mirror of
https://github.com/dborth/fceugx.git
synced 2024-11-01 06:55:05 +01:00
125 lines
3.8 KiB
C++
125 lines
3.8 KiB
C++
/* FCE Ultra - NES/Famicom Emulator
|
|
*
|
|
* Copyright notice for this file:
|
|
* Copyright (C) 2007 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
|
|
*
|
|
* City Fighter IV sith Sound VRC4 hacked
|
|
*/
|
|
|
|
#include "mapinc.h"
|
|
|
|
static int32 IRQCount;
|
|
static uint8 IRQa;
|
|
static uint8 prg_reg, prg_mode, mirr;
|
|
static uint8 chr_reg[8];
|
|
static writefunc pcmwrite;
|
|
|
|
static SFORMAT StateRegs[] =
|
|
{
|
|
{ &IRQCount, 4, "IRQC" },
|
|
{ &IRQa, 1, "IRQA" },
|
|
{ &prg_reg, 1, "PREG" },
|
|
{ &prg_mode, 1, "PMOD" },
|
|
{ &mirr, 1, "MIRR" },
|
|
{ chr_reg, 8, "CREG" },
|
|
{ 0 }
|
|
};
|
|
|
|
static void Sync(void) {
|
|
setprg32(0x8000, prg_reg >> 2);
|
|
if (!prg_mode)
|
|
setprg8(0xC000, prg_reg);
|
|
int i;
|
|
for (i = 0; i < 8; i++)
|
|
setchr1(i << 10, chr_reg[i]);
|
|
switch (mirr) {
|
|
case 0: setmirror(MI_V); break;
|
|
case 1: setmirror(MI_H); break;
|
|
case 2: setmirror(MI_0); break;
|
|
case 3: setmirror(MI_1); break;
|
|
}
|
|
}
|
|
|
|
static DECLFW(UNLCITYFIGHTWrite) {
|
|
//FCEU_printf("%04x %02x",A,V);
|
|
switch (A & 0xF00C) {
|
|
case 0x9000: prg_reg = V & 0xC; mirr = V & 3; break;
|
|
case 0x9004:
|
|
case 0x9008:
|
|
case 0x900C:
|
|
if (A & 0x800)
|
|
pcmwrite(0x4011, (V & 0xf) << 3);
|
|
else
|
|
prg_reg = V & 0xC;
|
|
break;
|
|
case 0xC000:
|
|
case 0xC004:
|
|
case 0xC008:
|
|
case 0xC00C: prg_mode = V & 1; break;
|
|
case 0xD000: chr_reg[0] = (chr_reg[0] & 0xF0) | (V & 0x0F); break;
|
|
case 0xD004: chr_reg[0] = (chr_reg[0] & 0x0F) | (V << 4); break;
|
|
case 0xD008: chr_reg[1] = (chr_reg[1] & 0xF0) | (V & 0x0F); break;
|
|
case 0xD00C: chr_reg[1] = (chr_reg[1] & 0x0F) | (V << 4); break;
|
|
case 0xA000: chr_reg[2] = (chr_reg[2] & 0xF0) | (V & 0x0F); break;
|
|
case 0xA004: chr_reg[2] = (chr_reg[2] & 0x0F) | (V << 4); break;
|
|
case 0xA008: chr_reg[3] = (chr_reg[3] & 0xF0) | (V & 0x0F); break;
|
|
case 0xA00C: chr_reg[3] = (chr_reg[3] & 0x0F) | (V << 4); break;
|
|
case 0xB000: chr_reg[4] = (chr_reg[4] & 0xF0) | (V & 0x0F); break;
|
|
case 0xB004: chr_reg[4] = (chr_reg[4] & 0x0F) | (V << 4); break;
|
|
case 0xB008: chr_reg[5] = (chr_reg[5] & 0xF0) | (V & 0x0F); break;
|
|
case 0xB00C: chr_reg[5] = (chr_reg[5] & 0x0F) | (V << 4); break;
|
|
case 0xE000: chr_reg[6] = (chr_reg[6] & 0xF0) | (V & 0x0F); break;
|
|
case 0xE004: chr_reg[6] = (chr_reg[6] & 0x0F) | (V << 4); break;
|
|
case 0xE008: chr_reg[7] = (chr_reg[7] & 0xF0) | (V & 0x0F); break;
|
|
case 0xE00C: chr_reg[7] = (chr_reg[7] & 0x0F) | (V << 4); break;
|
|
case 0xF000: IRQCount = ((IRQCount & 0x1E0) | ((V & 0xF) << 1)); break;
|
|
case 0xF004: IRQCount = ((IRQCount & 0x1E) | ((V & 0xF) << 5)); break;
|
|
case 0xF008: IRQa = V & 2; X6502_IRQEnd(FCEU_IQEXT); break;
|
|
default:
|
|
break;
|
|
}
|
|
Sync();
|
|
}
|
|
|
|
static void UNLCITYFIGHTIRQ(int a) {
|
|
if (IRQa) {
|
|
IRQCount -= a;
|
|
if (IRQCount <= 0) {
|
|
X6502_IRQBegin(FCEU_IQEXT);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void UNLCITYFIGHTPower(void) {
|
|
prg_reg = 0;
|
|
Sync();
|
|
pcmwrite = GetWriteHandler(0x4011);
|
|
SetReadHandler(0x8000, 0xFFFF, CartBR);
|
|
SetWriteHandler(0x8000, 0xFFFF, UNLCITYFIGHTWrite);
|
|
}
|
|
|
|
static void StateRestore(int version) {
|
|
Sync();
|
|
}
|
|
|
|
void UNLCITYFIGHT_Init(CartInfo *info) {
|
|
info->Power = UNLCITYFIGHTPower;
|
|
MapIRQHook = UNLCITYFIGHTIRQ;
|
|
GameStateRestore = StateRestore;
|
|
AddExState(&StateRegs, ~0, 0, 0);
|
|
}
|