59 lines
1.0 KiB
C++
59 lines
1.0 KiB
C++
#include <stdio.h>
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#include <stdlib.h>
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typedef unsigned short u16;
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u16 reg_in[32], reg_out[1000][32];
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inline u16 swap16(u16 s) {
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return (s >> 8) | (s << 8);
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}
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void printRegs(u16 *lastRegs, u16 *regs) {
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for (int i = 0; i < 32; i++) {
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if (! lastRegs || lastRegs[i] != regs[i]) {
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printf("%02x %04x ", i, swap16(regs[i]));
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} else {
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printf(" ");
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}
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if ((i+1) % 8 == 0)
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printf("\n");
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}
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}
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int main(int argc, char **argv) {
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if (argc != 2) {
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fprintf(stderr, "Usage %s: <filename>\n", argv[0]);
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exit(1);
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}
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FILE *f = fopen(argv[1], "rb");
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int steps;
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if (f) {
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// read initial regs
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fread(reg_in, 1, 32 * 2, f);
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// read initial regs (guess number of steps)
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steps = fread(reg_out, 32 * 2, 1000, f);
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fclose(f);
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} else {
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fprintf(stderr, "Error opening file %s\n", argv[1]);
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exit(1);
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}
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printf("Start with:\n");
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printRegs(NULL, reg_in);
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printf("\nStep 0:\n");
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printRegs(reg_in, reg_out[0]);
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for (int i=1;i < steps;i++) {
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printf("\nStep %d:\n", i);
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printRegs(reg_out[i-1], reg_out[i]);
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}
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exit(0);
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}
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