mirror of
https://github.com/libretro/smsplus-gx.git
synced 2024-12-04 23:56:29 +00:00
141 lines
3.9 KiB
C
141 lines
3.9 KiB
C
/******************************************************************************
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* Sega Master System / GameGear Emulator
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* Copyright (C) 1998-2007 Charles MacDonald
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*
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* additionnal code by Eke-Eke (SMS Plus GX)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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******************************************************************************/
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#include "shared.h"
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static uint8_t state[0x10000];
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static uint32_t bufferptr;
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#ifndef MAXIM_PSG
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extern sn76489_t psg_sn;
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#endif
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uint32_t system_save_state(FILE* fd)
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{
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/* Save VDP context */
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fwrite(&vdp, sizeof(vdp_t), sizeof(int8_t), fd);
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/* Save SMS context */
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fwrite(&sms, sizeof(sms_t), sizeof(int8_t), fd);
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fwrite(cart.fcr, 4, sizeof(int8_t), fd);
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fwrite(cart.sram, 0x8000, sizeof(int8_t), fd);
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/* Save Z80 context */
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fwrite(Z80_Context, sizeof(z80_t), sizeof(int8_t), fd);
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/* Save YM2413 context */
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fwrite(FM_GetContextPtr(), FM_GetContextSize(), sizeof(int8_t), fd);
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/* Save SN76489 context */
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#ifdef MAXIM_PSG
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fwrite(SN76489_GetContextPtr(0), SN76489_GetContextSize(), sizeof(int8_t), fd);
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#else
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fwrite(&psg_sn, sizeof(sn76489_t), sizeof(int8_t), fd);
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#endif
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return 0;
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}
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void system_load_state(FILE* fd)
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{
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uint8_t *buf;
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/* Initialize everything */
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system_reset();
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/* Load VDP context */
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fread(&vdp, sizeof(vdp_t), sizeof(int8_t), fd);
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/* Load SMS context */
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fread(&sms, sizeof(sms_t), sizeof(int8_t), fd);
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/** restore video & audio settings (needed if timing changed) ***/
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vdp_init();
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SMSPLUS_sound_init();
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fread(cart.fcr, 4, sizeof(int8_t), fd);
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fread(cart.sram, 0x8000, sizeof(int8_t), fd);
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/* Load Z80 context */
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fread(Z80_Context, sizeof(z80_t), sizeof(int8_t), fd);
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/* Load YM2413 context */
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buf = malloc(FM_GetContextSize());
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fread(buf, FM_GetContextSize(), sizeof(int8_t), fd);
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FM_SetContext(buf);
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free(buf);
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/* Load SN76489 context */
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#ifdef MAXIM_PSG
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buf = malloc(SN76489_GetContextSize());
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fread(buf, SN76489_GetContextSize(), sizeof(int8_t), fd);
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SN76489_SetContext(0, buf);
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free(buf);
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#else
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buf = malloc(sizeof(sn76489_t));
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fread(buf, sizeof(sn76489_t), sizeof(int8_t), fd);
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memcpy(&psg_sn, buf, sizeof(sn76489_t));
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free(buf);
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#endif
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if ((sms.console != CONSOLE_COLECO) && (sms.console != CONSOLE_SG1000))
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{
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/* Cartridge by default */
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slot.rom = cart.rom;
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slot.pages = cart.pages;
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slot.mapper = cart.mapper;
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slot.fcr = &cart.fcr[0];
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/* Restore mapping */
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mapper_reset();
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cpu_readmap[0] = &slot.rom[0];
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if (slot.mapper != MAPPER_KOREA_MSX)
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{
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mapper_16k_w(0,slot.fcr[0]);
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mapper_16k_w(1,slot.fcr[1]);
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mapper_16k_w(2,slot.fcr[2]);
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mapper_16k_w(3,slot.fcr[3]);
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}
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else
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{
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mapper_8k_w(0,slot.fcr[0]);
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mapper_8k_w(1,slot.fcr[1]);
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mapper_8k_w(2,slot.fcr[2]);
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mapper_8k_w(3,slot.fcr[3]);
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}
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}
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/* Force full pattern cache update */
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bg_list_index = 0x200;
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for(uint16_t i = 0; i < 0x200; i++)
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{
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bg_name_list[i] = i;
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bg_name_dirty[i] = 255;
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}
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/* Restore palette */
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for(uint32_t i = 0; i < PALETTE_SIZE; i++)
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palette_sync(i);
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}
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