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annotate testgst.c @ 455:be9c7b3e25ee

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Added analysis script used for investigating direct color DMA timing
author Mike Pavone <pavone@retrodev.com>
date Mon, 02 Sep 2013 01:03:08 -0700
parents b7c3b2d22858
children 140af5509ce7
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1 #include "gst.h"
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2 #include <string.h>
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3 #include <stdlib.h>
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4
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5 uint8_t busreq;
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6 uint8_t reset;
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7
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8 int32_t color_map[1 << 12];
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9
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10 void latch_mode(vdp_context * context)
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11 {
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12 }
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13 void ym_data_write(ym2612_context * context, uint8_t value)
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14 {
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15 if (context->selected_reg >= YM_REG_END) {
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16 return;
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17 }
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18 if (context->selected_part) {
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19 if (context->selected_reg < YM_PART2_START) {
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20 return;
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21 }
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22 context->part2_regs[context->selected_reg - YM_PART2_START] = value;
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23 } else {
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24 if (context->selected_reg < YM_PART1_START) {
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25 return;
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26 }
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27 context->part1_regs[context->selected_reg - YM_PART1_START] = value;
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28 }
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29 }
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30
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31 void ym_address_write_part1(ym2612_context * context, uint8_t address)
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32 {
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33 //printf("address_write_part1: %X\n", address);
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34 context->selected_reg = address;
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35 context->selected_part = 0;
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36 }
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37
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38 void ym_address_write_part2(ym2612_context * context, uint8_t address)
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39 {
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40 //printf("address_write_part2: %X\n", address);
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41 context->selected_reg = address;
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42 context->selected_part = 1;
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43 }
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44
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45 uint16_t ram[64*1024];
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46 uint8_t zram[8*1024];
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47
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48
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49 int main(int argc, char ** argv)
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50 {
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51 vdp_context vdp;
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52 ym2612_context ym;
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53 psg_context psg;
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54 m68k_context m68k;
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55 z80_context z80;
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56 genesis_context gen;
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57 if (argc < 3) {
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58 fputs("Usage: testgst infile outfile\n", stderr);
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59 return 1;
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60 }
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61 memset(&gen, 0, sizeof(gen));
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62 memset(&m68k, 0, sizeof(m68k));
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63 memset(&z80, 0, sizeof(z80));
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64 memset(&ym, 0, sizeof(ym));
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65 memset(&vdp, 0, sizeof(vdp));
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66 memset(&psg, 0, sizeof(psg));
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67 m68k.mem_pointers[1] = ram;
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68 z80.mem_pointers[0] = zram;
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69 vdp.vdpmem = malloc(VRAM_SIZE);
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70 gen.vdp = &vdp;
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71 gen.ym = &ym;
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72 gen.psg = &psg;
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73 gen.m68k = &m68k;
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74 gen.z80 = &z80;
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75 uint32_t pc = load_gst(&gen, argv[1]);
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76 save_gst(&gen, argv[2], pc);
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77 return 0;
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78 }