345 lines
7.5 KiB
C
345 lines
7.5 KiB
C
/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2002 Xodnizel
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* Copyright (C) 2020
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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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/* 2020-2-3 - updated mapper 150/243 */
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#include "mapinc.h"
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static uint8 cmd, dip;
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static uint8 latch[8];
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static uint8 mapperNum;
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static void S74LS374MSync(uint8 mirr) {
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switch (mirr & 3) {
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case 0: setmirror(MI_V); break;
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case 1: setmirror(MI_H); break;
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case 2: setmirrorw(0, 1, 1, 1); break;
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case 3: setmirror(MI_0); break;
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}
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}
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static int type;
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static void S8259Synco(void) {
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int x;
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setprg32(0x8000, latch[5] & 7);
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if (!UNIFchrrama) { /* No CHR RAM? Then BS'ing is ok. */
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for (x = 0; x < 4; x++) {
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int bank;
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if (latch[7] & 1)
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bank = (latch[0] & 0x7) | ((latch[4] & 7) << 3);
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else
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bank = (latch[x] & 0x7) | ((latch[4] & 7) << 3);
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switch (type) {
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case 00: bank = (bank << 1) | (x & 1); setchr2(0x800 * x, bank); break;
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case 01: setchr2(0x800 * x, bank); break;
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case 02: bank = (bank << 2) | (x & 3); setchr2(0x800 * x, bank); break;
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case 03:
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bank = latch[x] & 7;
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switch (x & 3) {
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case 01: bank |= (latch[4] & 1) << 4; break;
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case 02: bank |= (latch[4] & 2) << 3; break;
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case 03: bank |= ((latch[4] & 4) << 2) | ((latch[6] & 1) << 3); break;
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}
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setchr1(0x400 * x, bank);
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setchr4(0x1000, ~0);
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break;
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}
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}
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}
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if (!(latch[7] & 1))
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S74LS374MSync(latch[7] >> 1);
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else
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setmirror(MI_V);
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}
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static DECLFW(S8259Write) {
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A &= 0x4101;
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if (A == 0x4100)
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cmd = V;
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else {
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latch[cmd & 7] = V;
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S8259Synco();
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}
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}
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static void S8259Reset(void) {
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int x;
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cmd = 0;
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for (x = 0; x < 8; x++) latch[x] = 0;
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setchr8(0);
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S8259Synco();
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0x4100, 0x7FFF, S8259Write);
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}
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static void S8259Restore(int version) {
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S8259Synco();
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}
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void S8259A_Init(CartInfo *info) { /* Kevin's Horton 141 mapper */
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info->Power = S8259Reset;
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GameStateRestore = S8259Restore;
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AddExState(latch, 8, 0, "LATC");
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AddExState(&cmd, 1, 0, "CMD");
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type = 0;
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}
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void S8259B_Init(CartInfo *info) { /* Kevin's Horton 138 mapper */
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info->Power = S8259Reset;
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GameStateRestore = S8259Restore;
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AddExState(latch, 8, 0, "LATC");
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AddExState(&cmd, 1, 0, "CMD");
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type = 1;
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}
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void S8259C_Init(CartInfo *info) { /* Kevin's Horton 139 mapper */
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info->Power = S8259Reset;
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GameStateRestore = S8259Restore;
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AddExState(latch, 8, 0, "LATC");
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AddExState(&cmd, 1, 0, "CMD");
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type = 2;
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}
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void S8259D_Init(CartInfo *info) { /* Kevin's Horton 137 mapper */
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info->Power = S8259Reset;
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GameStateRestore = S8259Restore;
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AddExState(latch, 8, 0, "LATC");
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AddExState(&cmd, 1, 0, "CMD");
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type = 3;
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}
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static void (*WSync)(void);
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static DECLFW(SAWrite) {
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if (A & 0x100) {
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latch[0] = V;
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WSync();
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}
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}
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static void SAPower(void) {
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latch[0] = 0;
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WSync();
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0x4100, 0x5FFF, SAWrite);
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}
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static void SARestore(int version) {
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WSync();
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}
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static DECLFW(SADWrite) {
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latch[0] = V;
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WSync();
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}
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static void SADPower(void) {
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latch[0] = 0;
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WSync();
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0x8000, 0xFFFF, SADWrite);
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}
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static void SA0161MSynco(void) {
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setprg32(0x8000, (latch[0] >> 3) & 1);
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setchr8(latch[0] & 7);
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}
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static void SA72007Synco(void) {
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setprg32(0x8000, 0);
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setchr8(latch[0] >> 7);
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}
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static void SA009Synco(void) {
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setprg32(0x8000, 0);
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setchr8(latch[0] & 1);
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}
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static void SA72008Synco(void) {
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setprg32(0x8000, (latch[0] >> 2) & 1);
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setchr8(latch[0] & 3);
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}
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void SA0161M_Init(CartInfo *info) {
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WSync = SA0161MSynco;
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GameStateRestore = SARestore;
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info->Power = SAPower;
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AddExState(&latch[0], 1, 0, "LATC");
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}
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void SA72007_Init(CartInfo *info) {
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WSync = SA72007Synco;
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GameStateRestore = SARestore;
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info->Power = SAPower;
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AddExState(&latch[0], 1, 0, "LATC");
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}
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void SA72008_Init(CartInfo *info) {
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WSync = SA72008Synco;
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GameStateRestore = SARestore;
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info->Power = SAPower;
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AddExState(&latch[0], 1, 0, "LATC");
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}
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void SA009_Init(CartInfo *info) {
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WSync = SA009Synco;
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GameStateRestore = SARestore;
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info->Power = SAPower;
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AddExState(&latch[0], 1, 0, "LATC");
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}
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void SA0036_Init(CartInfo *info) {
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WSync = SA72007Synco;
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GameStateRestore = SARestore;
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info->Power = SADPower;
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AddExState(&latch[0], 1, 0, "LATC");
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}
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void SA0037_Init(CartInfo *info) {
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WSync = SA0161MSynco;
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GameStateRestore = SARestore;
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info->Power = SADPower;
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AddExState(&latch[0], 1, 0, "LATC");
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}
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/* --------------------------------------------- */
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static DECLFR(TCA01Read) {
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uint8 ret;
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if ((A & 0x4100) == 0x4100)
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ret = (X.DB & 0xC0) | ((~A) & 0x3F);
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else
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ret = X.DB;
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return ret;
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}
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static void TCA01Power(void) {
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setprg16(0x8000, 0);
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setprg16(0xC000, 1);
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setchr8(0);
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetReadHandler(0x4100, 0x5FFF, TCA01Read);
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}
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void TCA01_Init(CartInfo *info) {
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info->Power = TCA01Power;
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}
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/* ------------------ Mapper 150 --------------------- */
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/* ------------------ Mapper 243 --------------------- */
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/* Mapper 150 - SA-015 / SA-630 / Unif UNL-Sachen-74LS374N */
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/* Mapper 243 - SA-020A */
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static void S74LS374NSynco(void) {
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uint32 chrBank;
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if (mapperNum == 150)
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chrBank = (latch[6] & 3) | ((latch[4] << 2) & 4) | (latch[2] << 3);
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else
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chrBank = (latch[2] & 1) | ((latch[4] << 1) & 2) | (latch[6] << 2);
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setprg32(0x8000, (latch[2] & 1) | latch[5]);
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setchr8(chrBank);
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switch ((latch[7] >> 1) & 3) {
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case 0: setmirrorw(0, 1, 1, 1); break;
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case 1: setmirror(MI_H); break;
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case 2: setmirror(MI_V); break;
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case 3: setmirror(MI_0); break;
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}
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}
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static DECLFR(S74LS374NRead) {
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uint8 ret;
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if ((A & 0xC101) == 0x4101) {
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if (dip & 1)
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ret = (latch[cmd] & 3) | (X.DB & 0xFC);
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else
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ret = (latch[cmd] & 7) | (X.DB & 0xF8);
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} else {
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ret = X.DB;
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}
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return ret;
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}
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static DECLFW(S74LS374NWrite) {
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if (dip & 1)
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V |= 4;
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switch (A & 0xC101) {
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case 0x4100:
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cmd = V & 7;
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break;
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case 0x4101:
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latch[cmd] = V & 7;
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S74LS374NSynco();
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break;
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}
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}
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static void S74LS374NRestore(int version) {
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S74LS374NSynco();
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}
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static void S74LS374NReset(void) {
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dip ^= 1;
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latch[0] = latch[1] = latch[2] = latch[3] = 0;
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latch[4] = latch[5] = latch[6] = latch[7] = 0;
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S74LS374NSynco();
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}
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static void S74LS374NPower(void) {
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dip = 0;
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latch[0] = latch[1] = latch[2] = latch[3] = 0;
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latch[4] = latch[5] = latch[6] = latch[7] = 0;
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S74LS374NSynco();
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0x4100, 0x7FFF, S74LS374NWrite);
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if (mapperNum == 150)
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SetReadHandler(0x4100, 0x7FFF, S74LS374NRead);
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}
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void S74LS374N_Init(CartInfo *info) {
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mapperNum = info->mapper;
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info->Power = S74LS374NPower;
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info->Reset = S74LS374NReset;
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GameStateRestore = S74LS374NRestore;
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AddExState(latch, 8, 0, "LATC");
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AddExState(&cmd, 1, 0, "CMD");
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}
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static DECLFR(Mapper553Read) {
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return 0x3A;
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}
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static void Mapper553Power(void) {
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setprg16(0xC000, 0);
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setchr8(0);
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SetReadHandler(0x8000, 0xBFFF, Mapper553Read);
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SetReadHandler(0xC000, 0xFFFF, CartBR);
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}
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void Mapper553_Init(CartInfo *info) {
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info->Power = Mapper553Power;
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}
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