mirror of
https://github.com/dborth/fceugx.git
synced 2024-11-01 15:05:05 +01:00
76 lines
2.5 KiB
C++
76 lines
2.5 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
|
|
*/
|
|
|
|
#include "mapinc.h"
|
|
#include "mmc3.h"
|
|
|
|
static DECLFW(UNLA9746Write) {
|
|
// FCEU_printf("write raw %04x:%02x\n",A,V);
|
|
switch (A & 0xE003) {
|
|
case 0x8000: EXPREGS[1] = V; EXPREGS[0] = 0; break;
|
|
case 0x8002: EXPREGS[0] = V; EXPREGS[1] = 0; break;
|
|
case 0x8001:
|
|
{
|
|
uint8 bits_rev = ((V & 0x20) >> 5) | ((V & 0x10) >> 3) | ((V & 0x08) >> 1) | ((V & 0x04) << 1);
|
|
switch (EXPREGS[0]) {
|
|
case 0x26: setprg8(0x8000, bits_rev); break;
|
|
case 0x25: setprg8(0xA000, bits_rev); break;
|
|
case 0x24: setprg8(0xC000, bits_rev); break;
|
|
case 0x23: setprg8(0xE000, bits_rev); break;
|
|
}
|
|
switch (EXPREGS[1]) {
|
|
case 0x0a:
|
|
case 0x08: EXPREGS[2] = (V << 4); break;
|
|
case 0x09: setchr1(0x0000, EXPREGS[2] | (V >> 1)); break;
|
|
case 0x0b: setchr1(0x0400, EXPREGS[2] | (V >> 1) | 1); break;
|
|
case 0x0c:
|
|
case 0x0e: EXPREGS[2] = (V << 4); break;
|
|
case 0x0d: setchr1(0x0800, EXPREGS[2] | (V >> 1)); break;
|
|
case 0x0f: setchr1(0x0c00, EXPREGS[2] | (V >> 1) | 1); break;
|
|
case 0x10:
|
|
case 0x12: EXPREGS[2] = (V << 4); break;
|
|
case 0x11: setchr1(0x1000, EXPREGS[2] | (V >> 1)); break;
|
|
case 0x14:
|
|
case 0x16: EXPREGS[2] = (V << 4); break;
|
|
case 0x15: setchr1(0x1400, EXPREGS[2] | (V >> 1)); break;
|
|
case 0x18:
|
|
case 0x1a: EXPREGS[2] = (V << 4); break;
|
|
case 0x19: setchr1(0x1800, EXPREGS[2] | (V >> 1)); break;
|
|
case 0x1c:
|
|
case 0x1e: EXPREGS[2] = (V << 4); break;
|
|
case 0x1d: setchr1(0x1c00, EXPREGS[2] | (V >> 1)); break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void UNLA9746Power(void) {
|
|
GenMMC3Power();
|
|
SetWriteHandler(0x8000, 0xbfff, UNLA9746Write);
|
|
}
|
|
|
|
void UNLA9746_Init(CartInfo *info) {
|
|
GenMMC3_Init(info, 128, 256, 0, 0);
|
|
info->Power = UNLA9746Power;
|
|
AddExState(EXPREGS, 6, 0, "EXPR");
|
|
}
|
|
|