/*************************************************************************************** * Genesis Plus * Savestate support * * Copyright (C) 2007, 2008, 2009 Eke-Eke (GCN/Wii port) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * ****************************************************************************************/ #include "shared.h" static unsigned char state[STATE_SIZE]; #define load_param(param, size) \ memcpy(param, &state[bufferptr], size); \ bufferptr+= size; #define save_param(param, size) \ memcpy(&state[bufferptr], param, size); \ bufferptr+= size; void state_load(unsigned char *buffer) { /* buffer size */ int bufferptr = 0; /* uncompress savestate */ unsigned long inbytes, outbytes; memcpy(&inbytes, buffer, 4); outbytes = STATE_SIZE; uncompress ((Bytef *)state, &outbytes, (Bytef *)(buffer + 4), inbytes); /* reset system */ system_reset(); m68k_memory_map[0].base = default_rom; // GENESIS load_param(work_ram, sizeof(work_ram)); load_param(zram, sizeof(zram)); load_param(&zbusreq, sizeof(zbusreq)); load_param(&zreset, sizeof(zreset)); load_param(&zbank, sizeof(zbank)); zbusack = 1 ^(zbusreq & zreset); // IO load_param(io_reg, sizeof(io_reg)); // VDP uint8 temp_reg[0x20]; load_param(sat, sizeof(sat)); load_param(vram, sizeof(vram)); load_param(cram, sizeof(cram)); load_param(vsram, sizeof(vsram)); load_param(temp_reg, sizeof(temp_reg)); load_param(&addr, sizeof(addr)); load_param(&addr_latch, sizeof(addr_latch)); load_param(&code, sizeof(code)); load_param(&pending, sizeof(pending)); load_param(&status, sizeof(status)); load_param(&dmafill, sizeof(dmafill)); load_param(&hint_pending, sizeof(hint_pending)); load_param(&vint_pending, sizeof(vint_pending)); load_param(&irq_status, sizeof(irq_status)); vdp_restore(temp_reg); // FM YM2612Restore(&state[bufferptr]); bufferptr+= YM2612GetContextSize(); // PSG load_param(SN76489_GetContextPtr (0),SN76489_GetContextSize ()); // 68000 uint16 tmp16; uint32 tmp32; load_param(&tmp32, 4); m68k_set_reg(M68K_REG_D0, tmp32); load_param(&tmp32, 4); m68k_set_reg(M68K_REG_D1, tmp32); load_param(&tmp32, 4); m68k_set_reg(M68K_REG_D2, tmp32); load_param(&tmp32, 4); m68k_set_reg(M68K_REG_D3, tmp32); load_param(&tmp32, 4); m68k_set_reg(M68K_REG_D4, tmp32); load_param(&tmp32, 4); m68k_set_reg(M68K_REG_D5, tmp32); load_param(&tmp32, 4); m68k_set_reg(M68K_REG_D6, tmp32); load_param(&tmp32, 4); m68k_set_reg(M68K_REG_D7, tmp32); load_param(&tmp32, 4); m68k_set_reg(M68K_REG_A0, tmp32); load_param(&tmp32, 4); m68k_set_reg(M68K_REG_A1, tmp32); load_param(&tmp32, 4); m68k_set_reg(M68K_REG_A2, tmp32); load_param(&tmp32, 4); m68k_set_reg(M68K_REG_A3, tmp32); load_param(&tmp32, 4); m68k_set_reg(M68K_REG_A4, tmp32); load_param(&tmp32, 4); m68k_set_reg(M68K_REG_A5, tmp32); load_param(&tmp32, 4); m68k_set_reg(M68K_REG_A6, tmp32); load_param(&tmp32, 4); m68k_set_reg(M68K_REG_A7, tmp32); load_param(&tmp32, 4); m68k_set_reg(M68K_REG_PC, tmp32); load_param(&tmp16, 2); m68k_set_reg(M68K_REG_SR, tmp16); load_param(&tmp32, 4); m68k_set_reg(M68K_REG_USP,tmp32); // Z80 load_param(&Z80, sizeof(Z80_Regs)); } int state_save(unsigned char *buffer) { /* buffer size */ int bufferptr = 0; // GENESIS save_param(work_ram, sizeof(work_ram)); save_param(zram, sizeof(zram)); save_param(&zbusreq, sizeof(zbusreq)); save_param(&zreset, sizeof(zreset)); save_param(&zbank, sizeof(zbank)); // IO save_param(io_reg, sizeof(io_reg)); // VDP save_param(sat, sizeof(sat)); save_param(vram, sizeof(vram)); save_param(cram, sizeof(cram)); save_param(vsram, sizeof(vsram)); save_param(reg, sizeof(reg)); save_param(&addr, sizeof(addr)); save_param(&addr_latch, sizeof(addr_latch)); save_param(&code, sizeof(code)); save_param(&pending, sizeof(pending)); save_param(&status, sizeof(status)); save_param(&dmafill, sizeof(dmafill)); save_param(&hint_pending, sizeof(hint_pending)); save_param(&vint_pending, sizeof(vint_pending)); save_param(&irq_status, sizeof(irq_status)); // FM save_param(YM2612GetContextPtr(),YM2612GetContextSize()); // PSG save_param(SN76489_GetContextPtr (0),SN76489_GetContextSize ()); // 68000 uint16 tmp16; uint32 tmp32; tmp32 = m68k_get_reg(NULL, M68K_REG_D0); save_param(&tmp32, 4); tmp32 = m68k_get_reg(NULL, M68K_REG_D1); save_param(&tmp32, 4); tmp32 = m68k_get_reg(NULL, M68K_REG_D2); save_param(&tmp32, 4); tmp32 = m68k_get_reg(NULL, M68K_REG_D3); save_param(&tmp32, 4); tmp32 = m68k_get_reg(NULL, M68K_REG_D4); save_param(&tmp32, 4); tmp32 = m68k_get_reg(NULL, M68K_REG_D5); save_param(&tmp32, 4); tmp32 = m68k_get_reg(NULL, M68K_REG_D6); save_param(&tmp32, 4); tmp32 = m68k_get_reg(NULL, M68K_REG_D7); save_param(&tmp32, 4); tmp32 = m68k_get_reg(NULL, M68K_REG_A0); save_param(&tmp32, 4); tmp32 = m68k_get_reg(NULL, M68K_REG_A1); save_param(&tmp32, 4); tmp32 = m68k_get_reg(NULL, M68K_REG_A2); save_param(&tmp32, 4); tmp32 = m68k_get_reg(NULL, M68K_REG_A3); save_param(&tmp32, 4); tmp32 = m68k_get_reg(NULL, M68K_REG_A4); save_param(&tmp32, 4); tmp32 = m68k_get_reg(NULL, M68K_REG_A5); save_param(&tmp32, 4); tmp32 = m68k_get_reg(NULL, M68K_REG_A6); save_param(&tmp32, 4); tmp32 = m68k_get_reg(NULL, M68K_REG_A7); save_param(&tmp32, 4); tmp32 = m68k_get_reg(NULL, M68K_REG_PC); save_param(&tmp32, 4); tmp16 = m68k_get_reg(NULL, M68K_REG_SR); save_param(&tmp16, 2); tmp32 = m68k_get_reg(NULL, M68K_REG_USP); save_param(&tmp32, 4); // Z80 save_param(&Z80, sizeof(Z80_Regs)); /* compress state file */ unsigned long inbytes = bufferptr; unsigned long outbytes = STATE_SIZE; compress2 ((Bytef *)(buffer + 4), &outbytes, (Bytef *)state, inbytes, 9); memcpy(buffer, &outbytes, 4); /* return total size */ return (outbytes + 4); }