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Added basic texture slot handling.

This commit is contained in:
masscat 2007-04-25 16:32:32 +00:00
parent eeb6d847e9
commit 3802362545
1 changed files with 32 additions and 0 deletions
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32
desmume/src/MMU.c
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@ -199,6 +199,7 @@ void MMU_Init(void) {
mc_init(&MMU.bupmem, MC_TYPE_AUTODETECT);
mc_alloc(&MMU.bupmem, 1);
MMU.bupmem.fp = NULL;
}
void MMU_DeInit(void) {
@ -240,6 +241,8 @@ void MMU_clearMem()
memset(ARM9Mem.ARM9_WRAM, 0, 0x01000000);
memset(ARM9Mem.MAIN_MEM, 0, 0x400000);
memset(ARM9Mem.blank_memory, 0, 0x020000);
memset(MMU.ARM7_ERAM, 0, 0x010000);
memset(MMU.ARM7_REG, 0, 0x010000);
@ -268,6 +271,19 @@ void MMU_clearMem()
MainScreen.offset = 192;
SubScreen.offset = 0;
/* setup the texture slot pointers */
#if 0
ARM9Mem.textureSlotAddr[0] = ARM9Mem.blank_memory;
ARM9Mem.textureSlotAddr[1] = ARM9Mem.blank_memory;
ARM9Mem.textureSlotAddr[2] = ARM9Mem.blank_memory;
ARM9Mem.textureSlotAddr[3] = ARM9Mem.blank_memory;
#else
ARM9Mem.textureSlotAddr[0] = &ARM9Mem.ARM9_LCD[0x20000 * 0];
ARM9Mem.textureSlotAddr[1] = &ARM9Mem.ARM9_LCD[0x20000 * 1];
ARM9Mem.textureSlotAddr[2] = &ARM9Mem.ARM9_LCD[0x20000 * 2];
ARM9Mem.textureSlotAddr[3] = &ARM9Mem.ARM9_LCD[0x20000 * 3];
#endif
}
/* the VRAM blocks keep their content even when not blended in */
@ -901,6 +917,22 @@ void FASTCALL MMU_write8(u32 proc, u32 adr, u8 val)
MMU.vram_mode[adr-REG_VRAMCNTA] = 4 | (adr-REG_VRAMCNTA) ;
break ;
}
/*
* FIXME: simply texture slot handling
* This is a first stab and is not correct. It does
* not handle a VRAM texture slot becoming
* unconfigured.
* Revisit all of VRAM control handling for future
* release?
*/
if ( val & 0x80) {
if ( (val & 0x7) == 3) {
int slot_index = (val >> 3) & 0x3;
ARM9Mem.textureSlotAddr[slot_index] =
&ARM9Mem.ARM9_LCD[0x20000 * (adr - REG_VRAMCNTA)];
}
}
MMU_VRAMReloadFromLCD(adr-REG_VRAMCNTA,val) ;
}
break;