56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <memory.h>
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static inline uint16_t r16(uint8_t *p) {
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uint16_t r = *p++;
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r |= *p++ << 8;
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return r;
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}
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static inline uint32_t r32(uint8_t *p) {
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uint32_t r = *p++;
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r |= *p++ << 8;
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r |= *p++ << 16;
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r |= *p++ << 24;
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return r;
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}
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int main(int argc, char **argv) {
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if (argc != 3) {
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fprintf(stderr, "Usage: %s <file> <address>\n", argv[0]);
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return -1;
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}
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FILE *f = fopen(argv[1], "rb");
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if (!f) {
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fprintf(stderr, "Couldn't open %s\n", argv[1]);
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return -1;
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}
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fseek(f, 0, SEEK_END);
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int len = ftell(f);
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fseek(f, 0, SEEK_SET);
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uint8_t *data = malloc(len);
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fread(data, 1, len, f);
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fclose(f);
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uint32_t addr = strtol(argv[2], NULL, 16);
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if (addr > len - 4) {
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fprintf(stderr, "Address is too large\n");
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return -1;
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}
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uint8_t done = 0;
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uint16_t start = r16(data + addr);
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addr += 2;
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do {
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uint32_t to = r32(data + addr); addr += 4;
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uint32_t pages = r32(data + addr); addr += 4;
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if (pages)
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printf("Address: $%02x:%04x Block #%d blocks: %d\n", to >> 16, to & 0xffff, start, pages / 2);
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start += pages / 2;
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if (pages == 0)
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done = 1;
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} while (!done);
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}
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