Mercurial > spc_convert
view snes_spc/SNES_SPC_state.cpp @ 2:c3248c71ae74
begin convert program
author | Robert McIntyre <rlm@mit.edu> |
---|---|
date | Fri, 21 Oct 2011 06:21:33 -0700 |
parents | e38dacceb958 |
children |
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1 // SPC emulation state save/load: copy_state(), save_spc()2 // Separate file to avoid linking in unless needed4 // snes_spc 0.9.0. http://www.slack.net/~ant/6 #include "SNES_SPC.h"8 #if !SPC_NO_COPY_STATE_FUNCS10 #include <string.h>12 /* Copyright (C) 2004-2007 Shay Green. This module is free software; you13 can redistribute it and/or modify it under the terms of the GNU Lesser14 General Public License as published by the Free Software Foundation; either15 version 2.1 of the License, or (at your option) any later version. This16 module is distributed in the hope that it will be useful, but WITHOUT ANY17 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS18 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more19 details. You should have received a copy of the GNU Lesser General Public20 License along with this module; if not, write to the Free Software Foundation,21 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */23 #include "blargg_source.h"25 #define RAM (m.ram.ram)26 #define REGS (m.smp_regs [0])27 #define REGS_IN (m.smp_regs [1])29 void SNES_SPC::save_regs( uint8_t out [reg_count] )30 {31 // Use current timer counter values32 for ( int i = 0; i < timer_count; i++ )33 out [r_t0out + i] = m.timers [i].counter;35 // Last written values36 memcpy( out, REGS, r_t0out );37 }39 void SNES_SPC::init_header( void* spc_out )40 {41 spc_file_t* const spc = (spc_file_t*) spc_out;43 spc->has_id666 = 26; // has none44 spc->version = 30;45 memcpy( spc, signature, sizeof spc->signature );46 memset( spc->text, 0, sizeof spc->text );47 }49 void SNES_SPC::save_spc( void* spc_out )50 {51 spc_file_t* const spc = (spc_file_t*) spc_out;53 // CPU54 spc->pcl = (uint8_t) (m.cpu_regs.pc >> 0);55 spc->pch = (uint8_t) (m.cpu_regs.pc >> 8);56 spc->a = m.cpu_regs.a;57 spc->x = m.cpu_regs.x;58 spc->y = m.cpu_regs.y;59 spc->psw = m.cpu_regs.psw;60 spc->sp = m.cpu_regs.sp;62 // RAM, ROM63 memcpy( spc->ram, RAM, sizeof spc->ram );64 if ( m.rom_enabled )65 memcpy( spc->ram + rom_addr, m.hi_ram, sizeof m.hi_ram );66 memset( spc->unused, 0, sizeof spc->unused );67 memcpy( spc->ipl_rom, m.rom, sizeof spc->ipl_rom );69 // SMP registers70 save_regs( &spc->ram [0xF0] );71 int i;72 for ( i = 0; i < port_count; i++ )73 spc->ram [0xF0 + r_cpuio0 + i] = REGS_IN [r_cpuio0 + i];75 // DSP registers76 for ( i = 0; i < SPC_DSP::register_count; i++ )77 spc->dsp [i] = dsp.read( i );78 }80 void SNES_SPC::copy_state( unsigned char** io, copy_func_t copy )81 {82 SPC_State_Copier copier( io, copy );84 // Make state data more readable by putting 64K RAM, 16 SMP registers,85 // then DSP (with its 128 registers) first87 // RAM88 enable_rom( 0 ); // will get re-enabled if necessary in regs_loaded() below89 copier.copy( RAM, 0x10000 );91 {92 // SMP registers93 uint8_t out_ports [port_count];94 uint8_t regs [reg_count];95 memcpy( out_ports, ®S [r_cpuio0], sizeof out_ports );96 save_regs( regs );97 copier.copy( regs, sizeof regs );98 copier.copy( out_ports, sizeof out_ports );99 load_regs( regs );100 regs_loaded();101 memcpy( ®S [r_cpuio0], out_ports, sizeof out_ports );102 }104 // CPU registers105 SPC_COPY( uint16_t, m.cpu_regs.pc );106 SPC_COPY( uint8_t, m.cpu_regs.a );107 SPC_COPY( uint8_t, m.cpu_regs.x );108 SPC_COPY( uint8_t, m.cpu_regs.y );109 SPC_COPY( uint8_t, m.cpu_regs.psw );110 SPC_COPY( uint8_t, m.cpu_regs.sp );111 copier.extra();113 SPC_COPY( int16_t, m.spc_time );114 SPC_COPY( int16_t, m.dsp_time );116 // DSP117 dsp.copy_state( io, copy );119 // Timers120 for ( int i = 0; i < timer_count; i++ )121 {122 Timer* t = &m.timers [i];123 SPC_COPY( int16_t, t->next_time );124 SPC_COPY( uint8_t, t->divider );125 copier.extra();126 }127 copier.extra();128 }129 #endif