |
|
|
return; |
| 1053 |
|
|
|
| 1054 |
|
|
draw_multi: |
| 1055 |
|
|
|
| 1056 |
|
|
fore_mask_ptr[0] |= ((gfx_data & 0xaa) | (gfx_data & 0xaa) >> 1) >> x_scroll; |
| 1057 |
|
|
fore_mask_ptr[1] |= ((gfx_data & 0xaa) | (gfx_data & 0xaa) >> 1) << (8-x_scroll); |
| 1058 |
|
|
|
| 1059 |
|
|
data = gfx_data; |
| 1060 |
|
|
p[7] = p[6] = c[data & 3]; data >>= 2; |
| 1061 |
|
|
p[5] = p[4] = c[data & 3]; data >>= 2; |
| 1062 |
|
|
p[3] = p[2] = c[data & 3]; data >>= 2; |
| 1063 |
|
|
p[1] = p[0] = c[data]; |
| 1064 |
|
|
return; |
| 1065 |
|
|
} |
| 1066 |
|
|
|
| 1067 |
|
|
|
| 1068 |
|
|
/* |
| 1069 |
|
|
* Sprite display |
| 1070 |
|
|
*/ |
| 1071 |
|
|
|
| 1072 |
|
|
#ifdef GLOBAL_VARS |
| 1073 |
|
|
inline static void draw_sprites(void) |
| 1074 |
|
|
#else |
| 1075 |
|
|
inline void MOS6569::draw_sprites(void) |
| 1076 |
|
|
#endif |
| 1077 |
|
|
{ |
| 1078 |
|
|
int i; |
| 1079 |
|
|
int snum, sbit; // Sprite number/bit mask |
| 1080 |
|
|
int spr_coll=0, gfx_coll=0; |
| 1081 |
|
|
|
| 1082 |
|
|
// Clear sprite collision buffer |
| 1083 |
|
|
{ |
| 1084 |
|
|
uint32 *lp = (uint32 *)spr_coll_buf - 1; |
| 1085 |
|
|
for (i=0; i<DISPLAY_X/4; i++) |
| 1086 |
|
|
*++lp = 0; |
| 1087 |
|
|
} |
| 1088 |
|
|
|
| 1089 |
|
|
// Loop for all sprites |
| 1090 |
|
|
for (snum=0, sbit=1; snum<8; snum++, sbit<<=1) { |
| 1091 |
|
|
|
| 1092 |
|
|
// Is sprite visible? |
| 1093 |
|
|
if ((spr_draw & sbit) && mx[snum] <= DISPLAY_X-32) { |
| 1094 |
|
|
#ifdef __POWERPC__ |
| 1095 |
|
|
uint8 *p = (uint8 *)chunky_tmp + mx[snum] + 8; |
| 1096 |
|
|
#else |
| 1097 |
|
|
uint8 *p = chunky_line_start + mx[snum] + 8; |
| 1098 |
|
|
#endif |
| 1099 |
|
|
uint8 *q = spr_coll_buf + mx[snum] + 8; |
| 1100 |
|
|
uint8 color = spr_color[snum]; |
| 1101 |
|
|
|
| 1102 |
|
|
// Fetch sprite data and mask |
| 1103 |
|
|
uint32 sdata = (spr_draw_data[snum][0] << 24) | (spr_draw_data[snum][1] << 16) | (spr_draw_data[snum][2] << 8); |
| 1104 |
|
|
|
| 1105 |
|
|
int spr_mask_pos = mx[snum] + 8; // Sprite bit position in fore_mask_buf |
| 1106 |
|
|
|
| 1107 |
|
|
uint8 *fmbp = fore_mask_buf + (spr_mask_pos / 8); |
| 1108 |
|
|
int sshift = spr_mask_pos & 7; |
| 1109 |
|
|
uint32 fore_mask = (((*(fmbp+0) << 24) | (*(fmbp+1) << 16) | (*(fmbp+2) << 8) |
| 1110 |
|
|
| (*(fmbp+3))) << sshift) | (*(fmbp+4) >> (8-sshift)); |
| 1111 |
|
|
|
| 1112 |
|
|
if (mxe & sbit) { // X-expanded |
| 1113 |
|
|
if (mx[snum] > DISPLAY_X-56) |
| 1114 |
|
|
continue; |
| 1115 |
|
|
|
| 1116 |
|
|
uint32 sdata_l = 0, sdata_r = 0, fore_mask_r; |
| 1117 |
|
|
fore_mask_r = (((*(fmbp+4) << 24) | (*(fmbp+5) << 16) | (*(fmbp+6) << 8) |
| 1118 |
|
|
| (*(fmbp+7))) << sshift) | (*(fmbp+8) >> (8-sshift)); |
| 1119 |
|
|
|
| 1120 |
|
|
if (mmc & sbit) { // Multicolor mode |
| 1121 |
|
|
uint32 plane0_l, plane0_r, plane1_l, plane1_r; |
| 1122 |
|
|
|
| 1123 |
|
|
// Expand sprite data |
| 1124 |
|
|
sdata_l = MultiExpTable[sdata >> 24 & 0xff] << 16 | MultiExpTable[sdata >> 16 & 0xff]; |
| 1125 |
|
|
sdata_r = MultiExpTable[sdata >> 8 & 0xff] << 16; |
| 1126 |
|
|
|
| 1127 |
|
|
// Convert sprite chunky pixels to bitplanes |
| 1128 |
|
|
plane0_l = (sdata_l & 0x55555555) | (sdata_l & 0x55555555) << 1; |
| 1129 |
|
|
plane1_l = (sdata_l & 0xaaaaaaaa) | (sdata_l & 0xaaaaaaaa) >> 1; |
| 1130 |
|
|
plane0_r = (sdata_r & 0x55555555) | (sdata_r & 0x55555555) << 1; |
| 1131 |
|
|
plane1_r = (sdata_r & 0xaaaaaaaa) | (sdata_r & 0xaaaaaaaa) >> 1; |
| 1132 |
|
|
|
| 1133 |
|
|
// Collision with graphics? |
| 1134 |
|
|
if ((fore_mask & (plane0_l | plane1_l)) || (fore_mask_r & (plane0_r | plane1_r))) { |
| 1135 |
|
|
gfx_coll |= sbit; |
| 1136 |
|
|
if (mdp & sbit) { |
| 1137 |
|
|
plane0_l &= ~fore_mask; // Mask sprite if in background |
| 1138 |
|
|
plane1_l &= ~fore_mask; |
| 1139 |
|
|
plane0_r &= ~fore_mask_r; |
| 1140 |
|
|
plane1_r &= ~fore_mask_r; |
| 1141 |
|
|
} |
| 1142 |
|
|
} |
| 1143 |
|
|
|
| 1144 |
|
|
// Paint sprite |
| 1145 |
|
|
for (i=0; i<32; i++, plane0_l<<=1, plane1_l<<=1) { |
| 1146 |
|
|
uint8 col; |
| 1147 |
|
|
if (plane1_l & 0x80000000) { |
| 1148 |
|
|
if (plane0_l & 0x80000000) |
| 1149 |
|
|
col = mm1_color; |
| 1150 |
|
|
else |
| 1151 |
|
|
col = color; |
| 1152 |
|
|
} else { |
| 1153 |
|
|
if (plane0_l & 0x80000000) |
| 1154 |
|
|
col = mm0_color; |
| 1155 |
|
|
else |
| 1156 |
|
|
continue; |
| 1157 |
|
|
} |
| 1158 |
|
|
if (q[i]) |
| 1159 |
|
|
spr_coll |= q[i] | sbit; |
| 1160 |
|
|
else { |
| 1161 |
|
|
p[i] = col; |
| 1162 |
|
|
q[i] = sbit; |
| 1163 |
|
|
} |
| 1164 |
|
|
} |
| 1165 |
|
|
for (; i<48; i++, plane0_r<<=1, plane1_r<<=1) { |
| 1166 |
|
|
uint8 col; |
| 1167 |
|
|
if (plane1_r & 0x80000000) { |
| 1168 |
|
|
if (plane0_r & 0x80000000) |
| 1169 |
|
|
col = mm1_color; |
| 1170 |
|
|
else |
| 1171 |
|
|
col = color; |
| 1172 |
|
|
} else { |
| 1173 |
|
|
if (plane0_r & 0x80000000) |
| 1174 |
|
|
col = mm0_color; |
| 1175 |
|
|
else |
| 1176 |
|
|
continue; |
| 1177 |
|
|
} |
| 1178 |
|
|
if (q[i]) |
| 1179 |
|
|
spr_coll |= q[i] | sbit; |
| 1180 |
|
|
else { |
| 1181 |
|
|
p[i] = col; |
| 1182 |
|
|
q[i] = sbit; |
| 1183 |
|
|
} |
| 1184 |
|
|
} |
| 1185 |
|
|
|
| 1186 |
|
|
} else { // Standard mode |
| 1187 |
|
|
|
| 1188 |
|
|
// Expand sprite data |
| 1189 |
|
|
sdata_l = ExpTable[sdata >> 24 & 0xff] << 16 | ExpTable[sdata >> 16 & 0xff]; |
| 1190 |
|
|
sdata_r = ExpTable[sdata >> 8 & 0xff] << 16; |
| 1191 |
|
|
|
| 1192 |
|
|
// Collision with graphics? |
| 1193 |
|
|
if ((fore_mask & sdata_l) || (fore_mask_r & sdata_r)) { |
| 1194 |
|
|
gfx_coll |= sbit; |
| 1195 |
|
|
if (mdp & sbit) { |
| 1196 |
|
|
sdata_l &= ~fore_mask; // Mask sprite if in background |
| 1197 |
|
|
sdata_r &= ~fore_mask_r; |
| 1198 |
|
|
} |
| 1199 |
|
|
} |
| 1200 |
|
|
|
| 1201 |
|
|
// Paint sprite |
| 1202 |
|
|
for (i=0; i<32; i++, sdata_l<<=1) |
| 1203 |
|
|
if (sdata_l & 0x80000000) { |
| 1204 |
|
|
if (q[i]) // Collision with sprite? |
| 1205 |
|
|
spr_coll |= q[i] | sbit; |
| 1206 |
|
|
else { // Draw pixel if no collision |
| 1207 |
|
|
p[i] = color; |
| 1208 |
|
|
q[i] = sbit; |
| 1209 |
|
|
} |
| 1210 |
|
|
} |
| 1211 |
|
|
for (; i<48; i++, sdata_r<<=1) |
| 1212 |
|
|
if (sdata_r & 0x80000000) { |
| 1213 |
|
|
if (q[i]) // Collision with sprite? |
| 1214 |
|
|
spr_coll |= q[i] | sbit; |
| 1215 |
|
|
else { // Draw pixel if no collision |
| 1216 |
|
|
p[i] = color; |
| 1217 |
|
|
q[i] = sbit; |
| 1218 |
|
|
} |
| 1219 |
|
|
} |
| 1220 |
|
|
} |
| 1221 |
|
|
|
| 1222 |
|
|
} else { // Unexpanded |
| 1223 |
|
|
|
| 1224 |
|
|
if (mmc & sbit) { // Multicolor mode |
| 1225 |
|
|
uint32 plane0, plane1; |
| 1226 |
|
|
|
| 1227 |
|
|
// Convert sprite chunky pixels to bitplanes |
| 1228 |
|
|
plane0 = (sdata & 0x55555555) | (sdata & 0x55555555) << 1; |
| 1229 |
|
|
plane1 = (sdata & 0xaaaaaaaa) | (sdata & 0xaaaaaaaa) >> 1; |
| 1230 |
|
|
|
| 1231 |
|
|
// Collision with graphics? |
| 1232 |
|
|
if (fore_mask & (plane0 | plane1)) { |
| 1233 |
|
|
gfx_coll |= sbit; |
| 1234 |
|
|
if (mdp & sbit) { |
| 1235 |
|
|
plane0 &= ~fore_mask; // Mask sprite if in background |
| 1236 |
|
|
plane1 &= ~fore_mask; |
| 1237 |
|
|
} |
| 1238 |
|
|
} |
| 1239 |
|
|
|
| 1240 |
|
|
// Paint sprite |
| 1241 |
|
|
for (i=0; i<24; i++, plane0<<=1, plane1<<=1) { |
| 1242 |
|
|
uint8 col; |
| 1243 |
|
|
if (plane1 & 0x80000000) { |
| 1244 |
|
|
if (plane0 & 0x80000000) |
| 1245 |
|
|
col = mm1_color; |
| 1246 |
|
|
else |
| 1247 |
|
|
col = color; |
| 1248 |
|
|
} else { |
| 1249 |
|
|
if (plane0 & 0x80000000) |
| 1250 |
|
|
col = mm0_color; |
| 1251 |
|
|
else |
| 1252 |
|
|
continue; |
| 1253 |
|
|
} |
| 1254 |
|
|
if (q[i]) |
| 1255 |
|
|
spr_coll |= q[i] | sbit; |
| 1256 |
|
|
else { |
| 1257 |
|
|
p[i] = col; |
| 1258 |
|
|
q[i] = sbit; |
| 1259 |
|
|
} |
| 1260 |
|
|
} |
| 1261 |
|
|
|
| 1262 |
|
|
} else { // Standard mode |
| 1263 |
|
|
|
| 1264 |
|
|
// Collision with graphics? |
| 1265 |
|
|
if (fore_mask & sdata) { |
| 1266 |
|
|
gfx_coll |= sbit; |
| 1267 |
|
|
if (mdp & sbit) |
| 1268 |
|
|
sdata &= ~fore_mask; // Mask sprite if in background |
| 1269 |
|
|
} |
| 1270 |
|
|
|
| 1271 |
|
|
// Paint sprite |
| 1272 |
|
|
for (i=0; i<24; i++, sdata<<=1) |
| 1273 |
|
|
if (sdata & 0x80000000) { |
| 1274 |
|
|
if (q[i]) { // Collision with sprite? |
| 1275 |
|
|
spr_coll |= q[i] | sbit; |
| 1276 |
|
|
} else { // Draw pixel if no collision |
| 1277 |
|
|
p[i] = color; |
| 1278 |
|
|
q[i] = sbit; |
| 1279 |
|
|
} |
| 1280 |
|
|
} |
| 1281 |
|
|
} |
| 1282 |
|
|
} |
| 1283 |
|
|
} |
| 1284 |
|
|
} |
| 1285 |
|
|
|
| 1286 |
|
|
if (ThePrefs.SpriteCollisions) { |
| 1287 |
|
|
|
| 1288 |
|
|
// Check sprite-sprite collisions |
| 1289 |
|
|
if (clx_spr) |
| 1290 |
|
|
clx_spr |= spr_coll; |
| 1291 |
|
|
else { |
| 1292 |
|
|
clx_spr |= spr_coll; |
| 1293 |
|
|
irq_flag |= 0x04; |
| 1294 |
|
|
if (irq_mask & 0x04) { |
| 1295 |
|
|
irq_flag |= 0x80; |
| 1296 |
|
|
the_cpu->TriggerVICIRQ(); |
| 1297 |
|
|
} |
| 1298 |
|
|
} |
| 1299 |
|
|
|
| 1300 |
|
|
// Check sprite-background collisions |
| 1301 |
|
|
if (clx_bgr) |
| 1302 |
|
|
clx_bgr |= gfx_coll; |
| 1303 |
|
|
else { |
| 1304 |
|
|
clx_bgr |= gfx_coll; |
| 1305 |
|
|
irq_flag |= 0x02; |
| 1306 |
|
|
if (irq_mask & 0x02) { |
| 1307 |
|
|
irq_flag |= 0x80; |
| 1308 |
|
|
the_cpu->TriggerVICIRQ(); |
| 1309 |
|
|
} |
| 1310 |
|
|
} |
| 1311 |
|
|
} |
| 1312 |
|
|
} |
| 1313 |
|
|
|
| 1314 |
|
|
|
| 1315 |
|
|
#ifdef __POWERPC__ |
| 1316 |
|
|
static asm void fastcopy(register uchar *dst, register uchar *src); |
| 1317 |
|
|
static asm void fastcopy(register uchar *dst, register uchar *src) |
| 1318 |
|
|
{ |
| 1319 |
|
|
lfd fp0,0(src) |
| 1320 |
|
|
lfd fp1,8(src) |
| 1321 |
|
|
lfd fp2,16(src) |
| 1322 |
|
|
lfd fp3,24(src) |
| 1323 |
|
|
lfd fp4,32(src) |
| 1324 |
|
|
lfd fp5,40(src) |
| 1325 |
|
|
lfd fp6,48(src) |
| 1326 |
|
|
lfd fp7,56(src) |
| 1327 |
|
|
addi src,src,64 |
| 1328 |
|
|
stfd fp0,0(dst) |
| 1329 |
|
|
stfd fp1,8(dst) |
| 1330 |
|
|
stfd fp2,16(dst) |
| 1331 |
|
|
stfd fp3,24(dst) |
| 1332 |
|
|
stfd fp4,32(dst) |
| 1333 |
|
|
stfd fp5,40(dst) |
| 1334 |
|
|
stfd fp6,48(dst) |
| 1335 |
|
|
stfd fp7,56(dst) |
| 1336 |
|
|
addi dst,dst,64 |
| 1337 |
|
|
|
| 1338 |
|
|
lfd fp0,0(src) |
| 1339 |
|
|
lfd fp1,8(src) |
| 1340 |
|
|
lfd fp2,16(src) |
| 1341 |
|
|
lfd fp3,24(src) |
| 1342 |
|
|
lfd fp4,32(src) |
| 1343 |
|
|
lfd fp5,40(src) |
| 1344 |
|
|
lfd fp6,48(src) |
| 1345 |
|
|
lfd fp7,56(src) |
| 1346 |
|
|
addi src,src,64 |
| 1347 |
|
|
stfd fp0,0(dst) |
| 1348 |
|
|
stfd fp1,8(dst) |
| 1349 |
|
|
stfd fp2,16(dst) |
| 1350 |
|
|
stfd fp3,24(dst) |
| 1351 |
|
|
stfd fp4,32(dst) |
| 1352 |
|
|
stfd fp5,40(dst) |
| 1353 |
|
|
stfd fp6,48(dst) |
| 1354 |
|
|
stfd fp7,56(dst) |
| 1355 |
|
|
addi dst,dst,64 |
| 1356 |
|
|
|
| 1357 |
|
|
lfd fp0,0(src) |
| 1358 |
|
|
lfd fp1,8(src) |
| 1359 |
|
|
lfd fp2,16(src) |
| 1360 |
|
|
lfd fp3,24(src) |
| 1361 |
|
|
lfd fp4,32(src) |
| 1362 |
|
|
lfd fp5,40(src) |
| 1363 |
|
|
lfd fp6,48(src) |
| 1364 |
|
|
lfd fp7,56(src) |
| 1365 |
|
|
addi src,src,64 |
| 1366 |
|
|
stfd fp0,0(dst) |
| 1367 |
|
|
stfd fp1,8(dst) |
| 1368 |
|
|
stfd fp2,16(dst) |
| 1369 |
|
|
stfd fp3,24(dst) |
| 1370 |
|
|
stfd fp4,32(dst) |
| 1371 |
|
|
stfd fp5,40(dst) |
| 1372 |
|
|
stfd fp6,48(dst) |
| 1373 |
|
|
stfd fp7,56(dst) |
| 1374 |
|
|
addi dst,dst,64 |
| 1375 |
|
|
|
| 1376 |
|
|
lfd fp0,0(src) |
| 1377 |
|
|
lfd fp1,8(src) |
| 1378 |
|
|
lfd fp2,16(src) |
| 1379 |
|
|
lfd fp3,24(src) |
| 1380 |
|
|
lfd fp4,32(src) |
| 1381 |
|
|
lfd fp5,40(src) |
| 1382 |
|
|
lfd fp6,48(src) |
| 1383 |
|
|
lfd fp7,56(src) |
| 1384 |
|
|
addi src,src,64 |
| 1385 |
|
|
stfd fp0,0(dst) |
| 1386 |
|
|
stfd fp1,8(dst) |
| 1387 |
|
|
stfd fp2,16(dst) |
| 1388 |
|
|
stfd fp3,24(dst) |
| 1389 |
|
|
stfd fp4,32(dst) |
| 1390 |
|
|
stfd fp5,40(dst) |
| 1391 |
|
|
stfd fp6,48(dst) |
| 1392 |
|
|
stfd fp7,56(dst) |
| 1393 |
|
|
addi dst,dst,64 |
| 1394 |
|
|
|
| 1395 |
|
|
lfd fp0,0(src) |
| 1396 |
|
|
lfd fp1,8(src) |
| 1397 |
|
|
lfd fp2,16(src) |
| 1398 |
|
|
lfd fp3,24(src) |
| 1399 |
|
|
lfd fp4,32(src) |
| 1400 |
|
|
lfd fp5,40(src) |
| 1401 |
|
|
lfd fp6,48(src) |
| 1402 |
|
|
lfd fp7,56(src) |
| 1403 |
|
|
addi src,src,64 |
| 1404 |
|
|
stfd fp0,0(dst) |
| 1405 |
|
|
stfd fp1,8(dst) |
| 1406 |
|
|
stfd fp2,16(dst) |
| 1407 |
|
|
stfd fp3,24(dst) |
| 1408 |
|
|
stfd fp4,32(dst) |
| 1409 |
|
|
stfd fp5,40(dst) |
| 1410 |
|
|
stfd fp6,48(dst) |
| 1411 |
|
|
stfd fp7,56(dst) |
| 1412 |
|
|
addi dst,dst,64 |
| 1413 |
|
|
|
| 1414 |
|
|
lfd fp0,0(src) |
| 1415 |
|
|
lfd fp1,8(src) |
| 1416 |
|
|
lfd fp2,16(src) |
| 1417 |
|
|
lfd fp3,24(src) |
| 1418 |
|
|
lfd fp4,32(src) |
| 1419 |
|
|
lfd fp5,40(src) |
| 1420 |
|
|
lfd fp6,48(src) |
| 1421 |
|
|
lfd fp7,56(src) |
| 1422 |
|
|
addi src,src,64 |
| 1423 |
|
|
stfd fp0,0(dst) |
| 1424 |
|
|
stfd fp1,8(dst) |
| 1425 |
|
|
stfd fp2,16(dst) |
| 1426 |
|
|
stfd fp3,24(dst) |
| 1427 |
|
|
stfd fp4,32(dst) |
| 1428 |
|
|
stfd fp5,40(dst) |
| 1429 |
|
|
stfd fp6,48(dst) |
| 1430 |
|
|
stfd fp7,56(dst) |
| 1431 |
|
|
addi dst,dst,64 |
| 1432 |
|
|
blr |
| 1433 |
|
|
} |
| 1434 |
|
|
#endif |
| 1435 |
|
|
|
| 1436 |
|
|
|
| 1437 |
|
|
/* |
| 1438 |
|
|
* Emulate one clock cycle, returns true if new raster line has started |
| 1439 |
|
|
*/ |
| 1440 |
|
|
|
| 1441 |
|
|
// Set BA low |
| 1442 |
|
|
#define SetBALow \ |
| 1443 |
|
|
if (!the_cpu->BALow) { \ |
| 1444 |
|
|
first_ba_cycle = the_c64->CycleCounter; \ |
| 1445 |
|
|
the_cpu->BALow = true; \ |
| 1446 |
|
|
} |
| 1447 |
|
|
|
| 1448 |
|
|
// Turn on display if Bad Line |
| 1449 |
|
|
#define DisplayIfBadLine \ |
| 1450 |
|
|
if (is_bad_line) \ |
| 1451 |
|
|
display_state = true; |
| 1452 |
|
|
|
| 1453 |
|
|
// Turn on display and matrix access if Bad Line |
| 1454 |
|
|
#define FetchIfBadLine \ |
| 1455 |
|
|
if (is_bad_line) { \ |
| 1456 |
|
|
display_state = true; \ |
| 1457 |
|
|
SetBALow; \ |
| 1458 |
|
|
} |
| 1459 |
|
|
|
| 1460 |
|
|
// Turn on display and matrix access and reset RC if Bad Line |
| 1461 |
|
|
#define RCIfBadLine \ |
| 1462 |
|
|
if (is_bad_line) { \ |
| 1463 |
|
|
display_state = true; \ |
| 1464 |
|
|
rc = 0; \ |
| 1465 |
|
|
SetBALow; \ |
| 1466 |
|
|
} |
| 1467 |
|
|
|
| 1468 |
|
|
// Idle access |
| 1469 |
|
|
#define IdleAccess \ |
| 1470 |
|
|
read_byte(0x3fff) |
| 1471 |
|
|
|
| 1472 |
|
|
// Refresh access |
| 1473 |
|
|
#define RefreshAccess \ |
| 1474 |
|
|
read_byte(0x3f00 | ref_cnt--) |
| 1475 |
|
|
|
| 1476 |
|
|
// Turn on sprite DMA if necessary |
| 1477 |
|
|
#define CheckSpriteDMA \ |
| 1478 |
|
|
mask = 1; \ |
| 1479 |
|
|
for (i=0; i<8; i++, mask<<=1) \ |
| 1480 |
|
|
if ((me & mask) && (raster_y & 0xff) == my[i]) { \ |
| 1481 |
|
|
spr_dma_on |= mask; \ |
| 1482 |
|
|
mc_base[i] = 0; \ |
| 1483 |
|
|
if (mye & mask) \ |
| 1484 |
|
|
spr_exp_y &= ~mask; \ |
| 1485 |
|
|
} |
| 1486 |
|
|
|
| 1487 |
|
|
// Fetch sprite data pointer |
| 1488 |
|
|
#define SprPtrAccess(num) \ |
| 1489 |
|
|
spr_ptr[num] = read_byte(matrix_base | 0x03f8 | num) << 6; |
| 1490 |
|
|
|
| 1491 |
|
|
// Fetch sprite data, increment data counter |
| 1492 |
|
|
#define SprDataAccess(num, bytenum) \ |
| 1493 |
|
|
if (spr_dma_on & (1 << num)) { \ |
| 1494 |
|
|
spr_data[num][bytenum] = read_byte(mc[num] & 0x3f | spr_ptr[num]); \ |
| 1495 |
|
|
mc[num]++; \ |
| 1496 |
|
|
} else if (bytenum == 1) \ |
| 1497 |
|
|
IdleAccess; |
| 1498 |
|
|
|
| 1499 |
|
|
// Sample border color and increment chunky_ptr and fore_mask_ptr |
| 1500 |
|
|
#define SampleBorder \ |
| 1501 |
|
|
if (draw_this_line) { \ |
| 1502 |
|
|
if (border_on) \ |
| 1503 |
|
|
border_color_sample[cycle-13] = ec_color; \ |
| 1504 |
|
|
chunky_ptr += 8; \ |
| 1505 |
|
|
fore_mask_ptr++; \ |
| 1506 |
|
|
} |
| 1507 |
|
|
|
| 1508 |
|
|
|
| 1509 |
|
|
bool MOS6569::EmulateCycle(void) |
| 1510 |
|
|
{ |
| 1511 |
|
|
uint8 mask; |
| 1512 |
|
|
int i; |
| 1513 |
|
|
|
| 1514 |
|
|
switch (cycle) { |
| 1515 |
|
|
|
| 1516 |
|
|
// Fetch sprite pointer 3, increment raster counter, trigger raster IRQ, |
| 1517 |
|
|
// test for Bad Line, reset BA if sprites 3 and 4 off, read data of sprite 3 |
| 1518 |
|
|
case 1: |
| 1519 |
cebix |
1.6 |
if (raster_y == TOTAL_RASTERS-1) { |
| 1520 |
cebix |
1.1 |
|
| 1521 |
|
|
// Trigger VBlank in cycle 2 |
| 1522 |
|
|
vblanking = true; |
| 1523 |
|
|
|
| 1524 |
cebix |
1.6 |
} else { |
| 1525 |
cebix |
1.1 |
|
| 1526 |
|
|
// Increment raster counter |
| 1527 |
|
|
raster_y++; |
| 1528 |
|
|
|
| 1529 |
|
|
// Trigger raster IRQ if IRQ line reached |
| 1530 |
|
|
if (raster_y == irq_raster) |
| 1531 |
|
|
raster_irq(); |
| 1532 |
|
|
|
| 1533 |
|
|
// In line $30, the DEN bit controls if Bad Lines can occur |
| 1534 |
|
|
if (raster_y == 0x30) |
| 1535 |
|
|
bad_lines_enabled = ctrl1 & 0x10; |
| 1536 |
|
|
|
| 1537 |
|
|
// Bad Line condition? |
| 1538 |
|
|
is_bad_line = (raster_y >= FIRST_DMA_LINE && raster_y <= LAST_DMA_LINE && ((raster_y & 7) == y_scroll) && bad_lines_enabled); |
| 1539 |
|
|
|
| 1540 |
|
|
// Don't draw all lines, hide some at the top and bottom |
| 1541 |
|
|
draw_this_line = (raster_y >= FIRST_DISP_LINE && raster_y <= LAST_DISP_LINE && !frame_skipped); |
| 1542 |
|
|
} |
| 1543 |
|
|
|
| 1544 |
|
|
// First sample of border state |
| 1545 |
|
|
border_on_sample[0] = border_on; |
| 1546 |
|
|
|
| 1547 |
|
|
SprPtrAccess(3); |
| 1548 |
|
|
SprDataAccess(3, 0); |
| 1549 |
|
|
DisplayIfBadLine; |
| 1550 |
|
|
if (!(spr_dma_on & 0x18)) |
| 1551 |
|
|
the_cpu->BALow = false; |
| 1552 |
|
|
break; |
| 1553 |
|
|
|
| 1554 |
|
|
// Set BA for sprite 5, read data of sprite 3 |
| 1555 |
|
|
case 2: |
| 1556 |
|
|
if (vblanking) { |
| 1557 |
|
|
|
| 1558 |
|
|
// Vertical blank, reset counters |
| 1559 |
|
|
raster_y = vc_base = 0; |
| 1560 |
|
|
ref_cnt = 0xff; |
| 1561 |
|
|
lp_triggered = vblanking = false; |
| 1562 |
|
|
|
| 1563 |
|
|
if (!(frame_skipped = --skip_counter)) |
| 1564 |
|
|
skip_counter = ThePrefs.SkipFrames; |
| 1565 |
|
|
|
| 1566 |
|
|
the_c64->VBlank(!frame_skipped); |
| 1567 |
|
|
|
| 1568 |
|
|
// Get bitmap pointer for next frame. This must be done |
| 1569 |
|
|
// after calling the_c64->VBlank() because the preferences |
| 1570 |
|
|
// and screen configuration may have been changed there |
| 1571 |
|
|
chunky_line_start = the_display->BitmapBase(); |
| 1572 |
|
|
xmod = the_display->BitmapXMod(); |
| 1573 |
|
|
|
| 1574 |
|
|
// Trigger raster IRQ if IRQ in line 0 |
| 1575 |
|
|
if (irq_raster == 0) |
| 1576 |
|
|
raster_irq(); |
| 1577 |
|
|
|
| 1578 |
|
|
} |
| 1579 |
|
|
|
| 1580 |
|
|
// Our output goes here |
| 1581 |
|
|
#ifdef __POWERPC__ |
| 1582 |
|
|
chunky_ptr = (uint8 *)chunky_tmp; |
| 1583 |
|
|
#else |
| 1584 |
|
|
chunky_ptr = chunky_line_start; |
| 1585 |
|
|
#endif |
| 1586 |
|
|
|
| 1587 |
|
|
// Clear foreground mask |
| 1588 |
|
|
memset(fore_mask_buf, 0, DISPLAY_X/8); |
| 1589 |
|
|
fore_mask_ptr = fore_mask_buf; |
| 1590 |
|
|
|
| 1591 |
|
|
SprDataAccess(3,1); |
| 1592 |
|
|
SprDataAccess(3,2); |
| 1593 |
|
|
DisplayIfBadLine; |
| 1594 |
|
|
if (spr_dma_on & 0x20) |
| 1595 |
|
|
SetBALow; |
| 1596 |
|
|
break; |
| 1597 |
|
|
|
| 1598 |
|
|
// Fetch sprite pointer 4, reset BA is sprite 4 and 5 off |
| 1599 |
|
|
case 3: |
| 1600 |
|
|
SprPtrAccess(4); |
| 1601 |
|
|
SprDataAccess(4, 0); |
| 1602 |
|
|
DisplayIfBadLine; |
| 1603 |
|
|
if (!(spr_dma_on & 0x30)) |
| 1604 |
|
|
the_cpu->BALow = false; |
| 1605 |
|
|
break; |
| 1606 |
|
|
|
| 1607 |
|
|
// Set BA for sprite 6, read data of sprite 4 |
| 1608 |
|
|
case 4: |
| 1609 |
|
|
SprDataAccess(4, 1); |
| 1610 |
|
|
SprDataAccess(4, 2); |
| 1611 |
|
|
DisplayIfBadLine; |
| 1612 |
|
|
if (spr_dma_on & 0x40) |
| 1613 |
|
|
SetBALow; |
| 1614 |
|
|
break; |
| 1615 |
|
|
|
| 1616 |
|
|
// Fetch sprite pointer 5, reset BA if sprite 5 and 6 off |
| 1617 |
|
|
case 5: |
| 1618 |
|
|
SprPtrAccess(5); |
| 1619 |
|
|
SprDataAccess(5, 0); |
| 1620 |
|
|
DisplayIfBadLine; |
| 1621 |
|
|
if (!(spr_dma_on & 0x60)) |
| 1622 |
|
|
the_cpu->BALow = false; |
| 1623 |
|
|
break; |
| 1624 |
|
|
|
| 1625 |
|
|
// Set BA for sprite 7, read data of sprite 5 |
| 1626 |
|
|
case 6: |
| 1627 |
|
|
SprDataAccess(5, 1); |
| 1628 |
|
|
SprDataAccess(5, 2); |
| 1629 |
|
|
DisplayIfBadLine; |
| 1630 |
|
|
if (spr_dma_on & 0x80) |
| 1631 |
|
|
SetBALow; |
| 1632 |
|
|
break; |
| 1633 |
|
|
|
| 1634 |
|
|
// Fetch sprite pointer 6, reset BA if sprite 6 and 7 off |
| 1635 |
|
|
case 7: |
| 1636 |
|
|
SprPtrAccess(6); |
| 1637 |
|
|
SprDataAccess(6, 0); |
| 1638 |
|
|
DisplayIfBadLine; |
| 1639 |
|
|
if (!(spr_dma_on & 0xc0)) |
| 1640 |
|
|
the_cpu->BALow = false; |
| 1641 |
|
|
break; |
| 1642 |
|
|
|
| 1643 |
|
|
// Read data of sprite 6 |
| 1644 |
|
|
case 8: |
| 1645 |
|
|
SprDataAccess(6, 1); |
| 1646 |
|
|
SprDataAccess(6, 2); |
| 1647 |
|
|
DisplayIfBadLine; |
| 1648 |
|
|
break; |
| 1649 |
|
|
|
| 1650 |
|
|
// Fetch sprite pointer 7, reset BA if sprite 7 off |
| 1651 |
|
|
case 9: |
| 1652 |
|
|
SprPtrAccess(7); |
| 1653 |
|
|
SprDataAccess(7, 0); |
| 1654 |
|
|
DisplayIfBadLine; |
| 1655 |
|
|
if (!(spr_dma_on & 0x80)) |
| 1656 |
|
|
the_cpu->BALow = false; |
| 1657 |
|
|
break; |
| 1658 |
|
|
|
| 1659 |
|
|
// Read data of sprite 7 |
| 1660 |
|
|
case 10: |
| 1661 |
|
|
SprDataAccess(7, 1); |
| 1662 |
|
|
SprDataAccess(7, 2); |
| 1663 |
|
|
DisplayIfBadLine; |
| 1664 |
|
|
break; |
| 1665 |
|
|
|
| 1666 |
|
|
// Refresh, reset BA |
| 1667 |
|
|
case 11: |
| 1668 |
|
|
RefreshAccess; |
| 1669 |
|
|
DisplayIfBadLine; |
| 1670 |
|
|
the_cpu->BALow = false; |
| 1671 |
|
|
break; |
| 1672 |
|
|
|
| 1673 |
|
|
// Refresh, turn on matrix access if Bad Line |
| 1674 |
|
|
case 12: |
| 1675 |
|
|
RefreshAccess; |
| 1676 |
|
|
FetchIfBadLine; |
| 1677 |
|
|
break; |
| 1678 |
|
|
|
| 1679 |
|
|
// Refresh, turn on matrix access if Bad Line, reset raster_x, graphics display starts here |
| 1680 |
|
|
case 13: |
| 1681 |
|
|
draw_background(); |
| 1682 |
|
|
SampleBorder; |
| 1683 |
|
|
RefreshAccess; |
| 1684 |
|
|
FetchIfBadLine; |
| 1685 |
|
|
raster_x = 0xfffc; |
| 1686 |
|
|
break; |
| 1687 |
|
|
|
| 1688 |
|
|
// Refresh, VCBASE->VCCOUNT, turn on matrix access and reset RC if Bad Line |
| 1689 |
|
|
case 14: |
| 1690 |
|
|
draw_background(); |
| 1691 |
|
|
SampleBorder; |
| 1692 |
|
|
RefreshAccess; |
| 1693 |
|
|
RCIfBadLine; |
| 1694 |
|
|
vc = vc_base; |
| 1695 |
|
|
break; |
| 1696 |
|
|
|
| 1697 |
|
|
// Refresh and matrix access, increment mc_base by 2 if y expansion flipflop is set |
| 1698 |
|
|
case 15: |
| 1699 |
|
|
draw_background(); |
| 1700 |
|
|
SampleBorder; |
| 1701 |
|
|
RefreshAccess; |
| 1702 |
|
|
FetchIfBadLine; |
| 1703 |
|
|
|
| 1704 |
|
|
for (i=0; i<8; i++) |
| 1705 |
|
|
if (spr_exp_y & (1 << i)) |
| 1706 |
|
|
mc_base[i] += 2; |
| 1707 |
|
|
|
| 1708 |
|
|
ml_index = 0; |
| 1709 |
|
|
matrix_access(); |
| 1710 |
|
|
break; |
| 1711 |
|
|
|
| 1712 |
|
|
// Graphics and matrix access, increment mc_base by 1 if y expansion flipflop is set |
| 1713 |
|
|
// and check if sprite DMA can be turned off |
| 1714 |
|
|
case 16: |
| 1715 |
|
|
draw_background(); |
| 1716 |
|
|
SampleBorder; |
| 1717 |
|
|
graphics_access(); |
| 1718 |
|
|
FetchIfBadLine; |
| 1719 |
|
|
|
| 1720 |
|
|
mask = 1; |
| 1721 |
|
|
for (i=0; i<8; i++, mask<<=1) { |
| 1722 |
|
|
if (spr_exp_y & mask) |
| 1723 |
|
|
mc_base[i]++; |
| 1724 |
|
|
if ((mc_base[i] & 0x3f) == 0x3f) |
| 1725 |
|
|
spr_dma_on &= ~mask; |
| 1726 |
|
|
} |
| 1727 |
|
|
|
| 1728 |
|
|
matrix_access(); |
| 1729 |
|
|
break; |
| 1730 |
|
|
|
| 1731 |
|
|
// Graphics and matrix access, turn off border in 40 column mode, display window starts here |
| 1732 |
|
|
case 17: |
| 1733 |
|
|
if (ctrl2 & 8) { |
| 1734 |
|
|
if (raster_y == dy_stop) |
| 1735 |
|
|
ud_border_on = true; |
| 1736 |
|
|
else { |
| 1737 |
|
|
if (ctrl1 & 0x10) { |
| 1738 |
|
|
if (raster_y == dy_start) |
| 1739 |
|
|
border_on = ud_border_on = false; |
| 1740 |
|
|
else |
| 1741 |
|
|
if (!ud_border_on) |
| 1742 |
|
|
border_on = false; |
| 1743 |
|
|
} else |
| 1744 |
|
|
if (!ud_border_on) |
| 1745 |
|
|
border_on = false; |
| 1746 |
|
|
} |
| 1747 |
|
|
} |
| 1748 |
|
|
|
| 1749 |
|
|
// Second sample of border state |
| 1750 |
|
|
border_on_sample[1] = border_on; |
| 1751 |
|
|
|
| 1752 |
|
|
draw_background(); |
| 1753 |
|
|
draw_graphics(); |
| 1754 |
|
|
SampleBorder; |
| 1755 |
|
|
graphics_access(); |
| 1756 |
|
|
FetchIfBadLine; |
| 1757 |
|
|
matrix_access(); |
| 1758 |
|
|
break; |
| 1759 |
|
|
|
| 1760 |
|
|
// Turn off border in 38 column mode |
| 1761 |
|
|
case 18: |
| 1762 |
|
|
if (!(ctrl2 & 8)) { |
| 1763 |
|
|
if (raster_y == dy_stop) |
| 1764 |
|
|
ud_border_on = true; |
| 1765 |
|
|
else { |
| 1766 |
|
|
if (ctrl1 & 0x10) { |
| 1767 |
|
|
if (raster_y == dy_start) |
| 1768 |
|
|
border_on = ud_border_on = false; |
| 1769 |
|
|
else |
| 1770 |
|
|
if (!ud_border_on) |
| 1771 |
|
|
border_on = false; |
| 1772 |
|
|
} else |
| 1773 |
|
|
if (!ud_border_on) |
| 1774 |
|
|
border_on = false; |
| 1775 |
|
|
} |
| 1776 |
|
|
} |
| 1777 |
|
|
|
| 1778 |
|
|
// Third sample of border state |
| 1779 |
|
|
border_on_sample[2] = border_on; |
| 1780 |
|
|
|
| 1781 |
|
|
// Falls through |
| 1782 |
|
|
|
| 1783 |
|
|
// Graphics and matrix access |
| 1784 |
|
|
case 19: case 20: case 21: case 22: case 23: case 24: |
| 1785 |
|
|
case 25: case 26: case 27: case 28: case 29: case 30: |
| 1786 |
|
|
case 31: case 32: case 33: case 34: case 35: case 36: |
| 1787 |
|
|
case 37: case 38: case 39: case 40: case 41: case 42: |
| 1788 |
|
|
case 43: case 44: case 45: case 46: case 47: case 48: |
| 1789 |
|
|
case 49: case 50: case 51: case 52: case 53: case 54: // Gnagna... |
| 1790 |
|
|
draw_graphics(); |
| 1791 |
|
|
SampleBorder; |
| 1792 |
|
|
graphics_access(); |
| 1793 |
|
|
FetchIfBadLine; |
| 1794 |
|
|
matrix_access(); |
| 1795 |
|
|
last_char_data = char_data; |
| 1796 |
|
|
break; |
| 1797 |
|
|
|
| 1798 |
|
|
// Last graphics access, turn off matrix access, turn on sprite DMA if Y coordinate is |
| 1799 |
|
|
// right and sprite is enabled, handle sprite y expansion, set BA for sprite 0 |
| 1800 |
|
|
case 55: |
| 1801 |
|
|
draw_graphics(); |
| 1802 |
|
|
SampleBorder; |
| 1803 |
|
|
graphics_access(); |
| 1804 |
|
|
DisplayIfBadLine; |
| 1805 |
|
|
|
| 1806 |
|
|
// Invert y expansion flipflop if bit in MYE is set |
| 1807 |
|
|
mask = 1; |
| 1808 |
|
|
for (i=0; i<8; i++, mask<<=1) |
| 1809 |
|
|
if (mye & mask) |
| 1810 |
|
|
spr_exp_y ^= mask; |
| 1811 |
|
|
CheckSpriteDMA; |
| 1812 |
|
|
|
| 1813 |
|
|
if (spr_dma_on & 0x01) { // Don't remove these braces! |
| 1814 |
|
|
SetBALow; |
| 1815 |
|
|
} else |
| 1816 |
|
|
the_cpu->BALow = false; |
| 1817 |
|
|
break; |
| 1818 |
|
|
|
| 1819 |
|
|
// Turn on border in 38 column mode, turn on sprite DMA if Y coordinate is right and |
| 1820 |
|
|
// sprite is enabled, set BA for sprite 0, display window ends here |
| 1821 |
|
|
case 56: |
| 1822 |
|
|
if (!(ctrl2 & 8)) |
| 1823 |
|
|
border_on = true; |
| 1824 |
|
|
|
| 1825 |
|
|
// Fourth sample of border state |
| 1826 |
|
|
border_on_sample[3] = border_on; |
| 1827 |
|
|
|
| 1828 |
|
|
draw_graphics(); |
| 1829 |
|
|
SampleBorder; |
| 1830 |
|
|
IdleAccess; |
| 1831 |
|
|
DisplayIfBadLine; |
| 1832 |
|
|
CheckSpriteDMA; |
| 1833 |
|
|
|
| 1834 |
|
|
if (spr_dma_on & 0x01) |
| 1835 |
|
|
SetBALow; |
| 1836 |
|
|
break; |
| 1837 |
|
|
|
| 1838 |
|
|
// Turn on border in 40 column mode, set BA for sprite 1, paint sprites |
| 1839 |
|
|
case 57: |
| 1840 |
|
|
if (ctrl2 & 8) |
| 1841 |
|
|
border_on = true; |
| 1842 |
|
|
|
| 1843 |
|
|
// Fifth sample of border state |
| 1844 |
|
|
border_on_sample[4] = border_on; |
| 1845 |
|
|
|
| 1846 |
|
|
// Sample spr_disp_on and spr_data for sprite drawing |
| 1847 |
cebix |
1.3 |
if ((spr_draw = spr_disp_on) != 0) |
| 1848 |
cebix |
1.1 |
memcpy(spr_draw_data, spr_data, 8*4); |
| 1849 |
|
|
|
| 1850 |
|
|
// Turn off sprite display if DMA is off |
| 1851 |
|
|
mask = 1; |
| 1852 |
|
|
for (i=0; i<8; i++, mask<<=1) |
| 1853 |
|
|
if ((spr_disp_on & mask) && !(spr_dma_on & mask)) |
| 1854 |
|
|
spr_disp_on &= ~mask; |
| 1855 |
|
|
|
| 1856 |
|
|
draw_background(); |
| 1857 |
|
|
SampleBorder; |
| 1858 |
|
|
IdleAccess; |
| 1859 |
|
|
DisplayIfBadLine; |
| 1860 |
|
|
if (spr_dma_on & 0x02) |
| 1861 |
|
|
SetBALow; |
| 1862 |
|
|
break; |
| 1863 |
|
|
|
| 1864 |
|
|
// Fetch sprite pointer 0, mc_base->mc, turn on sprite display if necessary, |
| 1865 |
|
|
// turn off display if RC=7, read data of sprite 0 |
| 1866 |
|
|
case 58: |
| 1867 |
|
|
draw_background(); |
| 1868 |
|
|
SampleBorder; |
| 1869 |
|
|
|
| 1870 |
|
|
mask = 1; |
| 1871 |
|
|
for (i=0; i<8; i++, mask<<=1) { |
| 1872 |
|
|
mc[i] = mc_base[i]; |
| 1873 |
|
|
if ((spr_dma_on & mask) && (raster_y & 0xff) == my[i]) |
| 1874 |
|
|
spr_disp_on |= mask; |
| 1875 |
|
|
} |
| 1876 |
|
|
SprPtrAccess(0); |
| 1877 |
|
|
SprDataAccess(0, 0); |
| 1878 |
|
|
|
| 1879 |
|
|
if (rc == 7) { |
| 1880 |
|
|
vc_base = vc; |
| 1881 |
|
|
display_state = false; |
| 1882 |
|
|
} |
| 1883 |
|
|
if (is_bad_line || display_state) { |
| 1884 |
|
|
display_state = true; |
| 1885 |
|
|
rc = (rc + 1) & 7; |
| 1886 |
|
|
} |
| 1887 |
|
|
break; |
| 1888 |
|
|
|
| 1889 |
|
|
// Set BA for sprite 2, read data of sprite 0 |
| 1890 |
|
|
case 59: |
| 1891 |
|
|
draw_background(); |
| 1892 |
|
|
SampleBorder; |
| 1893 |
|
|
SprDataAccess(0, 1); |
| 1894 |
|
|
SprDataAccess(0, 2); |
| 1895 |
|
|
DisplayIfBadLine; |
| 1896 |
|
|
if (spr_dma_on & 0x04) |
| 1897 |
|
|
SetBALow; |
| 1898 |
|
|
break; |
| 1899 |
|
|
|
| 1900 |
|
|
// Fetch sprite pointer 1, reset BA if sprite 1 and 2 off, graphics display ends here |
| 1901 |
|
|
case 60: |
| 1902 |
|
|
draw_background(); |
| 1903 |
|
|
SampleBorder; |
| 1904 |
|
|
|
| 1905 |
|
|
if (draw_this_line) { |
| 1906 |
|
|
|
| 1907 |
|
|
// Draw sprites |
| 1908 |
|
|
if (spr_draw && ThePrefs.SpritesOn) |
| 1909 |
|
|
draw_sprites(); |
| 1910 |
|
|
|
| 1911 |
|
|
// Draw border |
| 1912 |
|
|
#ifdef __POWERPC__ |
| 1913 |
|
|
if (border_on_sample[0]) |
| 1914 |
|
|
for (i=0; i<4; i++) |
| 1915 |
|
|
memset8((uint8 *)chunky_tmp+i*8, border_color_sample[i]); |
| 1916 |
|
|
if (border_on_sample[1]) |
| 1917 |
|
|
memset8((uint8 *)chunky_tmp+4*8, border_color_sample[4]); |
| 1918 |
|
|
if (border_on_sample[2]) |
| 1919 |
|
|
for (i=5; i<43; i++) |
| 1920 |
|
|
memset8((uint8 *)chunky_tmp+i*8, border_color_sample[i]); |
| 1921 |
|
|
if (border_on_sample[3]) |
| 1922 |
|
|
memset8((uint8 *)chunky_tmp+43*8, border_color_sample[43]); |
| 1923 |
|
|
if (border_on_sample[4]) |
| 1924 |
|
|
for (i=44; i<DISPLAY_X/8; i++) |
| 1925 |
|
|
memset8((uint8 *)chunky_tmp+i*8, border_color_sample[i]); |
| 1926 |
|
|
#else |
| 1927 |
|
|
if (border_on_sample[0]) |
| 1928 |
|
|
for (i=0; i<4; i++) |
| 1929 |
|
|
memset8(chunky_line_start+i*8, border_color_sample[i]); |
| 1930 |
|
|
if (border_on_sample[1]) |
| 1931 |
|
|
memset8(chunky_line_start+4*8, border_color_sample[4]); |
| 1932 |
|
|
if (border_on_sample[2]) |
| 1933 |
|
|
for (i=5; i<43; i++) |
| 1934 |
|
|
memset8(chunky_line_start+i*8, border_color_sample[i]); |
| 1935 |
|
|
if (border_on_sample[3]) |
| 1936 |
|
|
memset8(chunky_line_start+43*8, border_color_sample[43]); |
| 1937 |
|
|
if (border_on_sample[4]) |
| 1938 |
|
|
for (i=44; i<DISPLAY_X/8; i++) |
| 1939 |
|
|
memset8(chunky_line_start+i*8, border_color_sample[i]); |
| 1940 |
|
|
#endif |
| 1941 |
|
|
|
| 1942 |
|
|
#ifdef __POWERPC__ |
| 1943 |
|
|
// Copy temporary buffer to bitmap |
| 1944 |
|
|
fastcopy(chunky_line_start, (uint8 *)chunky_tmp); |
| 1945 |
|
|
#endif |
| 1946 |
|
|
|
| 1947 |
|
|
// Increment pointer in chunky buffer |
| 1948 |
|
|
chunky_line_start += xmod; |
| 1949 |
|
|
} |
| 1950 |
|
|
|
| 1951 |
|
|
SprPtrAccess(1); |
| 1952 |
|
|
SprDataAccess(1, 0); |
| 1953 |
|
|
DisplayIfBadLine; |
| 1954 |
|
|
if (!(spr_dma_on & 0x06)) |
| 1955 |
|
|
the_cpu->BALow = false; |
| 1956 |
|
|
break; |
| 1957 |
|
|
|
| 1958 |
|
|
// Set BA for sprite 3, read data of sprite 1 |
| 1959 |
|
|
case 61: |
| 1960 |
|
|
SprDataAccess(1, 1); |
| 1961 |
|
|
SprDataAccess(1, 2); |
| 1962 |
|
|
DisplayIfBadLine; |
| 1963 |
|
|
if (spr_dma_on & 0x08) |
| 1964 |
|
|
SetBALow; |
| 1965 |
|
|
break; |
| 1966 |
|
|
|
| 1967 |
|
|
// Read sprite pointer 2, reset BA if sprite 2 and 3 off, read data of sprite 2 |
| 1968 |
|
|
case 62: |
| 1969 |
|
|
SprPtrAccess(2); |
| 1970 |
|
|
SprDataAccess(2, 0); |
| 1971 |
|
|
DisplayIfBadLine; |
| 1972 |
|
|
if (!(spr_dma_on & 0x0c)) |
| 1973 |
|
|
the_cpu->BALow = false; |
| 1974 |
|
|
break; |
| 1975 |
|
|
|
| 1976 |
|
|
// Set BA for sprite 4, read data of sprite 2 |
| 1977 |
|
|
case 63: |
| 1978 |
|
|
SprDataAccess(2, 1); |
| 1979 |
|
|
SprDataAccess(2, 2); |
| 1980 |
|
|
DisplayIfBadLine; |
| 1981 |
|
|
|
| 1982 |
|
|
if (raster_y == dy_stop) |
| 1983 |
|
|
ud_border_on = true; |
| 1984 |
|
|
else |
| 1985 |
|
|
if (ctrl1 & 0x10 && raster_y == dy_start) |
| 1986 |
|
|
ud_border_on = false; |
| 1987 |
|
|
|
| 1988 |
|
|
if (spr_dma_on & 0x10) |
| 1989 |
|
|
SetBALow; |
| 1990 |
|
|
|
| 1991 |
|
|
// Last cycle |
| 1992 |
|
|
raster_x += 8; |
| 1993 |
|
|
cycle = 1; |
| 1994 |
|
|
return true; |
| 1995 |
|
|
} |
| 1996 |
|
|
|
| 1997 |
|
|
// Next cycle |
| 1998 |
|
|
raster_x += 8; |
| 1999 |
|
|
cycle++; |
| 2000 |
|
|
return false; |
| 2001 |
|
|
} |
