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annotate testgst.c @ 2274:bf1bb893f104

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Properly ignore low bits of SP start address in disassembler
author Michael Pavone <pavone@retrodev.com>
date Thu, 29 Dec 2022 22:44:35 -0800
parents e9369d6f0101
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2 Copyright 2013 Michael Pavone
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3 This file is part of BlastEm.
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4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
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5 */
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6 #include "gst.h"
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7 #include <string.h>
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8 #include <stdlib.h>
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9
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10 uint8_t busreq;
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11 uint8_t reset;
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12
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13 void latch_mode(vdp_context * context)
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14 {
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15 }
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16 void ym_data_write(ym2612_context * context, uint8_t value)
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17 {
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18 if (context->selected_reg >= YM_REG_END) {
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19 return;
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20 }
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21 if (context->selected_part) {
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22 if (context->selected_reg < YM_PART2_START) {
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23 return;
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24 }
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25 context->part2_regs[context->selected_reg - YM_PART2_START] = value;
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26 } else {
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27 if (context->selected_reg < YM_PART1_START) {
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28 return;
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29 }
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30 context->part1_regs[context->selected_reg - YM_PART1_START] = value;
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31 }
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32 }
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33
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34 void ym_address_write_part1(ym2612_context * context, uint8_t address)
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35 {
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36 //printf("address_write_part1: %X\n", address);
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37 context->selected_reg = address;
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38 context->selected_part = 0;
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39 }
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40
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41 void ym_address_write_part2(ym2612_context * context, uint8_t address)
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42 {
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43 //printf("address_write_part2: %X\n", address);
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44 context->selected_reg = address;
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45 context->selected_part = 1;
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46 }
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47
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48 uint16_t ram[64*1024];
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49 uint8_t zram[8*1024];
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51
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52 int main(int argc, char ** argv)
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53 {
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54 vdp_context vdp;
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55 ym2612_context ym;
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56 psg_context psg;
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57 m68k_context m68k;
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58 z80_context z80;
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59 genesis_context gen;
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60 if (argc < 3) {
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61 fputs("Usage: testgst infile outfile\n", stderr);
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62 return 1;
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63 }
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64 memset(&gen, 0, sizeof(gen));
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65 memset(&m68k, 0, sizeof(m68k));
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66 memset(&z80, 0, sizeof(z80));
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67 memset(&ym, 0, sizeof(ym));
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68 memset(&vdp, 0, sizeof(vdp));
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69 memset(&psg, 0, sizeof(psg));
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70 m68k.mem_pointers[1] = ram;
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71 z80.mem_pointers[0] = zram;
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72 vdp.vdpmem = malloc(VRAM_SIZE);
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73 gen.vdp = &vdp;
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74 gen.ym = &ym;
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75 gen.psg = &psg;
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76 gen.m68k = &m68k;
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77 gen.z80 = &z80;
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78 uint32_t pc = load_gst(&gen, argv[1]);
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79 save_gst(&gen, argv[2], pc);
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80 return 0;
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81 }