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Fixed state compatibility. Todo: Option for SRAM, Fix Snapshots.

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This commit is contained in:
n-a-c-h
2005-01-31 01:26:24 +00:00
parent 9e48536463
commit 16d95da3dc
2 changed files with 54 additions and 23 deletions
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69
zsnes/src/cpu/zstate.c
View File

@@ -29,6 +29,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#define DIR_SLASH "\\"
#endif
@@ -47,7 +48,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//static unsigned char save_state_buffer[0x80000]; //Save state should never exceed half a megabyte
extern unsigned int CBackupPos, PBackupPos, cycpbl;
extern unsigned int CBackupPos, PBackupPos, cycpbl, PH65816regsize;
extern unsigned int *wramdata, *vram, PHspcsave, PHdspsave, *C4Ram, *sfxramdata;
extern unsigned int PHnum2writesa1reg, SA1Mode, prevedi, SA1xpc, sa1dmaptr;
extern unsigned int soundcycleft, spc700read, timer2upd, xa, PHnum2writesfxreg;
@@ -58,7 +59,7 @@ extern unsigned int SPCMultA, PHnum2writespc7110reg;
extern unsigned char *StateBackup, sndrot, spcRam[65472];
extern unsigned char DSPMem[256], SA1Status, *SA1RAMArea, DSP1Type, DSP1COp;
extern unsigned char prevoamptr, BRRBuffer[32], *romdata;
extern unsigned char prevoamptr, BRRBuffer[32], *romdata, curcyc;
extern bool C4Enable, SFXEnable, SA1Enable, SPC7110Enable, SETAEnable, spcon;
@@ -67,12 +68,18 @@ extern short Op28X, Op0CA, Op02FX, Op0AVS, Op06X, Op01m, Op0DX, Op03F, Op14Zr;
extern short Op0EH;
extern signed short Op10Coefficient;
void copy_state_data(unsigned char *buffer, void (*copy_func)(unsigned char **, void *, size_t), bool file)
static size_t load_save_size;
static unsigned int zst_version;
//For compatibility with old save states (pre v1.43)
#define loading_old_state (file && read && (zst_version == 60))
void copy_state_data(unsigned char *buffer, void (*copy_func)(unsigned char **, void *, size_t), bool file, bool read)
{
//65816 status, etc.
copy_func(&buffer, &curcyc, PH65816regsize);
//SPC Timers
copy_func(&buffer, &cycpbl, 2*4);
copy_func(&buffer, &cycpbl, 2*4);
//SNES PPU Register status
copy_func(&buffer, &sndrot, 3019);
//WRAM (128k), VRAM (64k)
@@ -101,12 +108,15 @@ void copy_state_data(unsigned char *buffer, void (*copy_func)(unsigned char **,
{
copy_func(&buffer, &SA1Mode, PHnum2writesa1reg);
copy_func(&buffer, SA1RAMArea, 8192*16);
copy_func(&buffer, &SA1Status, 3);
copy_func(&buffer, &SA1xpc, 1*4);
copy_func(&buffer, &sa1dmaptr, 2*4);
if (!loading_old_state)
{
copy_func(&buffer, &SA1Status, 3);
copy_func(&buffer, &SA1xpc, 1*4);
copy_func(&buffer, &sa1dmaptr, 2*4);
}
}
if (DSP1Type)
if (DSP1Type && !loading_old_state)
{
copy_func(&buffer, &DSP1COp, 70+128);
copy_func(&buffer, &C4WFXVal, 7*4+7*8+128);
@@ -141,7 +151,12 @@ void copy_state_data(unsigned char *buffer, void (*copy_func)(unsigned char **,
copy_func(&buffer, romdata+0x510000, 65536);
copy_func(&buffer, &SPCMultA, PHnum2writespc7110reg);
}
if (loading_old_state)
{
return;
}
copy_func(&buffer, &soundcycleft, 33);
copy_func(&buffer, &spc700read, 10*4);
copy_func(&buffer, &timer2upd, 1*4);
@@ -155,7 +170,7 @@ void copy_state_data(unsigned char *buffer, void (*copy_func)(unsigned char **,
copy_func(&buffer, &ReadHead, 1*4);
copy_func(&buffer, sram, ramsize);
if (!file)
{
copy_func(&buffer, &tempesi, 4);
@@ -175,7 +190,7 @@ static void memcpyinc(unsigned char **dest, void *src, size_t len)
void BackupCVFrame()
{
unsigned char *curpos = StateBackup + (CBackupPos << 19) + 1024;
copy_state_data(curpos, memcpyinc, false);
copy_state_data(curpos, memcpyinc, false, false);
}
static void memcpyrinc(unsigned char **src, void *dest, size_t len)
@@ -187,7 +202,7 @@ static void memcpyrinc(unsigned char **src, void *dest, size_t len)
void RestoreCVFrame()
{
unsigned char *curpos = StateBackup + (PBackupPos << 19) + 1024;
copy_state_data(curpos, memcpyrinc, false);
copy_state_data(curpos, memcpyrinc, false, true);
}
extern unsigned int Bank0datr8[256], Bank0datr16[256], Bank0datw8[256];
@@ -491,7 +506,8 @@ static void write_save_state_data(unsigned char **dest, void *data, size_t len)
fwrite(data, 1, len, fhandle);
}
static const char zsmesg[] = "ZSNES Save State File V0.6";
static const char zst_header_old[] = "ZSNES Save State File V0.6\x1a\x3c";
static const char zst_header_cur[] = "ZSNES Save State File V143\x1a\x3c";
void statesaver()
{
@@ -528,7 +544,7 @@ void statesaver()
if ((fhandle = fopen(fnamest+1,"wb")))
{
fwrite(zsmesg, 1, sizeof(zsmesg)-1, fhandle);
fwrite(zst_header_cur, 1, sizeof(zst_header_cur)-1, fhandle); //-1 for null
PrepareSaveState();
@@ -543,7 +559,7 @@ void statesaver()
SaveSA1(); //Convert SA-1 stuff to standard, non displacement format
}
copy_state_data(0, write_save_state_data, true);
copy_state_data(0, write_save_state_data, true, false);
if (SFXEnable)
{
@@ -559,7 +575,7 @@ void statesaver()
if (cbitmode && !NoPictureSave)
{
CapturePicture();
fwrite (PrevPicture, 1, 64*56*2, fhandle);
fwrite(PrevPicture, 1, 64*56*2, fhandle);
}
fclose (fhandle);
@@ -702,7 +718,6 @@ extern unsigned char ioportval, SDD1Enable, nexthdma;
void procexecloop();
size_t load_save_size;
static void read_save_state_data(unsigned char **dest, void *data, size_t len)
{
load_save_size += fread(data, 1, len, fhandle);
@@ -710,7 +725,7 @@ static void read_save_state_data(unsigned char **dest, void *data, size_t len)
void stateloader (unsigned char *statename, unsigned char keycheck, unsigned char xfercheck)
{
char zsmesgcheck[sizeof(zsmesg)-1];
char zst_header_check[sizeof(zst_header_cur)-1];
if (keycheck)
{
@@ -744,13 +759,23 @@ void stateloader (unsigned char *statename, unsigned char keycheck, unsigned cha
//Actual state loading code
if ((fhandle = fopen(statename,"rb")) != NULL)
{
zst_version = 0;
if (xfercheck) { Totalbyteloaded = 0; }
Totalbyteloaded += fread(zsmesgcheck, 1, sizeof(zsmesgcheck), fhandle);
if (!memcmp(zsmesgcheck, zsmesg, sizeof(zsmesgcheck))) //Just drop older states
Totalbyteloaded += fread(zst_header_check, 1, sizeof(zst_header_check), fhandle);
if (!memcmp(zst_header_check, zst_header_cur, sizeof(zst_header_check)))
{
zst_version = 143; //v1.43+
}
if (!memcmp(zst_header_check, zst_header_old, sizeof(zst_header_check)))
{
zst_version = 60; //v0.60 - v1.42
}
if (zst_version) //Pre v0.60 saves are no longer loaded
{
load_save_size = 0;
copy_state_data(0, read_save_state_data, true);
copy_state_data(0, read_save_state_data, true, true);
Totalbyteloaded += load_save_size;
if (SFXEnable)

8
zsnes/src/init.asm
View File

@@ -434,7 +434,8 @@ NEWSYM cycpblt2, db 149 ; percentage of CPU/SPC to run
NEWSYM writeon, db 0 ; Write enable/disable on snes rom memory
NEWSYM totlines, dw 263 ; total # of lines
NEWSYM soundon, db 0 ; Current sound enabled (1=enabled)
NEWSYM versn, db 60 ; version #/100
;This is saved in states
NEWSYM curcyc, db 0 ; cycles left in scanline
NEWSYM curypos, dw 0 ; current y position
NEWSYM cacheud, db 1 ; update cache every ? frames
@@ -462,10 +463,15 @@ NEWSYM xirqb, db 0 ; which bank the irqs start at
NEWSYM debugger, db 0 ; Start with debugger (1=yes,0=no)
NEWSYM Curtableaddr, dd 0 ; Current table address
NEWSYM curnmi, db 0 ; if in NMI(1) or not(0)
; pharos - equ hack *sigh*
n65816regsize equ $-curcyc
ALIGN32
NEWSYM cycpbl, dd 110 ; percentage left of CPU/SPC to run (3.58 = 175)
NEWSYM cycpblt, dd 110 ; percentage of CPU/SPC to run
NEWSYM PH65816regsize, dd n65816regsize
; SNES memory map ROM locations
NEWSYM cpuoverptr, dd 0 ; pointer to cpuover