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https://github.com/dborth/snes9xgx.git
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rewrite SRAM code
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dborth
parent
a5a8dba908
commit
8ff4c5a69d
@ -32,83 +32,43 @@ extern unsigned short gcpadmap[];
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char sramcomment[2][32];
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/****************************************************************************
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* Prepare Memory Card SRAM Save Data
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*
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* This sets up the save buffer for saving to a memory card.
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****************************************************************************/
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int
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prepareMCsavedata ()
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{
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int offset = sizeof (saveicon);
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int size;
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ClearSaveBuffer ();
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/*** Copy in save icon ***/
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memcpy (savebuffer, saveicon, offset);
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/*** And the sramcomments ***/
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sprintf (sramcomment[0], "%s SRAM", VERSIONSTR);
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sprintf (sramcomment[1], Memory.ROMName);
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memcpy (savebuffer + offset, sramcomment, 64);
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offset += 64;
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/*** Copy SRAM size ***/
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size = Memory.SRAMSize ? (1 << (Memory.SRAMSize + 3)) * 128 : 0;
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if (size > 0x20000)
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size = 0x20000;
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memcpy (savebuffer + offset, &size, 4);
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offset += 4;
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/*** Copy SRAM ***/
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if (size != 0)
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{
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memcpy (savebuffer + offset, Memory.SRAM, size);
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offset += size;
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}
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// /*** Save Joypad Configuration ***/
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// memcpy (savebuffer + offset, &currconfig, 16);
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offset += 16;
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// memcpy (savebuffer + offset, &padcal, 4);
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offset += 4;
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return offset;
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}
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/****************************************************************************
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* Prepare Exportable SRAM Save Data
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* Prepare SRAM Save Data
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*
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* This sets up the save buffer for saving in a format compatible with
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* snes9x on other platforms. This is used when saving to SD / USB / SMB.
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****************************************************************************/
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int
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prepareEXPORTsavedata ()
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preparesavedata (int method)
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{
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int offset = 0;
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int size;
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ClearSaveBuffer ();
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/*** Copy in the sramcomments ***/
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sprintf (sramcomment[1], "%s", Memory.ROMName);
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if(method == METHOD_MC_SLOTA || method == METHOD_MC_SLOTB)
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{
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// Copy in save icon
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memcpy (savebuffer, saveicon, sizeof(saveicon));
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offset += sizeof (saveicon);
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}
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// Copy in the sramcomments
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sprintf (sramcomment[0], "%s SRAM", VERSIONSTR);
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sprintf (sramcomment[1], Memory.ROMName);
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memcpy (savebuffer + offset, sramcomment, 64);
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offset += 64;
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// /*** Save Joypad Configuration ***/
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// memcpy (savebuffer + offset, &currconfig, 16);
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offset += 16;
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// memcpy (savebuffer + offset, &padcal, 4);
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offset += 4;
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if ( offset <= 512 )
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if(method != METHOD_MC_SLOTA && method != METHOD_MC_SLOTB)
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{
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// make it a 512 byte header so it is compatible with other platforms
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if (offset <= 512)
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offset = 512;
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// header was longer than 512 bytes - hopefully this never happens!
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else
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return 0;
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}
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/*** Copy in the SRAM ***/
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// Copy in the SRAM
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size = Memory.SRAMSize ? (1 << (Memory.SRAMSize + 3)) * 128 : 0;
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if (size > 0x20000)
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@ -122,118 +82,56 @@ prepareEXPORTsavedata ()
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return offset;
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}
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else
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{
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// header was longer than 512 bytes - hopefully this never happens!
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return 0;
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}
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}
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/****************************************************************************
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* Decode Save Data
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****************************************************************************/
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void
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decodesavedata (int readsize)
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decodesavedata (int method, int readsize)
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{
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int offset;
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int size;
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char sramcomment[32];
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char sramsavecomment[32];
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// Check for exportable format sram - it has the sram comment at the start
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memcpy (sramcomment, savebuffer, 32);
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if ( (strncmp (sramcomment, "Snes9x GX 2.0", 13) == 0) || (strncmp (sramcomment, "Snes9x GX 00", 12) == 0) ) // version 2.0.XX or 00x
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{
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offset = 64;
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// Get the control pad configuration
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// memcpy (&currconfig, savebuffer + offset, 16);
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offset += 16;
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// memcpy (&padcal, savebuffer + offset, 4);
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offset += 4;
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// for (size = 0; size < 4; size++)
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// gcpadmap[size] = padmap[currconfig[size]];
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// move to start of SRAM which is after the 512 byte header
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offset = 512;
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// import the SRAM
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size = Memory.SRAMSize ? (1 << (Memory.SRAMSize + 3)) * 128 : 0;
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int size = Memory.SRAMSize ? (1 << (Memory.SRAMSize + 3)) * 128 : 0;
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if (size > 0x20000)
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size = 0x20000;
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memcpy (Memory.SRAM, savebuffer + offset, size);
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offset += size;
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}
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else
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{
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// else, check for a v2.0 memory card format save
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// memory card save
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if(method == METHOD_MC_SLOTA || method == METHOD_MC_SLOTB)
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offset = sizeof (saveicon);
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memcpy (sramcomment, savebuffer + offset, 32);
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if ( strncmp (sramcomment, "Snes9x GX 2.0", 13) == 0 )
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{
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//WaitPrompt((char*) "Memory Card format save");
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offset += 64;
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memcpy (&size, savebuffer + offset, 4);
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offset += 4;
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memcpy (Memory.SRAM, savebuffer + offset, size);
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offset += size;
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// If it is an old 2.0 format save, skip over the Settings as we
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// don't save them in SRAM now
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if ( strcmp (sramcomment, "Snes9x GX 2.0") == 0 )
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offset += sizeof (Settings);
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// Get the control pad configuration
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// memcpy (&currconfig, savebuffer + offset, 16);
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offset += 16;
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// memcpy (&padcal, savebuffer + offset, 4);
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offset += 4;
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// for (size = 0; size < 4; size++)
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// gcpadmap[size] = padmap[currconfig[size]];
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}
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else if ( strncmp (sramcomment, "Snes9x 1.43 SRAM (GX", 20) == 0)
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{
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// it's an older SnesGx memory card format save
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size = Memory.SRAMSize ? ( 1 << (Memory.SRAMSize + 3)) * 128 : 0;
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// import the SRAM
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if ( size )
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memcpy(&Memory.SRAM[0], &savebuffer[sizeof(saveicon)+68], size);
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// Ignore the settings saved in the file
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// NOTE: need to add import of joypad config?? Nah.
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}
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// move to start of SRAM which is after the 512 byte header
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else
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{
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// else, check for SRAM from other version/platform of snes9x
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size = Memory.SRAMSize ? (1 << (Memory.SRAMSize + 3)) * 128 : 0;
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offset = 512;
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if ( readsize == size || readsize == size + SRTC_SRAM_PAD)
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// Check for exportable format sram - it has the sram comment at the start
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memcpy (sramsavecomment, savebuffer+offset, 32);
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// version 2.0.XX or 00x found!
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if ( (strncmp (sramsavecomment, "Snes9x GX 2.0", 13) == 0)
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|| (strncmp (sramsavecomment, "Snes9x GX 00", 12) == 0) )
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{
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// import the SRAM
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memcpy (Memory.SRAM, savebuffer + offset, size);
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}
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// check for SRAM from other version/platform of snes9x
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else if ( readsize == size || readsize == size + SRTC_SRAM_PAD)
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{
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//WaitPrompt("readsize=size or + SRTC_SRAM_PAD");
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// SRAM data should be at the start of the file, just import it and
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// ignore anything after the SRAM
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memcpy (Memory.SRAM, savebuffer, size);
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}
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else if ( readsize == size + 512 )
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{
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//WaitPrompt("readsize=size+512");
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// SRAM has a 512 byte header - remove it, then import the SRAM,
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// ignoring anything after the SRAM
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memmove (savebuffer, savebuffer + 512, size);
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memcpy (Memory.SRAM, savebuffer, size);
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memcpy(Memory.SRAM, savebuffer+512, size);
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}
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else
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{
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WaitPrompt((char*)"Incompatible SRAM save!");
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}
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}
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}
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/****************************************************************************
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* Load SRAM
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@ -272,7 +170,7 @@ LoadSRAM (int method, bool silent)
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if (offset > 0)
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{
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decodesavedata (offset);
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decodesavedata (method, offset);
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S9xSoftReset();
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return 1;
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}
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@ -300,10 +198,7 @@ SaveSRAM (int method, bool silent)
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int datasize;
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int offset = 0;
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if(method == METHOD_MC_SLOTA || method == METHOD_MC_SLOTB)
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datasize = prepareMCsavedata ();
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else
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datasize = prepareEXPORTsavedata ();
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datasize = preparesavedata (method);
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if ( datasize )
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{
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