Implement mappers 28, 29, 31, 56, 63, 255, BMC-60311C, BMC-WS, BMC-HPxx
- Added a few mappers to the list. Tested with roms from goodnes set and some demos - Fix IRQ for Kaiser7032/202 - Issue noticeable with SMB2/3's status status bar
This commit is contained in:
retro-wertz
187
src/boards/28.c
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187
src/boards/28.c
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/*
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* Copyright (C) 2012-2017 FCEUX team
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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,
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* MA 02110-1301, USA.
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*
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*/
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/* added 2019-5-23
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* Mapper 28 - Action 53
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* http://wiki.nesdev.com/w/index.php/INES_Mapper_028 */
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#include "mapinc.h"
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static uint8 prg_mask_16k;
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static uint8 reg, chr, prg, mode, outer;
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static SFORMAT StateRegs[] = {
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{®, 1, "REG"},
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{&chr, 1, "CHR"},
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{&prg, 1, "PRG"},
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{&mode, 1, "MODE"},
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{&outer, 1, "OUTR"},
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{0}
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};
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void SyncMirror() {
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switch (mode & 3) {
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case 0: setmirror(MI_0); break;
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case 1: setmirror(MI_1); break;
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case 2: setmirror(MI_V); break;
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case 3: setmirror(MI_H); break;
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}
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}
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void Mirror(uint8 value)
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{
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if ((mode & 2) == 0) {
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mode &= 0xfe;
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mode |= value >> 4 & 1;
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}
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SyncMirror();
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}
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static void Sync() {
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uint8 prglo;
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uint8 prghi;
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uint8 outb = outer << 1;
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/* this can probably be rolled up, but i have no motivation to do so
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* until it's been tested */
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switch (mode & 0x3c) {
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/* 32K modes */
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case 0x00:
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case 0x04:
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prglo = outb;
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prghi = outb | 1;
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break;
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case 0x10:
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case 0x14:
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prglo = outb & ~2 | prg << 1 & 2;
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prghi = outb & ~2 | prg << 1 & 2 | 1;
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break;
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case 0x20:
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case 0x24:
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prglo = outb & ~6 | prg << 1 & 6;
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prghi = outb & ~6 | prg << 1 & 6 | 1;
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break;
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case 0x30:
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case 0x34:
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prglo = outb & ~14 | prg << 1 & 14;
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prghi = outb & ~14 | prg << 1 & 14 | 1;
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break;
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/* bottom fixed modes */
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case 0x08:
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prglo = outb;
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prghi = outb | prg & 1;
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break;
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case 0x18:
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prglo = outb;
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prghi = outb & ~2 | prg & 3;
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break;
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case 0x28:
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prglo = outb;
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prghi = outb & ~6 | prg & 7;
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break;
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case 0x38:
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prglo = outb;
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prghi = outb & ~14 | prg & 15;
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break;
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/* top fixed modes */
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case 0x0c:
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prglo = outb | prg & 1;
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prghi = outb | 1;
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break;
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case 0x1c:
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prglo = outb & ~2 | prg & 3;
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prghi = outb | 1;
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break;
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case 0x2c:
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prglo = outb & ~6 | prg & 7;
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prghi = outb | 1;
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break;
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case 0x3c:
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prglo = outb & ~14 | prg & 15;
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prghi = outb | 1;
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break;
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}
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prglo &= prg_mask_16k;
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prghi &= prg_mask_16k;
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setprg16(0x8000, prglo);
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setprg16(0xC000, prghi);
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setchr8(chr);
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}
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static DECLFW(WriteEXP) {
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reg = V & 0x81;
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}
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static DECLFW(WritePRG) {
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switch (reg) {
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case 0x00:
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chr = V & 3;
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Mirror(V);
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Sync();
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break;
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case 0x01:
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prg = V & 15;
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Mirror(V);
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Sync();
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break;
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case 0x80:
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mode = V & 63;
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SyncMirror();
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Sync();
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break;
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case 0x81:
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outer = V & 63;
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Sync();
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break;
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}
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}
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static void M28Power(void) {
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outer = 63;
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prg = 15;
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Sync();
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prg_mask_16k = PRGsize[0] - 1;
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SetWriteHandler(0x5000,0x5FFF,WriteEXP);
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SetWriteHandler(0x8000,0xFFFF,WritePRG);
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SetReadHandler(0x8000,0xFFFF,CartBR);
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SetReadHandler(0x6000,0x7FFF,CartBR);
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SetWriteHandler(0x6000,0x7FFF,CartBW);
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}
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static void M28Reset(void) {
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outer = 63;
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prg = 15;
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Sync();
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}
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static void StateRestore(int version) {
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Sync();
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}
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void Mapper28_Init(CartInfo* info) {
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info->Power=M28Power;
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info->Reset=M28Reset;
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GameStateRestore=StateRestore;
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AddExState(&StateRegs, ~0, 0, 0);
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}
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