1 /* FCE Ultra - NES/Famicom Emulator
2 *
3 * Copyright notice for this file:
4 * Copyright (C) 2008 CaH4e3
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 /* T-227-1, 820632, MMC3 based, multimenu, 60000in1 (0010) dip switches */
22
23 #include "mapinc.h"
24 #include "mmc3.h"
25
26 static uint8 reset_flag = 0x07;
27
BMCT2271CW(uint32 A,uint8 V)28 static void BMCT2271CW(uint32 A, uint8 V) {
29 uint32 va = V;
30 if (EXPREGS[0] & 0x20) {
31 va |= 0x200;
32 va |= (EXPREGS[0] & 0x10) << 4;
33 } else {
34 va &= 0x7F;
35 va |= (EXPREGS[0] & 0x18) << 4;
36 }
37 setchr1(A, va);
38 }
39
BMCT2271PW(uint32 A,uint8 V)40 static void BMCT2271PW(uint32 A, uint8 V) {
41 uint32 va = V & 0x3F;
42 if (EXPREGS[0] & 0x20) {
43 va &= 0x1F;
44 va |= 0x40;
45 va |= (EXPREGS[0] & 0x10) << 1;
46 } else {
47 va &= 0x0F;
48 va |= (EXPREGS[0] & 0x18) << 1;
49 }
50 switch (EXPREGS[0] & 3) {
51 case 0x00: setprg8(A, va); break;
52 case 0x02:
53 {
54 va = (va & 0xFD) | ((EXPREGS[0] & 4) >> 1);
55 if (A < 0xC000) {
56 setprg16(0x8000, va >> 1);
57 setprg16(0xC000, va >> 1);
58 }
59 break;
60 }
61 case 0x01:
62 case 0x03: if (A < 0xC000) setprg32(0x8000, va >> 2); break;
63 }
64 }
65
DECLFW(BMCT2271LoWrite)66 static DECLFW(BMCT2271LoWrite) {
67 if (!(EXPREGS[0] & 0x80))
68 EXPREGS[0] = A & 0xFF;
69 FixMMC3PRG(MMC3_cmd);
70 FixMMC3CHR(MMC3_cmd);
71 }
72
DECLFR(BMCT2271HiRead)73 static DECLFR(BMCT2271HiRead) {
74 uint32 av = A;
75 if (EXPREGS[0] & 0x40) av = (av & 0xFFF0) | reset_flag;
76 return CartBR(av);
77 }
78
BMCT2271Reset(void)79 static void BMCT2271Reset(void) {
80 EXPREGS[0] = 0x00;
81 reset_flag++;
82 reset_flag &= 0x0F;
83 MMC3RegReset();
84 }
85
BMCT2271Power(void)86 static void BMCT2271Power(void) {
87 EXPREGS[0] = 0x00;
88 GenMMC3Power();
89 SetWriteHandler(0x6000, 0x7FFF, BMCT2271LoWrite);
90 SetReadHandler(0x8000, 0xFFFF, BMCT2271HiRead);
91 }
92
BMCT2271_Init(CartInfo * info)93 void BMCT2271_Init(CartInfo *info) {
94 GenMMC3_Init(info, 128, 128, 8, 0);
95 pwrap = BMCT2271PW;
96 cwrap = BMCT2271CW;
97 info->Power = BMCT2271Power;
98 info->Reset = BMCT2271Reset;
99 AddExState(EXPREGS, 1, 0, "EXPR");
100 }
101