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annotate dis.c @ 2:5df303bf72e6

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Improve 68K instruction decoding. Add simple disassembler.
author Mike Pavone <pavone@retrodev.com>
date Sat, 03 Nov 2012 21:38:28 -0700
parents
children 23b83d94c633
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5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
Mike Pavone <pavone@retrodev.com>
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1 #include "68kinst.h"
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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2 #include <stdio.h>
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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3 #include <stdlib.h>
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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4
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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5 int main(int argc, char ** argv)
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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6 {
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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7 long filesize;
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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8 unsigned short *filebuf;
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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9 char disbuf[1024];
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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10 m68kinst instbuf;
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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11 unsigned short * cur;
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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12 FILE * f = fopen(argv[1], "rb");
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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13 fseek(f, 0, SEEK_END);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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14 filesize = ftell(f);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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15 fseek(f, 0, SEEK_SET);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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16 filebuf = malloc(filesize);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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17 fread(filebuf, 2, filesize/2, f);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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18 fclose(f);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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19 for(cur = filebuf; cur - filebuf < (filesize/2); ++cur)
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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20 {
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21 //printf("%x:", *cur);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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22 *cur = (*cur >> 8) | (*cur << 8);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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23 //printf("%x\n", *cur);
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24 }
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25 for(cur = filebuf; (cur - filebuf) < (filesize/2); ++cur)
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26 {
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27 printf("cur: %p: %x\n", cur, *cur);
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28 cur = m68K_decode(cur, &instbuf);
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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29 m68k_disasm(&instbuf, disbuf);
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30 puts(disbuf);
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31 }
5df303bf72e6 Improve 68K instruction decoding. Add simple disassembler.
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32 return 0;
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33 }