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72 lines
2.3 KiB
C
72 lines
2.3 KiB
C
// The MIT License (MIT)
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//
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// Copyright (c) 2020 Stefan Arentz - http://github.com/st3fan/ewm
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#include <stdint.h>
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#include <stdio.h>
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#include "fmt.h"
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#include "cpu.h"
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#include "mem.h"
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//
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// This implements the "Doing something more interactive with it" part of the code golf at
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// https://codegolf.stackexchange.com/questions/12844/emulate-a-mos-6502-cpu
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//
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uint8_t input_handler(struct cpu_t *cpu, struct mem_t *mem, uint16_t addr) {
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return 0;
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}
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void output_handler(struct cpu_t *cpu, struct mem_t *mem, uint16_t addr, uint8_t b) {
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printf("Hello\n");
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if (addr == 0xf001) {
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printf("Got: %c\n", b);
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}
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}
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int main() {
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struct cpu_t *cpu = cpu_create(EWM_CPU_MODEL_6502);
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cpu_add_ram(cpu, 0x0000, 0xbfff);
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cpu_add_ram_file(cpu, 0xc000, "rom/ehbasic.bin");
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cpu_add_iom(cpu, 0xf000, 0xf0ff, NULL, input_handler, output_handler);
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cpu_reset(cpu);
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cpu->state.pc = 0xc000;
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while (true) {
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char state[1024];
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cpu_format_state(cpu, state);
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char ins[1024];
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cpu_format_instruction(cpu, ins);
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printf("%.4X: %s %s\n", cpu->state.pc, state, ins);
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int ret = cpu_step(cpu);
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if (ret < 0) {
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fprintf(stderr, "Unexpected error %d\n", ret);
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return 1;
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}
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}
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return 0;
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}
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