Rewrite mapper 266 to use modular VRC2/4 emulation.
This commit is contained in:
NewRisingSun
committed by
LibretroAdmin
LibretroAdmin
parent
af60e17d0b
commit
465dfbe56e
61
src/boards/266.c
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61
src/boards/266.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) 2025 NewRisingSun
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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 "vrc2and4.h"
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static uint8 prg;
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static SFORMAT UNLCITYFIGHT_stateRegs[] ={
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{ &prg, 1, "PRG8" },
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{ 0 }
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};
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static void sync () {
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setprg32(0x8000, prg);
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VRC24_syncCHR(0x1FF, 0x000);
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VRC24_syncMirror();
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}
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DECLFW(UNLCITYFIGHT_externalSelect) {
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if (A &0x800)
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(GetWriteHandler(0x4011))(0x4011, V <<3 &0x78);
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else {
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prg =V >>2;
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VRC24_Sync();
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}
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}
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DECLFW(UNLCITYFIGHT_unscrambleAddress) {
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VRC24_writeReg(A &~0x6000 | A <<1 &0x4000 | A >>1 &0x2000, V);
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}
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void UNLCITYFIGHT_power(void) {
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prg =0;
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VRC24_power();
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SetWriteHandler(0x8000, 0xFFFF, UNLCITYFIGHT_unscrambleAddress);
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}
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void UNLCITYFIGHT_Init (CartInfo *info) {
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VRC24_init(info, sync, 0x04, 0x08, 1, 1, 0);
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VRC24_ExternalSelect =UNLCITYFIGHT_externalSelect;
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AddExState(UNLCITYFIGHT_stateRegs, ~0, 0, 0);
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info->Power =UNLCITYFIGHT_power;
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}
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@@ -1,124 +0,0 @@
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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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* City Fighter IV sith Sound VRC4 hacked
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*/
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#include "mapinc.h"
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static int32 IRQCount;
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static uint8 IRQa;
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static uint8 prg_reg, prg_mode, mirr;
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static uint8 chr_reg[8];
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static writefunc pcmwrite;
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static SFORMAT StateRegs[] =
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{
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{ &IRQCount, 4, "IRQC" },
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{ &IRQa, 1, "IRQA" },
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{ &prg_reg, 1, "PREG" },
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{ &prg_mode, 1, "PMOD" },
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{ &mirr, 1, "MIRR" },
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{ chr_reg, 8, "CREG" },
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{ 0 }
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};
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static void Sync(void) {
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int i;
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setprg32(0x8000, prg_reg >> 2);
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if (!prg_mode)
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setprg8(0xC000, prg_reg);
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for (i = 0; i < 8; i++)
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setchr1(i << 10, chr_reg[i]);
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switch (mirr) {
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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: setmirror(MI_0); break;
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case 3: setmirror(MI_1); break;
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}
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}
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static DECLFW(UNLCITYFIGHTWrite) {
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/* FCEU_printf("%04x %02x",A,V); */
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switch (A & 0xF00C) {
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case 0x9000: prg_reg = V & 0xC; mirr = V & 3; break;
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case 0x9004:
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case 0x9008:
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case 0x900C:
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if (A & 0x800)
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pcmwrite(0x4011, (V & 0xf) << 3);
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else
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prg_reg = V & 0xC;
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break;
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case 0xC000:
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case 0xC004:
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case 0xC008:
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case 0xC00C: prg_mode = V & 1; break;
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case 0xD000: chr_reg[0] = (chr_reg[0] & 0xF0) | (V & 0x0F); break;
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case 0xD004: chr_reg[0] = (chr_reg[0] & 0x0F) | (V << 4); break;
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case 0xD008: chr_reg[1] = (chr_reg[1] & 0xF0) | (V & 0x0F); break;
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case 0xD00C: chr_reg[1] = (chr_reg[1] & 0x0F) | (V << 4); break;
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case 0xA000: chr_reg[2] = (chr_reg[2] & 0xF0) | (V & 0x0F); break;
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case 0xA004: chr_reg[2] = (chr_reg[2] & 0x0F) | (V << 4); break;
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case 0xA008: chr_reg[3] = (chr_reg[3] & 0xF0) | (V & 0x0F); break;
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case 0xA00C: chr_reg[3] = (chr_reg[3] & 0x0F) | (V << 4); break;
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case 0xB000: chr_reg[4] = (chr_reg[4] & 0xF0) | (V & 0x0F); break;
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case 0xB004: chr_reg[4] = (chr_reg[4] & 0x0F) | (V << 4); break;
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case 0xB008: chr_reg[5] = (chr_reg[5] & 0xF0) | (V & 0x0F); break;
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case 0xB00C: chr_reg[5] = (chr_reg[5] & 0x0F) | (V << 4); break;
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case 0xE000: chr_reg[6] = (chr_reg[6] & 0xF0) | (V & 0x0F); break;
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case 0xE004: chr_reg[6] = (chr_reg[6] & 0x0F) | (V << 4); break;
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case 0xE008: chr_reg[7] = (chr_reg[7] & 0xF0) | (V & 0x0F); break;
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case 0xE00C: chr_reg[7] = (chr_reg[7] & 0x0F) | (V << 4); break;
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case 0xF000: IRQCount = ((IRQCount & 0x1E0) | ((V & 0xF) << 1)); break;
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case 0xF004: IRQCount = ((IRQCount & 0x1E) | ((V & 0xF) << 5)); break;
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case 0xF008: IRQa = V & 2; X6502_IRQEnd(FCEU_IQEXT); break;
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default:
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break;
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}
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Sync();
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}
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static void UNLCITYFIGHTIRQ(int a) {
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if (IRQa) {
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IRQCount -= a;
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if (IRQCount <= 0) {
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X6502_IRQBegin(FCEU_IQEXT);
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}
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}
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}
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static void UNLCITYFIGHTPower(void) {
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prg_reg = 0;
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Sync();
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pcmwrite = GetWriteHandler(0x4011);
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0x8000, 0xFFFF, UNLCITYFIGHTWrite);
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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 UNLCITYFIGHT_Init(CartInfo *info) {
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info->Power = UNLCITYFIGHTPower;
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MapIRQHook = UNLCITYFIGHTIRQ;
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GameStateRestore = StateRestore;
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AddExState(&StateRegs, ~0, 0, 0);
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}
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