mirror of https://github.com/hsoft/collapseos.git
61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
#include <stdint.h>
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#include <stdio.h>
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#include "../libz80/z80.h"
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/* runbin loads binary from stdin directly in memory address 0 then runs it
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* until it halts. The return code is the value of the register A at halt time.
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*/
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static Z80Context cpu;
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static uint8_t mem[0x10000];
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static uint8_t io_read(int unused, uint16_t addr)
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{
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addr &= 0xff;
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fprintf(stderr, "Out of bounds I/O read: %d\n", addr);
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return 0;
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}
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static void io_write(int unused, uint16_t addr, uint8_t val)
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{
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addr &= 0xff;
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fprintf(stderr, "Out of bounds I/O write: %d / %d\n", addr, val);
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}
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static uint8_t mem_read(int unused, uint16_t addr)
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{
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return mem[addr];
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}
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static void mem_write(int unused, uint16_t addr, uint8_t val)
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{
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mem[addr] = val;
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}
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int main()
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{
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// read stdin in mem
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int i = 0;
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int c = getchar();
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while (c != EOF) {
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mem[i] = c & 0xff;
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i++;
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c = getchar();
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}
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if (!i) {
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fprintf(stderr, "No input, aborting\n");
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return 1;
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}
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Z80RESET(&cpu);
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cpu.ioRead = io_read;
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cpu.ioWrite = io_write;
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cpu.memRead = mem_read;
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cpu.memWrite = mem_write;
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while (!cpu.halted) {
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Z80Execute(&cpu);
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}
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return cpu.R1.br.A;
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}
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