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updated mapper253 to the point where the title screen displays ok, gameplay is still b0rked though

This commit is contained in:
qeed 2009-10-06 00:50:42 +00:00
parent ec6398fd6e
commit 36d61a2b2c
1 changed files with 15 additions and 10 deletions
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25
src/mappers/253.cpp
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@ -1,10 +1,10 @@
//Thanks to VirtualNES developer for reverse engineering this mapper //Thanks to VirtualNES developer for reverse engineering this mapper
//first screen add 32 to chr
//second screen at 0x42000
#include "mapinc.h" #include "mapinc.h"
static uint8 reg[9]; static uint8 reg[9], VRAM_switch;
static uint8 irq_enable, irq_counter, irq_latch, irq_clock; static int32 irq_enable, irq_counter, irq_latch, irq_clock;
static uint8 VRAM_switch;
static void Mapper253_IRQHook(int cycles) static void Mapper253_IRQHook(int cycles)
{ {
@ -40,13 +40,17 @@ static void SetBank_PPUSUB(int bank, int page)
} }
if ((page == 4) || (page == 5)) if ((page == 4) || (page == 5))
{ {
printf("Page in 4 5: %d\n", page);
if(VRAM_switch == 0) if(VRAM_switch == 0)
setchr1( bank, page ); //CHR-ROM setchr1( bank << 10, page ); //CHR-ROM
else else
setchr1( bank, page ); //CHR-RAM setchr1( bank << 10, page ); //CHR-RAM
} }
else else
setchr1( bank, page ); {
printf("Page: %d\n", page);
setchr1(bank << 10, page);
}
} }
static DECLFW(Mapper253_Write) static DECLFW(Mapper253_Write)
@ -166,7 +170,8 @@ static DECLFW(Mapper253_Write)
X6502_IRQEnd(FCEU_IQEXT); X6502_IRQEnd(FCEU_IQEXT);
break; break;
default: default:
printf("Not handled 0x%X 0x%X", A, V); break;
//printf("Not handled 0x%X 0x%X", A, V);
} }
} }
@ -185,8 +190,8 @@ static void Mapper253_Power(void)
setprg16(0x8000, 0); //first bank setprg16(0x8000, 0); //first bank
setprg16(0xC000, head.ROM_size - 1); //last bank setprg16(0xC000, head.ROM_size - 1); //last bank
setchr8(0); //first bank setchr8(0);
SetWriteHandler(0x8000, 0xFFFF, Mapper253_Write); SetWriteHandler(0x8000, 0xFFFF, Mapper253_Write);
SetReadHandler(0x8000, 0xFFFF, CartBR); SetReadHandler(0x8000, 0xFFFF, CartBR);
} }