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/* |
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* VIC_SC.cpp - 6569R5 emulation (cycle based) |
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* |
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* Frodo (C) 1994-1997,2002 Christian Bauer |
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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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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_dma_on = spr_disp_on = 0; |
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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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// Build inverse color table. |
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uint8 xlate_colors[256]; |
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memset(xlate_colors, 0, sizeof(xlate_colors)); |
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for (i = 0; i < 16; i++) |
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for (i=0; i<16; i++) |
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xlate_colors[colors[i]] = i; |
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// Get the new colors. |
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the_display->InitColors(colors); |
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// Build color translation table. |
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for (i = 0; i < 256; i++) |
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for (i=0; i<256; i++) |
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xlate_colors[i] = colors[xlate_colors[i]]; |
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// Translate all the old colors variables. |
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b3c_color = colors[b3c]; |
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mm0_color = colors[mm0]; |
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mm1_color = colors[mm1]; |
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for (i = 0; i < 8; i++) |
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for (i=0; i<8; i++) |
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spr_color[i] = colors[sc[i]]; |
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// Translate the border color sample buffer. |
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// Translate the chunky buffer. |
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uint8 *scanline = the_display->BitmapBase(); |
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for (int y = 0; y < DISPLAY_Y; y++) { |
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for (int x = 0; x < DISPLAY_X; x++) |
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for (int y=0; y<DISPLAY_Y; y++) { |
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for (int x=0; x<DISPLAY_X; x++) |
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scanline[x] = xlate_colors[scanline[x]]; |
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scanline += xmod; |
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} |
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// Fetch sprite pointer 3, increment raster counter, trigger raster IRQ, |
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// test for Bad Line, reset BA if sprites 3 and 4 off, read data of sprite 3 |
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case 1: |
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if (raster_y == TOTAL_RASTERS-1) |
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if (raster_y == TOTAL_RASTERS-1) { |
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// Trigger VBlank in cycle 2 |
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vblanking = true; |
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else { |
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} else { |
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// Increment raster counter |
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raster_y++; |
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border_on_sample[4] = border_on; |
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// Sample spr_disp_on and spr_data for sprite drawing |
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if ((spr_draw = spr_disp_on)) |
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if ((spr_draw = spr_disp_on) != 0) |
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memcpy(spr_draw_data, spr_data, 8*4); |
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// Turn off sprite display if DMA is off |
