ewm/ewm.c
2016-11-16 21:05:31 -05:00

136 lines
4.0 KiB
C

// The MIT License (MIT)
//
// Copyright (c) 2015 Stefan Arentz - http://github.com/st3fan/ewm
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <getopt.h>
#include <string.h>
#include "cpu.h"
#include "mem.h"
#include "pia.h"
// Apple 1 / 8K RAM / WOZ Monitor
static int setup_apple1(struct cpu_t *cpu) {
struct pia_t *pia = malloc(sizeof(struct pia_t));
pia_init(pia);
pia_trace(pia, 0);
cpu_add_ram(cpu, 0x0000, 8 * 1024);
cpu_add_rom_file(cpu, 0xff00, "roms/apple1.com");
cpu_add_iom(cpu, EWM_A1_PIA6820_ADDR, EWM_A1_PIA6820_LENGTH, pia, pia_read, pia_write);
return 0;
}
// Replica 1 / 32K RAM / Krusader Assembler & Monitor
static int setup_replica1(struct cpu_t *cpu) {
struct pia_t *pia = malloc(sizeof(struct pia_t));
pia_init(pia);
pia_trace(pia, 0);
cpu_add_ram(cpu, 0x0000, 32 * 1024);
cpu_add_rom_file(cpu, 0xe000, "roms/krusader.rom");
cpu_add_iom(cpu, EWM_A1_PIA6820_ADDR, EWM_A1_PIA6820_LENGTH, pia, pia_read, pia_write);
return 0;
}
// Apple ][+ / 48K RAM / Original ROMs
static int setup_apple2plus(struct cpu_t *cpu) {
cpu_add_ram(cpu, 0x0000, 48 * 1024);
cpu_add_rom_file(cpu, 0xd000, "roms/a2p.rom");
return 0;
}
// Machine Setup
typedef int (*ewm_machine_setup_f)(struct cpu_t *cpu);
struct ewm_machine_t {
char *name;
char *description;
ewm_machine_setup_f setup;
};
static struct ewm_machine_t machines[] = {
{ "apple1", "Apple 1", setup_apple1 },
{ "replica1", "Replica 1", setup_replica1 },
{ "apple2plus", "Apple ][+", setup_apple2plus },
{ NULL, NULL, NULL }
};
static struct option options[] = {
{ "machine", required_argument, NULL, 'm' },
{ NULL, 0, NULL, 0 }
};
static struct ewm_machine_t *machine_with_name(char *name) {
for (struct ewm_machine_t *m = machines; m->name != NULL; m++) {
if (strcmp(m->name, name) == 0) {
return m;
}
}
return NULL;
}
int main(int argc, char **argv) {
struct ewm_machine_t *machine = NULL;
char ch;
while ((ch = getopt_long(argc, argv, "m:", options, NULL)) != -1) {
switch (ch) {
case 'm':
machine = machine_with_name(optarg);
break;
}
}
argc -= optind;
argv += optind;
if (machine == NULL) {
fprintf(stderr, "Usage: ewm --machine apple1|replica1|apple2plus\n");
exit(1);
}
struct cpu_t cpu;
cpu_init(&cpu);
(void) setup_replica1(&cpu);
switch (cpu_boot(&cpu)) {
case EWM_CPU_ERR_UNIMPLEMENTED_INSTRUCTION:
fprintf(stderr, "CPU: Exited because of unimplemented instructions 0x%.2x at 0x%.4x\n",
mem_get_byte(&cpu, cpu.state.pc), cpu.state.pc);
break;
case EWM_CPU_ERR_STACK_OVERFLOW:
fprintf(stderr, "CPU: Exited because of stack overflow at 0x%.4x\n", cpu.state.pc);
break;
case EWM_CPU_ERR_STACK_UNDERFLOW:
fprintf(stderr, "CPU: Exited because of stack underflow at 0x%.4x\n", cpu.state.pc);
break;
}
return 0;
}