Initial BESS support, no SGB nor RTC yet
This commit is contained in:
Lior Halphon
parent
925bd863c0
commit
75bc1e9a86
@ -1181,11 +1181,11 @@ static unsigned *multiplication_table_for_frequency(unsigned frequency)
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}];
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if (!success) {
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NSBeep();
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}
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if (error) {
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[GBWarningPopover popoverWithContents:error onWindow:self.mainWindow];
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}
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NSBeep();
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}
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}
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- (IBAction)clearConsole:(id)sender
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@ -1,6 +1,88 @@
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#include "gb.h"
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#include <stdio.h>
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#include <errno.h>
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#include <assert.h>
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#define str(x) #x
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#define xstr(x) str(x)
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#ifdef GB_BIG_ENDIAN
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#define BESS_NAME "SameBoy v" xstr(VERSION) "(Big Endian)"
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#else
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#define BESS_NAME "SameBoy v" xstr(VERSION)
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#endif
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typedef struct __attribute__((packed)) {
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uint32_t magic;
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uint32_t size;
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} BESS_block_t;
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typedef struct __attribute__((packed)) {
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uint32_t size;
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uint32_t offset;
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} BESS_buffer_t;
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typedef struct __attribute__((packed)) {
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uint32_t start_offset;
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uint32_t magic;
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} BESS_footer_t;
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typedef struct __attribute__((packed)) {
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BESS_block_t header;
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uint16_t major;
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uint16_t minor;
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union {
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struct {
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char family;
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char model;
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char revision;
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char padding;
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};
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uint32_t full_model;
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};
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uint16_t pc;
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uint16_t af;
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uint16_t bc;
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uint16_t de;
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uint16_t hl;
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uint16_t sp;
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uint8_t ime;
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uint8_t ie;
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uint8_t execution_mode; // 0 = running; 1 = halted; 2 = stopped
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uint8_t io_registers[0x80];
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uint8_t hram[0x7f];
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BESS_buffer_t ram;
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BESS_buffer_t vram;
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BESS_buffer_t mbc_ram;
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} BESS_CORE_t;
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typedef struct __attribute__((packed)) {
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BESS_block_t header;
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uint8_t oam[256];
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} BESS_OAM_t;
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typedef struct __attribute__((packed)) {
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BESS_block_t header;
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uint8_t background_palettes[0x40];
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uint8_t sprite_palettes[0x40];
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} BESS_PALS_t;
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typedef struct __attribute__((packed)) {
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uint16_t address;
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uint8_t value;
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} BESS_MBC_pair_t;
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#ifdef GB_BIG_ENDIAN
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#define BESS16(x) __builtin_bswap16(x)
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#define BESS32(x) __builtin_bswap32(x)
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#else
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#define BESS16(x) (x)
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#define BESS32(x) (x)
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#endif
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typedef struct virtual_file_s virtual_file_t;
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struct virtual_file_s
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@ -8,6 +90,7 @@ struct virtual_file_s
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size_t (*read)(virtual_file_t *file, void *dest, size_t length);
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size_t (*write)(virtual_file_t *file, const void *dest, size_t length);
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void (*seek)(virtual_file_t *file, ssize_t ammount, int origin);
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size_t (*tell)(virtual_file_t *file);
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union {
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FILE *file;
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struct {
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@ -33,8 +116,16 @@ static size_t file_write(virtual_file_t *file, const void *src, size_t length)
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return fwrite(src, 1, length, file->file);
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}
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static size_t file_tell(virtual_file_t *file)
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{
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return ftell(file->file);
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}
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static size_t buffer_read(virtual_file_t *file, void *dest, size_t length)
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{
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if (length & 0x80000000) {
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return 0;
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}
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errno = 0;
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if (length > file->size - file->position) {
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errno = EIO;
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@ -75,6 +166,31 @@ static size_t buffer_write(virtual_file_t *file, const void *src, size_t size)
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return size;
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}
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static size_t buffer_tell(virtual_file_t *file)
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{
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return file->position;
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}
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static size_t bess_size_for_cartridge(const GB_cartridge_t *cart)
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{
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switch (cart->mbc_type) {
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default:
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case GB_NO_MBC: return 0;
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case GB_MBC1:
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return sizeof(BESS_block_t) + 4 * sizeof(BESS_MBC_pair_t);
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case GB_MBC2:
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return sizeof(BESS_block_t) + 2 * sizeof(BESS_MBC_pair_t);
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case GB_MBC3:
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return sizeof(BESS_block_t) + 4 * sizeof(BESS_MBC_pair_t);
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case GB_MBC5:
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return sizeof(BESS_block_t) + 4 * sizeof(BESS_MBC_pair_t);
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case GB_HUC1:
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return sizeof(BESS_block_t) + 4 * sizeof(BESS_MBC_pair_t);
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case GB_HUC3:
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return sizeof(BESS_block_t) + 3 * sizeof(BESS_MBC_pair_t);
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}
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}
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size_t GB_get_save_state_size(GB_gameboy_t *gb)
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{
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return GB_SECTION_SIZE(header)
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@ -89,11 +205,21 @@ size_t GB_get_save_state_size(GB_gameboy_t *gb)
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+ (GB_is_hle_sgb(gb)? sizeof(*gb->sgb) + sizeof(uint32_t) : 0)
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+ gb->mbc_ram_size
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+ gb->ram_size
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+ gb->vram_size;
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+ gb->vram_size
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// BESS
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+ sizeof(BESS_CORE_t)
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+ sizeof(BESS_block_t) // NAME
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+ sizeof(BESS_NAME) - 1
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+ sizeof(BESS_OAM_t)
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+ (GB_is_cgb(gb)? sizeof(BESS_PALS_t) : 0)
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+ bess_size_for_cartridge(gb->cartridge_type) // MBC block
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+ sizeof(BESS_block_t) // END block
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+ sizeof(BESS_footer_t);
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}
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static bool verify_and_update_state_compatibility(GB_gameboy_t *gb, GB_gameboy_t *save)
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static bool verify_and_update_state_compatibility(GB_gameboy_t *gb, GB_gameboy_t *save, bool *attempt_bess)
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{
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*attempt_bess = false;
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if (save->ram_size == 0 && (&save->ram_size)[-1] == gb->ram_size) {
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/* This is a save state with a bad printer struct from a 32-bit OS */
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memmove(save->extra_oam + 4, save->extra_oam, (uintptr_t)&save->ram_size - (uintptr_t)&save->extra_oam);
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@ -121,6 +247,7 @@ static bool verify_and_update_state_compatibility(GB_gameboy_t *gb, GB_gameboy_t
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if (gb->version != save->version) {
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GB_log(gb, "The save state is for a different version of SameBoy.\n");
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*attempt_bess = true;
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return false;
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}
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@ -190,6 +317,66 @@ static bool dump_section(virtual_file_t *file, const void *src, uint32_t size)
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#define DUMP_SECTION(gb, f, section) dump_section(f, GB_GET_SECTION(gb, section), GB_SECTION_SIZE(section))
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static int save_bess_mbc_block(GB_gameboy_t *gb, virtual_file_t *file)
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{
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BESS_block_t mbc_block = {htonl('MBC '), 0};
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BESS_MBC_pair_t pairs[4];
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switch (gb->cartridge_type->mbc_type) {
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default:
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case GB_NO_MBC: return 0;
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case GB_MBC1:
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pairs[0] = (BESS_MBC_pair_t){BESS16(0x0000), gb->mbc_ram_enable? 0xA : 0x0};
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pairs[1] = (BESS_MBC_pair_t){BESS16(0x2000), gb->mbc1.bank_low};
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pairs[2] = (BESS_MBC_pair_t){BESS16(0x4000), gb->mbc1.bank_high};
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pairs[3] = (BESS_MBC_pair_t){BESS16(0x6000), gb->mbc1.mode};
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mbc_block.size = 4 * sizeof(pairs[0]);
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break;
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case GB_MBC2:
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pairs[0] = (BESS_MBC_pair_t){BESS16(0x0000), gb->mbc_ram_enable? 0xA : 0x0};
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pairs[1] = (BESS_MBC_pair_t){BESS16(0x0100), gb->mbc2.rom_bank};
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mbc_block.size = 2 * sizeof(pairs[0]);
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break;
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case GB_MBC3:
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pairs[0] = (BESS_MBC_pair_t){BESS16(0x0000), gb->mbc_ram_enable? 0xA : 0x0};
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pairs[1] = (BESS_MBC_pair_t){BESS16(0x2000), gb->mbc3.rom_bank};
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pairs[2] = (BESS_MBC_pair_t){BESS16(0x4000), gb->mbc3.ram_bank | (gb->mbc3_rtc_mapped? 8 : 0)};
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pairs[3] = (BESS_MBC_pair_t){BESS16(0x6000), gb->rtc_latch};
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mbc_block.size = 4 * sizeof(pairs[0]);
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break;
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case GB_MBC5:
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pairs[0] = (BESS_MBC_pair_t){BESS16(0x0000), gb->mbc_ram_enable? 0xA : 0x0};
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pairs[1] = (BESS_MBC_pair_t){BESS16(0x2000), gb->mbc5.rom_bank_low};
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pairs[2] = (BESS_MBC_pair_t){BESS16(0x3000), gb->mbc5.rom_bank_high};
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pairs[3] = (BESS_MBC_pair_t){BESS16(0x4000), gb->mbc5.ram_bank};
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mbc_block.size = 4 * sizeof(pairs[0]);
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break;
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case GB_HUC1:
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pairs[0] = (BESS_MBC_pair_t){BESS16(0x0000), gb->huc1.ir_mode? 0xE : 0x0};
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pairs[1] = (BESS_MBC_pair_t){BESS16(0x2000), gb->huc1.bank_low};
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pairs[2] = (BESS_MBC_pair_t){BESS16(0x4000), gb->huc1.bank_high};
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pairs[3] = (BESS_MBC_pair_t){BESS16(0x6000), gb->huc1.mode};
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mbc_block.size = 4 * sizeof(pairs[0]);
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case GB_HUC3:
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pairs[0] = (BESS_MBC_pair_t){BESS16(0x0000), gb->huc3_mode};
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pairs[1] = (BESS_MBC_pair_t){BESS16(0x2000), gb->huc3.rom_bank};
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pairs[2] = (BESS_MBC_pair_t){BESS16(0x4000), gb->huc3.ram_bank};
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mbc_block.size = 3 * sizeof(pairs[0]);
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break;
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}
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if (file->write(file, &mbc_block, sizeof(mbc_block)) != sizeof(mbc_block)) {
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return errno;
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}
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if (file->write(file, &pairs, mbc_block.size) != mbc_block.size) {
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return errno;
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}
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return 0;
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}
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static int save_state_internal(GB_gameboy_t *gb, virtual_file_t *file)
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{
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if (file->write(file, GB_GET_SECTION(gb, header), GB_SECTION_SIZE(header)) != GB_SECTION_SIZE(header)) goto error;
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@ -206,20 +393,139 @@ static int save_state_internal(GB_gameboy_t *gb, virtual_file_t *file)
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if (!dump_section(file, gb->sgb, sizeof(*gb->sgb))) goto error;
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}
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BESS_CORE_t bess_core;
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bess_core.mbc_ram.offset = file->tell(file);
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bess_core.mbc_ram.size = gb->mbc_ram_size;
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if (file->write(file, gb->mbc_ram, gb->mbc_ram_size) != gb->mbc_ram_size) {
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goto error;
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}
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bess_core.ram.offset = file->tell(file);
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bess_core.ram.size = gb->ram_size;
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if (file->write(file, gb->ram, gb->ram_size) != gb->ram_size) {
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goto error;
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}
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bess_core.vram.offset = file->tell(file);
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bess_core.vram.size = gb->vram_size;
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if (file->write(file, gb->vram, gb->vram_size) != gb->vram_size) {
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goto error;
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}
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errno = 0;
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BESS_footer_t bess_footer = {
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.start_offset = file->tell(file),
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.magic = htonl('BESS'),
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};
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/* BESS CORE */
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bess_core.header = (BESS_block_t){htonl('CORE'), BESS32(sizeof(bess_core) - sizeof(bess_core.header))};
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bess_core.major = BESS16(1);
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bess_core.minor = BESS16(1);
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switch (gb->model) {
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case GB_MODEL_DMG_B: bess_core.full_model = htonl('GDB '); break;
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case GB_MODEL_SGB_NTSC:
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case GB_MODEL_SGB_NTSC_NO_SFC:
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bess_core.full_model = htonl('SN '); break;
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case GB_MODEL_SGB_PAL_NO_SFC:
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case GB_MODEL_SGB_PAL:
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bess_core.full_model = htonl('SP '); break;
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case GB_MODEL_SGB2_NO_SFC:
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case GB_MODEL_SGB2:
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bess_core.full_model = htonl('S2 '); break;
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case GB_MODEL_CGB_C: bess_core.full_model = htonl('CCC '); break;
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case GB_MODEL_CGB_E: bess_core.full_model = htonl('CCE '); break;
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case GB_MODEL_AGB: bess_core.full_model = htonl('CA '); break; // SameBoy doesn't emulate a specific AGB revision yet
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}
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bess_core.pc = BESS16(gb->pc);
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bess_core.af = BESS16(gb->af);
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bess_core.bc = BESS16(gb->bc);
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bess_core.de = BESS16(gb->de);
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bess_core.hl = BESS16(gb->hl);
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bess_core.sp = BESS16(gb->sp);
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bess_core.ime = gb->ime;
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bess_core.ie = gb->interrupt_enable;
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bess_core.execution_mode = 0;
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if (gb->halted) {
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bess_core.execution_mode = 1;
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}
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else if (gb->stopped) {
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bess_core.execution_mode = 2;
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}
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memcpy(bess_core.io_registers, gb->io_registers, sizeof(gb->io_registers));
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bess_core.io_registers[GB_IO_DIV] = gb->div_counter >> 8;
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bess_core.io_registers[GB_IO_BANK] = gb->boot_rom_finished;
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bess_core.io_registers[GB_IO_KEY1] |= gb->cgb_double_speed? 0x80 : 0;
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memcpy(bess_core.hram, gb->hram, sizeof(gb->hram));
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if (file->write(file, &bess_core, sizeof(bess_core)) != sizeof(bess_core)) {
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goto error;
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}
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/* BESS NAME */
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static const BESS_block_t bess_name = {htonl('NAME'), BESS32(sizeof(BESS_NAME) - 1)};
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if (file->write(file, &bess_name, sizeof(bess_name)) != sizeof(bess_name)) {
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goto error;
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}
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if (file->write(file, BESS_NAME, sizeof(BESS_NAME) - 1) != sizeof(BESS_NAME) - 1) {
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goto error;
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}
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/* BESS OAM */
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BESS_OAM_t bess_oam;
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bess_oam.header = (BESS_block_t){htonl('OAM '), BESS32(sizeof(bess_oam) - sizeof(bess_oam.header))};
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memcpy(bess_oam.oam, gb->oam, sizeof(gb->oam));
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memcpy(bess_oam.oam + sizeof(gb->oam), gb->extra_oam, sizeof(gb->extra_oam));
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if (file->write(file, &bess_oam, sizeof(bess_oam)) != sizeof(bess_oam)) {
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goto error;
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}
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save_bess_mbc_block(gb, file);
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if (GB_is_cgb(gb)) {
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/* BESS PALS */
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BESS_PALS_t bess_pals;
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bess_pals.header = (BESS_block_t){htonl('PALS'), BESS32(sizeof(bess_pals) - sizeof(bess_oam.header))};
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memcpy(bess_pals.background_palettes, gb->background_palettes_data, sizeof(bess_pals.background_palettes));
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memcpy(bess_pals.sprite_palettes, gb->sprite_palettes_data, sizeof(bess_pals.sprite_palettes));
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if (file->write(file, &bess_pals, sizeof(bess_pals)) != sizeof(bess_pals)) {
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goto error;
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}
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}
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/* BESS END */
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static const BESS_block_t bess_end = {htonl('END '), 0};
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if (file->write(file, &bess_end, sizeof(bess_end)) != sizeof(bess_end)) {
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goto error;
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}
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/* BESS Footer */
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if (file->write(file, &bess_footer, sizeof(bess_footer)) != sizeof(bess_footer)) {
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goto error;
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}
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errno = 0;
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error:
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return errno;
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}
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@ -234,6 +540,7 @@ int GB_save_state(GB_gameboy_t *gb, const char *path)
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virtual_file_t file = {
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.write = file_write,
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.seek = file_seek,
|
||||
.tell = file_tell,
|
||||
.file = f,
|
||||
};
|
||||
int ret = save_state_internal(gb, &file);
|
||||
@ -246,11 +553,13 @@ void GB_save_state_to_buffer(GB_gameboy_t *gb, uint8_t *buffer)
|
||||
virtual_file_t file = {
|
||||
.write = buffer_write,
|
||||
.seek = buffer_seek,
|
||||
.tell = buffer_tell,
|
||||
.buffer = (uint8_t *)buffer,
|
||||
.position = 0,
|
||||
};
|
||||
|
||||
save_state_internal(gb, &file);
|
||||
assert(file.position == GB_get_save_state_size(gb));
|
||||
}
|
||||
|
||||
|
||||
@ -284,6 +593,229 @@ static bool read_section(virtual_file_t *file, void *dest, uint32_t size, bool f
|
||||
return true;
|
||||
}
|
||||
|
||||
static void read_bess_buffer(const BESS_buffer_t *buffer, virtual_file_t *file, uint8_t *dest, size_t max_size)
|
||||
{
|
||||
size_t pos = file->tell(file);
|
||||
file->seek(file, BESS32(buffer->offset), SEEK_SET);
|
||||
file->read(file, dest, MIN(BESS32(buffer->size), max_size));
|
||||
file->seek(file, pos, SEEK_SET);
|
||||
}
|
||||
|
||||
static int load_bess_save(GB_gameboy_t *gb, virtual_file_t *file, bool is_sameboy)
|
||||
{
|
||||
char emulator_name[65] = {0,};
|
||||
file->seek(file, -sizeof(BESS_footer_t), SEEK_END);
|
||||
BESS_footer_t footer = {0, };
|
||||
file->read(file, &footer, sizeof(footer));
|
||||
if (footer.magic != htonl('BESS')) {
|
||||
// Not a BESS file
|
||||
if (!is_sameboy) {
|
||||
GB_log(gb, "The file is not a save state, or is from an incompatible operating system.\n");
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
GB_gameboy_t save;
|
||||
GB_init(&save, gb->model);
|
||||
save.cartridge_type = gb->cartridge_type;
|
||||
|
||||
file->seek(file, BESS32(footer.start_offset), SEEK_SET);
|
||||
bool found_core = false;
|
||||
BESS_CORE_t core;
|
||||
while (true) {
|
||||
BESS_block_t block;
|
||||
if (file->read(file, &block, sizeof(block)) != sizeof(block)) goto error;
|
||||
switch (block.magic) {
|
||||
case htonl('CORE'):
|
||||
if (found_core) goto parse_error;
|
||||
found_core = true;
|
||||
if (BESS32(block.size) > sizeof(core) - sizeof(block)) {
|
||||
if (file->read(file, &core.header + 1, sizeof(core) - sizeof(block)) != sizeof(core) - sizeof(block)) goto error;
|
||||
file->seek(file, BESS32(block.size) - (sizeof(core) - sizeof(block)), SEEK_CUR);
|
||||
}
|
||||
else {
|
||||
if (file->read(file, &core.header + 1, BESS32(block.size)) != BESS32(block.size)) goto error;
|
||||
}
|
||||
|
||||
if (core.major != BESS16(1)) {
|
||||
GB_log(gb, "This save state uses an incompatible version of the BESS specification");
|
||||
GB_free(&save);
|
||||
return -1;
|
||||
}
|
||||
|
||||
switch (core.family) {
|
||||
case 'C':
|
||||
if (!GB_is_cgb(&save)) goto wrong_model;
|
||||
break;
|
||||
case 'S':
|
||||
if (!GB_is_sgb(&save)) goto wrong_model;
|
||||
break;
|
||||
case 'G':
|
||||
if (GB_is_cgb(&save) || GB_is_sgb(&save)) goto wrong_model;
|
||||
break;
|
||||
default:
|
||||
wrong_model:
|
||||
GB_log(gb, "The save state is for a different model. Try changing the emulated model.\n");
|
||||
GB_free(&save);
|
||||
return -1;
|
||||
}
|
||||
|
||||
|
||||
save.pc = BESS16(core.pc);
|
||||
save.af = BESS16(core.af);
|
||||
save.bc = BESS16(core.bc);
|
||||
save.de = BESS16(core.de);
|
||||
save.hl = BESS16(core.hl);
|
||||
save.sp = BESS16(core.sp);
|
||||
|
||||
save.ime = core.ime;
|
||||
save.interrupt_enable = core.ie;
|
||||
|
||||
save.halted = core.execution_mode == 1;
|
||||
save.stopped = core.execution_mode == 2;
|
||||
|
||||
memcpy(save.hram, core.hram, sizeof(save.hram));
|
||||
|
||||
// CPU related
|
||||
|
||||
// Determines DMG mode
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_KEY0, core.io_registers[GB_IO_KEY0]);
|
||||
save.boot_rom_finished = core.io_registers[GB_IO_BANK];
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_KEY1, core.io_registers[GB_IO_KEY1]);
|
||||
if (save.cgb_mode) {
|
||||
save.cgb_double_speed = core.io_registers[GB_IO_KEY1] & 0x80;
|
||||
save.object_priority = GB_OBJECT_PRIORITY_INDEX;
|
||||
}
|
||||
else {
|
||||
save.object_priority = GB_OBJECT_PRIORITY_X;
|
||||
}
|
||||
|
||||
// Timers, Joypad and Serial
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_JOYP, core.io_registers[GB_IO_JOYP]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_SB, core.io_registers[GB_IO_SB]);
|
||||
save.io_registers[GB_IO_SC] = core.io_registers[GB_IO_SC];
|
||||
save.div_counter = core.io_registers[GB_IO_DIV] << 8;
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_TIMA, core.io_registers[GB_IO_TIMA]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_TMA, core.io_registers[GB_IO_TMA]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_TAC, core.io_registers[GB_IO_TAC]);
|
||||
|
||||
// APU
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_NR52, core.io_registers[GB_IO_NR52]);
|
||||
for (unsigned i = GB_IO_NR10; i < GB_IO_NR52; i++) {
|
||||
uint8_t value = core.io_registers[i];
|
||||
if (i == GB_IO_NR14 || i == GB_IO_NR24 || i == GB_IO_NR34 || i == GB_IO_NR44) {
|
||||
value &= ~0x80;
|
||||
}
|
||||
GB_write_memory(&save, 0xFF00 + i, value);
|
||||
}
|
||||
|
||||
for (unsigned i = GB_IO_WAV_START; i <= GB_IO_WAV_END; i++) {
|
||||
GB_write_memory(&save, 0xFF00 + i, core.io_registers[i]);
|
||||
}
|
||||
|
||||
// PPU
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_LCDC, core.io_registers[GB_IO_LCDC]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_STAT, core.io_registers[GB_IO_STAT]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_SCY, core.io_registers[GB_IO_SCY]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_SCX, core.io_registers[GB_IO_SCX]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_LYC, core.io_registers[GB_IO_LYC]);
|
||||
save.io_registers[GB_IO_DMA] = core.io_registers[GB_IO_DMA];
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_BGP, core.io_registers[GB_IO_BGP]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_OBP0, core.io_registers[GB_IO_OBP0]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_OBP1, core.io_registers[GB_IO_OBP1]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_WX, core.io_registers[GB_IO_WX]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_WY, core.io_registers[GB_IO_WY]);
|
||||
|
||||
// Other registers
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_VBK, core.io_registers[GB_IO_VBK]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_HDMA1, core.io_registers[GB_IO_HDMA1]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_HDMA2, core.io_registers[GB_IO_HDMA2]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_HDMA3, core.io_registers[GB_IO_HDMA3]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_HDMA4, core.io_registers[GB_IO_HDMA4]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_RP, core.io_registers[GB_IO_RP]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_BGPI, core.io_registers[GB_IO_BGPI]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_OBPI, core.io_registers[GB_IO_OBPI]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_OPRI, core.io_registers[GB_IO_OPRI]);
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_SVBK, core.io_registers[GB_IO_SVBK]);
|
||||
|
||||
// Interrupts
|
||||
GB_write_memory(&save, 0xFF00 + GB_IO_IF, core.io_registers[GB_IO_IF]);
|
||||
|
||||
break;
|
||||
case htonl('NAME'):
|
||||
if (!found_core) goto parse_error;
|
||||
if (BESS32(block.size) > sizeof(emulator_name) - 1) {
|
||||
file->seek(file, BESS32(block.size), SEEK_CUR);
|
||||
}
|
||||
else {
|
||||
file->read(file, emulator_name, BESS32(block.size));
|
||||
}
|
||||
break;
|
||||
case htonl('OAM '):
|
||||
if (!found_core) goto parse_error;
|
||||
if (BESS32(block.size) != 256 && BESS32(block.size) != 160) goto parse_error;
|
||||
file->read(file, save.oam, sizeof(save.oam));
|
||||
if (BESS32(block.size) == 256) {
|
||||
file->read(file, save.extra_oam, sizeof(save.extra_oam));
|
||||
}
|
||||
break;
|
||||
case htonl('PALS'):
|
||||
if (!found_core) goto parse_error;
|
||||
if (BESS32(block.size) != sizeof(BESS_PALS_t) - sizeof(block)) goto parse_error;
|
||||
file->read(file, save.background_palettes_data, sizeof(save.background_palettes_data));
|
||||
file->read(file, save.sprite_palettes_data, sizeof(save.sprite_palettes_data));
|
||||
break;
|
||||
case htonl('MBC '):
|
||||
if (!found_core) goto parse_error;
|
||||
if (BESS32(block.size) % 3 != 0) goto parse_error;
|
||||
for (unsigned i = BESS32(block.size); i > 0; i -= 3) {
|
||||
BESS_MBC_pair_t pair;
|
||||
file->read(file, &pair, sizeof(pair));
|
||||
if (BESS16(pair.address) >= 0x8000) goto parse_error;
|
||||
GB_write_memory(&save, BESS16(pair.address), pair.value);
|
||||
}
|
||||
break;
|
||||
case htonl('END '):
|
||||
if (!found_core) goto parse_error;
|
||||
if (BESS32(block.size) != 0) goto parse_error;
|
||||
goto done;
|
||||
default:
|
||||
file->seek(file, BESS32(block.size), SEEK_CUR);
|
||||
break;
|
||||
}
|
||||
}
|
||||
done:
|
||||
save.mbc_ram_size = gb->mbc_ram_size;
|
||||
memcpy(gb, &save, GB_SECTION_OFFSET(unsaved));
|
||||
assert(GB_get_save_state_size(gb) == GB_get_save_state_size(&save));
|
||||
GB_free(&save);
|
||||
read_bess_buffer(&core.ram, file, gb->ram, gb->ram_size);
|
||||
read_bess_buffer(&core.vram, file, gb->vram, gb->vram_size);
|
||||
read_bess_buffer(&core.mbc_ram, file, gb->mbc_ram, gb->mbc_ram_size);
|
||||
if (emulator_name[0]) {
|
||||
GB_log(gb, "Save state imported from %s.\n", emulator_name);
|
||||
}
|
||||
else {
|
||||
GB_log(gb, "Save state imported from another emulator.\n"); // SameBoy always contains a NAME block
|
||||
}
|
||||
for (unsigned i = 0; i < 32; i++) {
|
||||
GB_palette_changed(gb, false, i * 2);
|
||||
GB_palette_changed(gb, true, i * 2);
|
||||
}
|
||||
return 0;
|
||||
parse_error:
|
||||
errno = -1;
|
||||
error:
|
||||
if (emulator_name[0]) {
|
||||
GB_log(gb, "Attempted to import a save state from %s, but the save state is invalid.\n", emulator_name);
|
||||
}
|
||||
else {
|
||||
GB_log(gb, "Attempted to import a save state from a different emulator or incompatible version, but the save state is invalid.\n");
|
||||
}
|
||||
GB_free(&save);
|
||||
return errno;
|
||||
}
|
||||
|
||||
static int load_state_internal(GB_gameboy_t *gb, virtual_file_t *file)
|
||||
{
|
||||
GB_gameboy_t save;
|
||||
@ -304,8 +836,7 @@ static int load_state_internal(GB_gameboy_t *gb, virtual_file_t *file)
|
||||
fix_broken_windows_saves = true;
|
||||
}
|
||||
if (gb->magic != save.magic) {
|
||||
GB_log(gb, "The file is not a save state, or is from an incompatible operating system.\n");
|
||||
return false;
|
||||
return load_bess_save(gb, file, false);
|
||||
}
|
||||
#define READ_SECTION(gb, file, section) read_section(file, GB_GET_SECTION(gb, section), GB_SECTION_SIZE(section), fix_broken_windows_saves)
|
||||
if (!READ_SECTION(&save, file, core_state)) return errno ?: EIO;
|
||||
@ -319,7 +850,11 @@ static int load_state_internal(GB_gameboy_t *gb, virtual_file_t *file)
|
||||
#undef READ_SECTION
|
||||
|
||||
|
||||
if (!verify_and_update_state_compatibility(gb, &save)) {
|
||||
bool attempt_bess = false;
|
||||
if (!verify_and_update_state_compatibility(gb, &save, &attempt_bess)) {
|
||||
if (attempt_bess) {
|
||||
return load_bess_save(gb, file, true);
|
||||
}
|
||||
return errno;
|
||||
}
|
||||
|
||||
@ -362,6 +897,7 @@ int GB_load_state(GB_gameboy_t *gb, const char *path)
|
||||
virtual_file_t file = {
|
||||
.read = file_read,
|
||||
.seek = file_seek,
|
||||
.tell = file_tell,
|
||||
.file = f,
|
||||
};
|
||||
int ret = load_state_internal(gb, &file);
|
||||
@ -374,6 +910,7 @@ int GB_load_state_from_buffer(GB_gameboy_t *gb, const uint8_t *buffer, size_t le
|
||||
virtual_file_t file = {
|
||||
.read = buffer_read,
|
||||
.seek = buffer_seek,
|
||||
.tell = buffer_tell,
|
||||
.buffer = (uint8_t *)buffer,
|
||||
.position = 0,
|
||||
.size = length,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user