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https://github.com/RyuKojiro/apple1.git
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git-svn-id: svn+ssh://svn.phoenixbox.net/svn/apple1/trunk@4 64f78de7-aa59-e511-a0e8-0002a5492df0
72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
//
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// main.c
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// apple1
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//
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// Created by Daniel Loffgren on 9/12/15.
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// Copyright (c) 2015 Daniel Loffgren. All rights reserved.
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//
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#include <v6502/cpu.h>
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#include <v6502/mem.h>
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#include <stdio.h>
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#define ROM_START 0xF000
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#define ROM_SIZE 0x00FF
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void fault(void *ctx, const char *e) {
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(*(int *)ctx)++;
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}
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static void loadRomFile(v6502_memory *mem, const char *fname, uint16_t address) {
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FILE *f = fopen(fname, "r");
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if (!f) {
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fprintf(stderr, "Could not read from \"%s\"!\n", fname);
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return;
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}
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uint8_t byte;
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uint16_t offset = 0;
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while (fread(&byte, 1, 1, f)) {
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mem->bytes[address + (offset++)] = byte;
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}
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printf("Loaded %u bytes at 0x%x.\n", offset, address);
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fclose(f);
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}
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uint8_t romMirrorCallback(struct _v6502_memory *memory, uint16_t offset, int trap, void *context) {
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return memory->bytes[offset % ROM_SIZE];
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}
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int main(int argc, const char * argv[])
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{
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int faulted = 0;
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v6502_cpu *cpu = v6502_createCPU();
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cpu->memory = v6502_createMemory(0xFFFF);
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cpu->fault_callback = fault;
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cpu->fault_context = &faulted;
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// Load Woz Monitor
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loadRomFile(cpu->memory, "apple1.rom", ROM_START);
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for (uint16_t start = ROM_START + ROM_SIZE + 1;
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start < v6502_memoryStartCeiling && start > ROM_START;
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start += ROM_SIZE + 1) {
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v6502_map(cpu->memory, start, ROM_SIZE, romMirrorCallback, NULL, NULL);
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}
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v6502_reset(cpu);
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while (!faulted) {
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v6502_step(cpu);
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}
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v6502_destroyMemory(cpu->memory);
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v6502_destroyCPU(cpu);
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}
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