65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
#include <stdint.h>
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#include "libz80/z80.h"
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#include "wrapper.h"
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#include "zasm.h"
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/* zasm is a "pure memory" application. It starts up being told memory location
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* to read and memory location to write.
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*
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* This program works be writing stdin in a specific location in memory, run
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* zasm in a special wrapper, wait until we receive the stop signal, then
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* spit the contents of the dest memory to stdout.
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*/
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static Z80Context cpu;
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static uint8_t mem[0xffff];
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static int running;
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static uint8_t io_read(int unused, uint16_t addr)
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{
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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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// zasm doesn't do any IO. If we receive any IO, it means that we're done
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// because the wrapper told us through an "out"
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running = 0;
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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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// initialize memory
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int wrapperlen = sizeof(WRAPPER);
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for (int i=0; i<wrapperlen; i++) {
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mem[i] = WRAPPER[i];
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}
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int zasm = sizeof(ZASM);
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for (int i=0; i<zasm; i++) {
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mem[i+wrapperlen] = ZASM[i];
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}
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// Run!
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running = 1;
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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 (running) {
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Z80Execute(&cpu);
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}
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printf("and... %d!\n", mem[0x100]);
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return 0;
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}
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