| 1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2002 Ben Parnell |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | |
| 21 | /* Not finished. Darn evil game... *Mumble*... */ |
| 22 | |
| 23 | #include "mapinc.h" |
| 24 | |
| 25 | static uint8 cmd; |
| 26 | static uint8 regs[8]; |
| 27 | |
| 28 | static void DoPRG(void) |
| 29 | { |
| 30 | if(cmd&0x40) |
| 31 | { |
| 32 | setprg8(0xC000,regs[4]); |
| 33 | setprg8(0xA000,regs[5]); |
| 34 | setprg8(0x8000,~1); |
| 35 | setprg8(0xE000,~0); |
| 36 | } |
| 37 | else |
| 38 | { |
| 39 | setprg8(0x8000,regs[4]); |
| 40 | setprg8(0xA000,regs[5]); |
| 41 | setprg8(0xC000,~1); |
| 42 | setprg8(0xE000,~0); |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | static void DoCHR(void) |
| 47 | { |
| 48 | uint32 base=(cmd&0x80)<<5; |
| 49 | |
| 50 | setchr2(0x0000^base,regs[0]); |
| 51 | setchr2(0x0800^base,regs[2]); |
| 52 | |
| 53 | setchr1(0x1000^base,regs[6]); |
| 54 | setchr1(0x1400^base,regs[1]); |
| 55 | setchr1(0x1800^base,regs[7]); |
| 56 | setchr1(0x1c00^base,regs[3]); |
| 57 | } |
| 58 | |
| 59 | static DECLFW(H2288Write) |
| 60 | { |
| 61 | //printf("$%04x:$%02x, $%04x\n",A,V,X.PC.W); |
| 62 | //RAM[0x7FB]=0x60; |
| 63 | switch(A&0xE001) |
| 64 | { |
| 65 | case 0xa000:setmirror((V&1)^1);break; |
| 66 | case 0x8000:// DumpMem("out",0x0000,0xFFFF); |
| 67 | cmd=V;DoPRG();DoCHR(); |
| 68 | X6502_Rebase();break; |
| 69 | case 0x8001:regs[cmd&7]=V; |
| 70 | if((cmd&7)==4 || (cmd&7)==5) { |
| 71 | DoPRG(); |
| 72 | X6502_Rebase(); |
| 73 | } else |
| 74 | DoCHR(); |
| 75 | break; |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | static DECLFR(H2288Read) |
| 80 | { |
| 81 | //printf("Rd: $%04x, $%04x\n",A,X.PC.W); |
| 82 | return((X.DB&0xFE)|(A&(A>>8))); |
| 83 | } |
| 84 | |
| 85 | static void H2288Reset(void) |
| 86 | { |
| 87 | int x; |
| 88 | |
| 89 | SetReadHandler(0x5800,0x5FFF,H2288Read); |
| 90 | SetReadHandler(0x8000,0xFFFF,CartBR); |
| 91 | SetWriteHandler(0x8000,0xFFFF,H2288Write); |
| 92 | for(x=0;x<8;x++) regs[x]=0; |
| 93 | cmd=0; |
| 94 | DoPRG(); |
| 95 | DoCHR(); |
| 96 | } |
| 97 | |
| 98 | void H2288_Init(void) |
| 99 | { |
| 100 | BoardPower=H2288Reset; |
| 101 | } |