mirror of
https://github.com/dborth/fceugx.git
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82 lines
3.1 KiB
C++
82 lines
3.1 KiB
C++
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/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2007 CaH4e3
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "mapinc.h"
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#include "mmc3.h"
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static DECLFW(UNLA9746Write)
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{
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// FCEU_printf("write raw %04x:%02x\n",A,V);
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switch (A&0xE003)
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{
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case 0x8000: EXPREGS[1]=V; EXPREGS[0]=0; break;
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case 0x8002: EXPREGS[0]=V; EXPREGS[1]=0; break;
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case 0x8001: {
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uint8 bits_rev = ((V&0x20)>>5)|((V&0x10)>>3)|((V&0x08)>>1)|((V&0x04)<<1);
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switch(EXPREGS[0])
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{
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case 0x26: setprg8(0x8000, bits_rev); break;
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case 0x25: setprg8(0xA000, bits_rev); break;
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case 0x24: setprg8(0xC000, bits_rev); break;
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case 0x23: setprg8(0xE000, bits_rev); break;
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}
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switch(EXPREGS[1])
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{
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case 0x0a:
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case 0x08: EXPREGS[2] = (V << 4); break;
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case 0x09: setchr1(0x0000, EXPREGS[2]|(V >> 1)); break;
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case 0x0b: setchr1(0x0400, EXPREGS[2]|(V >> 1)|1); break;
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case 0x0c:
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case 0x0e: EXPREGS[2] = (V << 4); break;
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case 0x0d: setchr1(0x0800, EXPREGS[2]|(V >> 1)); break;
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case 0x0f: setchr1(0x0c00, EXPREGS[2]|(V >> 1)|1); break;
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case 0x10:
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case 0x12: EXPREGS[2] = (V << 4); break;
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case 0x11: setchr1(0x1000, EXPREGS[2]|(V >> 1)); break;
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case 0x14:
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case 0x16: EXPREGS[2] = (V << 4); break;
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case 0x15: setchr1(0x1400, EXPREGS[2]|(V >> 1)); break;
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case 0x18:
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case 0x1a: EXPREGS[2] = (V << 4); break;
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case 0x19: setchr1(0x1800, EXPREGS[2]|(V >> 1)); break;
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case 0x1c:
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case 0x1e: EXPREGS[2] = (V << 4); break;
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case 0x1d: setchr1(0x1c00, EXPREGS[2]|(V >> 1)); break;
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}
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}
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break;
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}
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}
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static void UNLA9746Power(void)
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{
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GenMMC3Power();
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SetWriteHandler(0x8000,0xbfff,UNLA9746Write);
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}
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void UNLA9746_Init(CartInfo *info)
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{
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GenMMC3_Init(info, 128, 256, 0, 0);
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info->Power=UNLA9746Power;
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AddExState(EXPREGS, 6, 0, "EXPR");
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}
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