450 lines
13 KiB
C
450 lines
13 KiB
C
#include <stdio.h>
|
|
#include <stdbool.h>
|
|
#include <stdlib.h>
|
|
#include <stddef.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <stdarg.h>
|
|
#include <sys/time.h>
|
|
#include "gb.h"
|
|
#include "memory.h"
|
|
#include "timing.h"
|
|
#include "z80_cpu.h"
|
|
#include "joypad.h"
|
|
#include "display.h"
|
|
#include "debugger.h"
|
|
|
|
static const GB_cartridge_t cart_defs[256] = {
|
|
// From http://gbdev.gg8.se/wiki/articles/The_Cartridge_Header#0147_-_Cartridge_Type
|
|
/* MBC RAM BAT. RTC RUMB. */
|
|
{ NO_MBC, false, false, false, false}, // 00h ROM ONLY
|
|
{ MBC1 , false, false, false, false}, // 01h MBC1
|
|
{ MBC1 , true , false, false, false}, // 02h MBC1+RAM
|
|
{ MBC1 , true , true , false, false}, // 03h MBC1+RAM+BATTERY
|
|
[5] =
|
|
{ MBC2 , true , false, false, false}, // 05h MBC2
|
|
{ MBC2 , true , true , false, false}, // 06h MBC2+BATTERY
|
|
[8] =
|
|
{ NO_MBC, true , false, false, false}, // 08h ROM+RAM
|
|
{ NO_MBC, true , true , false, false}, // 09h ROM+RAM+BATTERY
|
|
[0xB] =
|
|
// Todo: What are these?
|
|
{ NO_MBC, false, false, false, false}, // 0Bh MMM01
|
|
{ NO_MBC, false, false, false, false}, // 0Ch MMM01+RAM
|
|
{ NO_MBC, false, false, false, false}, // 0Dh MMM01+RAM+BATTERY
|
|
[0xF] =
|
|
{ MBC3 , false, true, true , false}, // 0Fh MBC3+TIMER+BATTERY
|
|
{ MBC3 , true , true, true , false}, // 10h MBC3+TIMER+RAM+BATTERY
|
|
{ MBC3 , false, false, false, false}, // 11h MBC3
|
|
{ MBC3 , true , false, false, false}, // 12h MBC3+RAM
|
|
{ MBC3 , true , true , false, false}, // 13h MBC3+RAM+BATTERY
|
|
[0x15] =
|
|
// Todo: Do these exist?
|
|
{ MBC4 , false, false, false, false}, // 15h MBC4
|
|
{ MBC4 , true , false, false, false}, // 16h MBC4+RAM
|
|
{ MBC4 , true , true , false, false}, // 17h MBC4+RAM+BATTERY
|
|
[0x19] =
|
|
{ MBC5 , false, false, false, false}, // 19h MBC5
|
|
{ MBC5 , true , false, false, false}, // 1Ah MBC5+RAM
|
|
{ MBC5 , true , true , false, false}, // 1Bh MBC5+RAM+BATTERY
|
|
{ MBC5 , false, false, false, true }, // 1Ch MBC5+RUMBLE
|
|
{ MBC5 , true , false, false, true }, // 1Dh MBC5+RUMBLE+RAM
|
|
{ MBC5 , true , true , false, true }, // 1Eh MBC5+RUMBLE+RAM+BATTERY
|
|
[0xFC] =
|
|
// Todo: What are these?
|
|
{ NO_MBC, false, false, false, false}, // FCh POCKET CAMERA
|
|
{ NO_MBC, false, false, false, false}, // FDh BANDAI TAMA5
|
|
{ NO_MBC, false, false, false, false}, // FEh HuC3
|
|
{ NO_MBC, true , true , false, false}, // FFh HuC1+RAM+BATTERY
|
|
};
|
|
|
|
void gb_attributed_logv(GB_gameboy_t *gb, gb_log_attributes attributes, const char *fmt, va_list args)
|
|
{
|
|
char *string = NULL;
|
|
vasprintf(&string, fmt, args);
|
|
if (string) {
|
|
if (gb->log_callback) {
|
|
gb->log_callback(gb, string, attributes);
|
|
}
|
|
else {
|
|
/* Todo: Add ANSI escape sequences for attributed text */
|
|
printf("%s", string);
|
|
}
|
|
}
|
|
free(string);
|
|
}
|
|
|
|
void gb_attributed_log(GB_gameboy_t *gb, gb_log_attributes attributes, const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
gb_attributed_logv(gb, attributes, fmt, args);
|
|
va_end(args);
|
|
}
|
|
|
|
void gb_log(GB_gameboy_t *gb,const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
gb_attributed_logv(gb, 0, fmt, args);
|
|
va_end(args);
|
|
}
|
|
|
|
static char *default_input_callback(GB_gameboy_t *gb)
|
|
{
|
|
char *expression = NULL;
|
|
size_t size = 0;
|
|
printf(">");
|
|
getline(&expression, &size, stdin);
|
|
|
|
if (!expression) {
|
|
return strdup("");
|
|
}
|
|
|
|
size_t length = strlen(expression);
|
|
if (expression[length - 1] == '\n') {
|
|
expression[length - 1] = 0;
|
|
}
|
|
return expression;
|
|
}
|
|
|
|
void gb_init(GB_gameboy_t *gb)
|
|
{
|
|
memset(gb, 0, sizeof(*gb));
|
|
gb->magic = (uintptr_t)'SAME';
|
|
gb->version = GB_STRUCT_VERSION;
|
|
gb->ram = malloc(gb->ram_size = 0x2000);
|
|
gb->vram = malloc(gb->vram_size = 0x2000);
|
|
|
|
struct timeval now;
|
|
gettimeofday(&now, NULL);
|
|
gb->last_vblank = (now.tv_usec) * 1000 + now.tv_sec * 1000000000L;;
|
|
|
|
gb->mbc_rom_bank = 1;
|
|
gb->last_rtc_second = time(NULL);
|
|
gb->last_vblank = clock();
|
|
gb->breakpoint = 0xFFFF;
|
|
gb->cgb_ram_bank = 1;
|
|
|
|
/* Todo: this bypasses the rgb encoder because it is not set yet. */
|
|
gb->sprite_palletes_rgb[4] = gb->sprite_palletes_rgb[0] = gb->background_palletes_rgb[0] = 0xFFFFFFFF;
|
|
gb->sprite_palletes_rgb[5] = gb->sprite_palletes_rgb[1] = gb->background_palletes_rgb[1] = 0xAAAAAAAA;
|
|
gb->sprite_palletes_rgb[6] = gb->sprite_palletes_rgb[2] = gb->background_palletes_rgb[2] = 0x55555555;
|
|
gb->input_callback = default_input_callback;
|
|
gb->cartridge_type = &cart_defs[0]; // Default cartridge type
|
|
}
|
|
|
|
void gb_init_cgb(GB_gameboy_t *gb)
|
|
{
|
|
memset(gb, 0, sizeof(*gb));
|
|
gb->magic = (uintptr_t)'SAME';
|
|
gb->version = GB_STRUCT_VERSION;
|
|
gb->ram = malloc(gb->ram_size = 0x2000 * 8);
|
|
gb->vram = malloc(gb->vram_size = 0x2000 * 2);
|
|
gb->is_cgb = true;
|
|
gb->cgb_mode = true;
|
|
|
|
struct timeval now;
|
|
gettimeofday(&now, NULL);
|
|
gb->last_vblank = (now.tv_usec) * 1000 + now.tv_sec * 1000000000L;
|
|
|
|
gb->mbc_rom_bank = 1;
|
|
gb->last_rtc_second = time(NULL);
|
|
gb->last_vblank = clock();
|
|
gb->breakpoint = 0xFFFF;
|
|
gb->cgb_ram_bank = 1;
|
|
gb->input_callback = default_input_callback;
|
|
gb->cartridge_type = &cart_defs[0]; // Default cartridge type
|
|
}
|
|
|
|
void gb_free(GB_gameboy_t *gb)
|
|
{
|
|
if (gb->ram) {
|
|
free(gb->ram);
|
|
}
|
|
if (gb->vram) {
|
|
free(gb->vram);
|
|
}
|
|
if (gb->mbc_ram) {
|
|
free(gb->mbc_ram);
|
|
}
|
|
if (gb->rom) {
|
|
free(gb->rom);
|
|
}
|
|
if (gb->audio_buffer) {
|
|
free(gb->audio_buffer);
|
|
}
|
|
}
|
|
|
|
int gb_load_bios(GB_gameboy_t *gb, const char *path)
|
|
{
|
|
FILE *f = fopen(path, "r");
|
|
if (!f) return errno;
|
|
fread(gb->bios, sizeof(gb->bios), 1, f);
|
|
fclose(f);
|
|
return 0;
|
|
}
|
|
|
|
int gb_load_rom(GB_gameboy_t *gb, const char *path)
|
|
{
|
|
FILE *f = fopen(path, "r");
|
|
if (!f) return errno;
|
|
fseek(f, 0, SEEK_END);
|
|
gb->rom_size = (ftell(f) + 0x3FFF) & ~0x3FFF; /* Round to bank */
|
|
fseek(f, 0, SEEK_SET);
|
|
gb->rom = malloc(gb->rom_size);
|
|
memset(gb->rom, 0xFF, gb->rom_size); /* Pad with 0xFFs */
|
|
fread(gb->rom, gb->rom_size, 1, f);
|
|
fclose(f);
|
|
gb->cartridge_type = &cart_defs[gb->rom[0x147]];
|
|
if (gb->cartridge_type->has_ram) {
|
|
static const int ram_sizes[256] = {0, 0x800, 0x2000, 0x8000, 0x20000, 0x10000};
|
|
gb->mbc_ram_size = ram_sizes[gb->rom[0x149]];
|
|
gb->mbc_ram = malloc(gb->mbc_ram_size);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Todo: we need a sane and protable save state format. */
|
|
int gb_save_state(GB_gameboy_t *gb, const char *path)
|
|
{
|
|
GB_gameboy_t save;
|
|
memcpy(&save, gb, offsetof(GB_gameboy_t, first_unsaved_data));
|
|
save.cartridge_type = NULL; // Kept from load_rom
|
|
save.rom = NULL; // Kept from load_rom
|
|
save.rom_size = 0; // Kept from load_rom
|
|
save.mbc_ram = NULL;
|
|
save.ram = NULL;
|
|
save.vram = NULL;
|
|
save.screen = NULL; // Kept from user
|
|
save.audio_buffer = NULL; // Kept from user
|
|
save.buffer_size = 0; // Kept from user
|
|
save.sample_rate = 0; // Kept from user
|
|
save.audio_position = 0; // Kept from previous state
|
|
save.vblank_callback = NULL;
|
|
save.user_data = NULL;
|
|
memset(save.keys, 0, sizeof(save.keys)); // Kept from user
|
|
|
|
FILE *f = fopen(path, "w");
|
|
if (!f) {
|
|
return errno;
|
|
}
|
|
|
|
if (fwrite(&save, 1, offsetof(GB_gameboy_t, first_unsaved_data), f) != offsetof(GB_gameboy_t, first_unsaved_data)) {
|
|
fclose(f);
|
|
return EIO;
|
|
}
|
|
|
|
if (fwrite(gb->mbc_ram, 1, gb->mbc_ram_size, f) != gb->mbc_ram_size) {
|
|
fclose(f);
|
|
return EIO;
|
|
}
|
|
|
|
if (fwrite(gb->ram, 1, gb->ram_size, f) != gb->ram_size) {
|
|
fclose(f);
|
|
return EIO;
|
|
}
|
|
|
|
if (fwrite(gb->vram, 1, gb->vram_size, f) != gb->vram_size) {
|
|
fclose(f);
|
|
return EIO;
|
|
}
|
|
|
|
errno = 0;
|
|
fclose(f);
|
|
return errno;
|
|
}
|
|
|
|
int gb_load_state(GB_gameboy_t *gb, const char *path)
|
|
{
|
|
GB_gameboy_t save;
|
|
|
|
FILE *f = fopen(path, "r");
|
|
if (!f) {
|
|
return errno;
|
|
}
|
|
|
|
if (fread(&save, 1, offsetof(GB_gameboy_t, first_unsaved_data), f) != offsetof(GB_gameboy_t, first_unsaved_data)) {
|
|
fclose(f);
|
|
return EIO;
|
|
}
|
|
|
|
save.cartridge_type = gb->cartridge_type;
|
|
save.rom = gb->rom;
|
|
save.rom_size = gb->rom_size;
|
|
save.mbc_ram = gb->mbc_ram;
|
|
save.ram = gb->ram;
|
|
save.vram = gb->vram;
|
|
save.screen = gb->screen;
|
|
save.audio_buffer = gb->audio_buffer;
|
|
save.buffer_size = gb->buffer_size;
|
|
save.sample_rate = gb->sample_rate;
|
|
save.audio_position = gb->audio_position;
|
|
save.vblank_callback = gb->vblank_callback;
|
|
save.user_data = gb->user_data;
|
|
memcpy(save.keys, gb->keys, sizeof(save.keys));
|
|
|
|
if (gb->magic != save.magic) {
|
|
gb_log(gb, "File is not a save state, or is from an incompatible operating system.\n");
|
|
fclose(f);
|
|
return -1;
|
|
}
|
|
|
|
if (gb->version != save.version) {
|
|
gb_log(gb, "Save state is for a different version of SameBoy.\n");
|
|
fclose(f);
|
|
return -1;
|
|
}
|
|
|
|
if (gb->mbc_ram_size != save.mbc_ram_size) {
|
|
gb_log(gb, "Save state has non-matching MBC RAM size.\n");
|
|
fclose(f);
|
|
return -1;
|
|
}
|
|
|
|
if (gb->ram_size != save.ram_size) {
|
|
gb_log(gb, "Save state has non-matching RAM size. Try changing emulated model.\n");
|
|
fclose(f);
|
|
return -1;
|
|
}
|
|
|
|
if (gb->vram_size != save.vram_size) {
|
|
gb_log(gb, "Save state has non-matching VRAM size. Try changing emulated model.\n");
|
|
fclose(f);
|
|
return -1;
|
|
}
|
|
|
|
if (fread(gb->mbc_ram, 1, gb->mbc_ram_size, f) != gb->mbc_ram_size) {
|
|
fclose(f);
|
|
return EIO;
|
|
}
|
|
|
|
if (fread(gb->ram, 1, gb->ram_size, f) != gb->ram_size) {
|
|
fclose(f);
|
|
return EIO;
|
|
}
|
|
|
|
if (fread(gb->vram, 1, gb->vram_size, f) != gb->vram_size) {
|
|
fclose(f);
|
|
return EIO;
|
|
}
|
|
|
|
memcpy(gb, &save, offsetof(GB_gameboy_t, first_unsaved_data));
|
|
errno = 0;
|
|
fclose(f);
|
|
return errno;
|
|
}
|
|
|
|
int gb_save_battery(GB_gameboy_t *gb, const char *path)
|
|
{
|
|
if (!gb->cartridge_type->has_battery) return 0; // Nothing to save.
|
|
FILE *f = fopen(path, "w");
|
|
if (!f) {
|
|
return errno;
|
|
}
|
|
|
|
if (fwrite(gb->mbc_ram, 1, gb->mbc_ram_size, f) != gb->mbc_ram_size) {
|
|
fclose(f);
|
|
return EIO;
|
|
}
|
|
if (gb->cartridge_type->has_rtc) {
|
|
if (fwrite(gb->rtc_data, 1, sizeof(gb->rtc_data), f) != sizeof(gb->rtc_data)) {
|
|
fclose(f);
|
|
return EIO;
|
|
}
|
|
|
|
if (fwrite(&gb->last_rtc_second, 1, sizeof(gb->last_rtc_second), f) != sizeof(gb->last_rtc_second)) {
|
|
fclose(f);
|
|
return EIO;
|
|
}
|
|
}
|
|
|
|
errno = 0;
|
|
fclose(f);
|
|
return errno;
|
|
}
|
|
|
|
/* Loading will silently stop if the format is incomplete */
|
|
void gb_load_battery(GB_gameboy_t *gb, const char *path)
|
|
{
|
|
FILE *f = fopen(path, "r");
|
|
if (!f) {
|
|
return;
|
|
}
|
|
|
|
if (fread(gb->mbc_ram, 1, gb->mbc_ram_size, f) != gb->mbc_ram_size) {
|
|
goto reset_rtc;
|
|
}
|
|
|
|
if (fread(gb->rtc_data, 1, sizeof(gb->rtc_data), f) != sizeof(gb->rtc_data)) {
|
|
goto reset_rtc;
|
|
}
|
|
|
|
if (fread(&gb->last_rtc_second, 1, sizeof(gb->last_rtc_second), f) != sizeof(gb->last_rtc_second)) {
|
|
goto reset_rtc;
|
|
}
|
|
|
|
if (gb->last_rtc_second > time(NULL)) {
|
|
/* We must reset RTC here, or it will not advance. */
|
|
goto reset_rtc;
|
|
}
|
|
|
|
if (gb->last_rtc_second < 852076800) { /* 1/1/97. There weren't any RTC games that time,
|
|
so if the value we read is lower it means it wasn't
|
|
really RTC data. */
|
|
goto reset_rtc;
|
|
}
|
|
goto exit;
|
|
reset_rtc:
|
|
gb->last_rtc_second = time(NULL);
|
|
gb->rtc_high |= 0x80; /* This gives the game a hint that the clock should be reset. */
|
|
exit:
|
|
fclose(f);
|
|
return;
|
|
}
|
|
|
|
void gb_run(GB_gameboy_t *gb)
|
|
{
|
|
update_joyp(gb);
|
|
debugger_run(gb);
|
|
cpu_run(gb);
|
|
}
|
|
|
|
void gb_set_pixels_output(GB_gameboy_t *gb, uint32_t *output)
|
|
{
|
|
gb->screen = output;
|
|
}
|
|
|
|
void gb_set_vblank_callback(GB_gameboy_t *gb, GB_vblank_callback_t callback)
|
|
{
|
|
gb->vblank_callback = callback;
|
|
}
|
|
|
|
void gb_set_log_callback(GB_gameboy_t *gb, GB_log_callback_t callback)
|
|
{
|
|
gb->log_callback = callback;
|
|
}
|
|
|
|
void gb_set_input_callback(GB_gameboy_t *gb, GB_input_callback_t callback)
|
|
{
|
|
gb->input_callback = callback;
|
|
}
|
|
|
|
void gb_set_rgb_encode_callback(GB_gameboy_t *gb, GB_rgb_encode_callback_t callback)
|
|
{
|
|
gb->rgb_encode_callback = callback;
|
|
}
|
|
|
|
void gb_set_sample_rate(GB_gameboy_t *gb, unsigned int sample_rate)
|
|
{
|
|
if (gb->audio_buffer) {
|
|
free(gb->audio_buffer);
|
|
}
|
|
gb->buffer_size = sample_rate / 25; // 40ms delay
|
|
gb->audio_buffer = malloc(gb->buffer_size * 2);
|
|
gb->sample_rate = sample_rate;
|
|
gb->audio_position = 0;
|
|
}
|