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/*
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* VIC_SC.cpp - 6569R5 emulation (cycle based)
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*
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* Frodo Copyright (C) Christian Bauer
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*
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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;
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color_ram = Color;
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#endif
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matrix_base = 0;
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char_base = 0;
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bitmap_base = 0;
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// Get bitmap info
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chunky_ptr = chunky_line_start = disp->BitmapBase();
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xmod = disp->BitmapXMod();
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// Initialize VIC registers
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mx8 = 0;
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ctrl1 = ctrl2 = 0;
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lpx = lpy = 0;
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me = mxe = mye = mdp = mmc = 0;
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vbase = irq_flag = irq_mask = 0;
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clx_spr = clx_bgr = 0;
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cia_vabase = 0;
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ec = b0c = b1c = b2c = b3c = mm0 = mm1 = 0;
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for (i=0; i<8; i++) mx[i] = my[i] = sc[i] = 0;
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// Initialize other variables
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raster_y = TOTAL_RASTERS - 1;
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rc = 7;
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irq_raster = vc = vc_base = x_scroll = y_scroll = 0;
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dy_start = ROW24_YSTART;
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dy_stop = ROW24_YSTOP;
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ml_index = 0;
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cycle = 1;
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display_idx = 0;
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display_state = false;
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border_on = ud_border_on = vblanking = false;
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lp_triggered = draw_this_line = false;
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is_bad_line = false;
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spr_exp_y = spr_dma_on = spr_disp_on = 0;
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for (i=0; i<8; i++) {
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mc[i] = 63;
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mc_base[i] = 0;
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spr_ptr[i] = 0;
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}
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frame_skipped = false;
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skip_counter = 1;
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memset(spr_coll_buf, 0, 0x180);
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memset(fore_mask_buf, 0, 0x180/8);
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// Preset colors to black
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disp->InitColors(colors);
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ec_color = b0c_color = b1c_color = b2c_color = b3c_color = mm0_color = mm1_color = colors[0];
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for (i=0; i<8; i++) spr_color[i] = colors[0];
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}
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/*
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* Reinitialize the colors table for when the palette has changed
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*/
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|
| 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 |
for (i=0; i<16; i++)
|
| 323 |
xlate_colors[colors[i]] = i;
|
| 324 |
|
| 325 |
// Get the new colors.
|
| 326 |
the_display->InitColors(colors);
|
| 327 |
|
| 328 |
// Build color translation table.
|
| 329 |
for (i=0; i<256; i++)
|
| 330 |
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 |
for (i=0; i<8; i++)
|
| 341 |
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 |
for (int y=0; y<DISPLAY_Y; y++) {
|
| 350 |
for (int x=0; x<DISPLAY_X; x++)
|
| 351 |
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 |
if (raster_y == TOTAL_RASTERS-1) {
|
| 1520 |
|
| 1521 |
// Trigger VBlank in cycle 2
|
| 1522 |
vblanking = true;
|
| 1523 |
|
| 1524 |
} else {
|
| 1525 |
|
| 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 |
if ((spr_draw = spr_disp_on) != 0)
|
| 1848 |
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 |
}
|
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| 
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