93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
/* FCE Ultra - NES/Famicom Emulator
|
|
*
|
|
* Copyright notice for this file:
|
|
* Copyright (C) 2006 CaH4e3
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
* FDS Conversion
|
|
*
|
|
*/
|
|
|
|
#include "mapinc.h"
|
|
|
|
static uint8 reg, swap;
|
|
static uint32 IRQCount, IRQa;
|
|
|
|
static SFORMAT StateRegs[] =
|
|
{
|
|
{ &IRQCount, 4, "IRQC" },
|
|
{ &IRQa, 4, "IRQA" },
|
|
{ ®, 1, "REG" },
|
|
{ &swap, 1, "SWAP" },
|
|
{ 0 }
|
|
};
|
|
|
|
static void Sync(void) {
|
|
setprg4(0x5000, 8 << 1); /* Only YS-612 advanced version */
|
|
setprg8(0x6000, swap?0:2);
|
|
setprg8(0x8000, 1);
|
|
setprg8(0xa000, 0);
|
|
setprg8(0xc000, reg);
|
|
setprg8(0xe000, swap?8:9); /* hard dump for mr.Mary is 128K,
|
|
* bank 9 is the last 2K ok bank 8 repeated 4 times, then till the end of 128K
|
|
* instead used bank A, containing some CHR data, ines rom have unused banks removed,
|
|
* and bank A moved to the bank 9 place for compatibility with other crappy dumps
|
|
*/
|
|
setchr8(0);
|
|
}
|
|
|
|
static DECLFW(M43Write) {
|
|
/* int transo[8]={4,3,4,4,4,7,5,6}; */
|
|
int transo[8] = { 4, 3, 5, 3, 6, 3, 7, 3 }; /* According to hardware tests */
|
|
switch (A & 0xf1ff) {
|
|
case 0x4022: reg = transo[V & 7]; Sync(); break;
|
|
case 0x4120: swap = V & 1; Sync(); break;
|
|
case 0x8122: /* hacked version */
|
|
case 0x4122: IRQa = V & 1; X6502_IRQEnd(FCEU_IQEXT); IRQCount = 0; break; /* original version */
|
|
}
|
|
}
|
|
|
|
static void M43Power(void) {
|
|
reg = swap = 0;
|
|
Sync();
|
|
SetReadHandler(0x5000, 0xffff, CartBR);
|
|
SetWriteHandler(0x4020, 0xffff, M43Write);
|
|
}
|
|
|
|
static void M43Reset(void) {
|
|
}
|
|
|
|
static void FP_FASTAPASS(1) M43IRQHook(int a) {
|
|
IRQCount += a;
|
|
if (IRQa)
|
|
if (IRQCount >= 4096) {
|
|
IRQa = 0;
|
|
X6502_IRQBegin(FCEU_IQEXT);
|
|
}
|
|
}
|
|
|
|
static void StateRestore(int version) {
|
|
Sync();
|
|
}
|
|
|
|
void Mapper43_Init(CartInfo *info) {
|
|
info->Reset = M43Reset;
|
|
info->Power = M43Power;
|
|
MapIRQHook = M43IRQHook;
|
|
GameStateRestore = StateRestore;
|
|
AddExState(&StateRegs, ~0, 0, 0);
|
|
}
|