mirror of
https://github.com/toyoshim/Applerm-II.git
synced 2024-06-12 14:29:27 +00:00
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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static uint8_t mem[0x10000];
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extern uint32_t cpu6502_pc;
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void prn(int c) {
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uint8_t fp;
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__asm__("movs %0, r12": "=r"(fp));
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fprintf(stderr, "### $%02x ###\n", c);
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fflush(stderr);
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__asm__("movs r12, %0":: "r"(fp));
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}
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void cpu6502_dump(
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uint16_t pc, uint8_t a, uint8_t x, uint8_t y, uint8_t sp, uint8_t sr) {
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uint8_t fp;
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__asm__("movs %0, r12": "=r"(fp));
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fprintf(stderr, "*** dump *** PC=$%04x A=$%02x X=$%02x Y=$%02x SP=$%02x "
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"NV-B_DIZC=%d%d-%d_%d%d%d%d\n",
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pc, a, x, y, sp, (sr >> 7) & 1, (sr >> 6) & 1, (sr >> 4) & 1,
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(sr >> 3) & 1, (sr >> 2) & 1, (sr >> 1) & 1, sr & 1);
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fflush(stderr);
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__asm__("movs r12, %0":: "r"(fp));
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}
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uint8_t cpu6502_load(uint16_t addr) {
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uint8_t fp;
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uint8_t result = 0;
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__asm__("movs %0, r12": "=r"(fp));
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result = mem[addr];
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fprintf(stderr, "load $%04x => $%02x\n", addr, result);
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fflush(stderr);
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__asm__("movs r12, %0":: "r"(fp));
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return result;
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}
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void cpu6502_store(uint16_t addr, uint8_t data) {
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uint8_t fp;
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__asm__("movs %0, r12": "=r"(fp));
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mem[addr] = data;
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fprintf(stderr, "store $%04x <= $%02x\n", addr, data);
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fflush(stderr);
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__asm__("movs r12, %0":: "r"(fp));
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}
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int main(int argc, char** argv) {
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FILE* fp = fopen("6502_functional_test.bin", "rb");
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fread(mem, 1, 0x10000, fp);
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fclose(fp);
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cpu6502_reset();
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cpu6502_pc = 0x400;
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fprintf(stderr, "quit: $%04x\n", cpu6502_run());
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return 0;
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}
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