Add mapper 528
This commit is contained in:
libretroadmin
127
src/boards/528.c
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127
src/boards/528.c
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@@ -0,0 +1,127 @@
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/* FCEUmm - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2023
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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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/* NES 2.0 Mapper 528
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* UNIF BMC-831128C
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*/
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#include "mapinc.h"
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#include "vrcirq.h"
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static uint8 preg[4], creg[8], mirr;
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static uint8 gamesel;
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static uint8 *WRAM;
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static uint32 WRAMSIZE;
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static SFORMAT StateRegs[] =
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{
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{ preg, 4, "PREG" },
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{ creg, 8, "CREG" },
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{ &mirr, 1, "MIRR" },
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{ &gamesel, 1, "GSEL" },
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{ 0 }
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};
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static void Sync(void) {
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uint8 mask = (gamesel << 4) | 0x0F;
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if (preg[3] == 1) {
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setprg8r(0x10, 0x6000, 0);
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} else {
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setprg8(0x6000, (preg[3] & mask) + gamesel);
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}
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setprg8(0x8000, (preg[0] & mask) + (gamesel << 4));
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setprg8(0xA000, (preg[1] & mask) + (gamesel << 4));
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setprg8(0xC000, ( ~1 & mask) + (gamesel << 4));
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setprg8(0xE000, ( ~0 & mask) + (gamesel << 4));
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setchr1(0x0000, creg[0] + (gamesel << 8));
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setchr1(0x0400, creg[1] + (gamesel << 8));
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setchr1(0x0800, creg[2] + (gamesel << 8));
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setchr1(0x0C00, creg[3] + (gamesel << 8));
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setchr1(0x1000, creg[4] + (gamesel << 8));
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setchr1(0x1400, creg[5] + (gamesel << 8));
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setchr1(0x1800, creg[6] + (gamesel << 8));
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setchr1(0x1C00, creg[7] + (gamesel << 8));
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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: 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(M528Write1) {
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switch (A & 0x0F) {
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case 0x0: creg[0] = V; break;
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case 0x1: creg[1] = V; break;
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case 0x2: creg[2] = V; break;
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case 0x3: creg[3] = V; break;
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case 0x4: creg[4] = V; break;
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case 0x5: creg[5] = V; break;
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case 0x6: creg[6] = V; break;
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case 0x7: creg[7] = V; break;
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case 0x8: preg[3] = V; break;
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case 0x9: preg[0] = V; break;
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case 0xA: preg[1] = V; break;
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case 0xB: break;
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case 0xC: mirr = V & 3; break;
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case 0xD: VRCIRQ_Control(V); break;
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case 0xE: VRCIRQ_Acknowledge(); break;
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case 0xF: VRCIRQ_Latch(V); break;
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}
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gamesel = (A & 0x4000) >> 14;
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Sync();
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}
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static void M528Power(void) {
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int i;
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gamesel = 0;
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preg[0] = 0;
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preg[1] = 1;
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preg[2] = 0;
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preg[3] = 0;
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for (i = 0; i < 8; i++) {
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creg[i] = i;
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}
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Sync();
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0xA000, 0xAFFF, M528Write1);
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SetWriteHandler(0xC000, 0xCFFF, M528Write1);
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SetReadHandler(0x6000, 0x7FFF, CartBR);
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SetWriteHandler(0x6000, 0x7FFF, CartBW);
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FCEU_CheatAddRAM(WRAMSIZE >> 10, 0x6000, WRAM);
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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 Mapper528_Init(CartInfo *info) {
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info->Power = M528Power;
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GameStateRestore = StateRestore;
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VRCIRQ_Init();
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AddExState(&StateRegs, ~0, 0, 0);
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WRAMSIZE = 8192;
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WRAM = (uint8*) FCEU_gmalloc(WRAMSIZE);
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SetupCartPRGMapping(0x10, WRAM, WRAMSIZE, 1);
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AddExState(WRAM, WRAMSIZE, 0, "WRAM");
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}
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93
src/boards/vrcirq.c
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93
src/boards/vrcirq.c
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@@ -0,0 +1,93 @@
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#include "mapinc.h"
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#include "vrcirq.h"
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static int16 IRQPrescaler;
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static uint8 IRQCount;
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static uint8 IRQLatch;
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static uint8 IRQd;
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static uint8 IRQa;
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static uint8 IRQm;
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static SFORMAT StateRegs[] =
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{
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{ &IRQPrescaler, 2, "PREC" },
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{ &IRQCount, 1, "IRQC" },
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{ &IRQLatch, 1, "IRQL" },
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{ &IRQd, 1, "IRQD" },
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{ &IRQa, 1, "IRQA" },
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{ &IRQm, 1, "IRQM" },
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{ 0 }
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};
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static void FP_FASTAPASS(1) VRCIRQ_IrqHook(int a)
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{
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int count = a;
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if (!IRQa) {
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return;
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}
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while (count) {
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count--;
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IRQPrescaler -= 3;
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if (IRQm || (IRQPrescaler < 0 && !IRQm)) {
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IRQPrescaler += 341;
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if (IRQCount == 0xFF) {
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X6502_IRQBegin(FCEU_IQEXT);
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IRQCount = IRQLatch;
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} else {
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IRQCount++;
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}
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}
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}
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}
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void VRCIRQ_Init(void)
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{
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IRQPrescaler = 0;
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IRQCount = 0;
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IRQLatch = 0;
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IRQd = 0;
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IRQa = 0;
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IRQm = 0;
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MapIRQHook = VRCIRQ_IrqHook;
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AddExState(&StateRegs, ~0, 0, 0);
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}
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void VRCIRQ_Latch(uint8 V)
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{
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IRQLatch = V;
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}
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void VRCIRQ_LatchNibble(uint8 V, uint8 highBit)
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{
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if (highBit) {
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IRQLatch &= 0x0F;
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IRQLatch |= V << 4;
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} else {
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IRQLatch &= 0xF0;
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IRQLatch |= V & 0xF;
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}
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}
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void VRCIRQ_Control(uint8 V)
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{
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IRQd = (V & 0x01) == 0x01;
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IRQa = (V & 0x02) == 0x02;
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IRQm = (V & 0x04) == 0x04;
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IRQPrescaler = 341;
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if (IRQa) {
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IRQCount = IRQLatch;
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}
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X6502_IRQEnd(FCEU_IQEXT);
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}
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void VRCIRQ_Acknowledge(void)
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{
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IRQa = IRQd;
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X6502_IRQEnd(FCEU_IQEXT);
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}
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10
src/boards/vrcirq.h
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10
src/boards/vrcirq.h
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@@ -0,0 +1,10 @@
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#ifndef _VRCIRQ_H
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#define _VRCIRQ_H
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void VRCIRQ_Init(void);
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void VRCIRQ_Latch(uint8 V);
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void VRCIRQ_LatchNibble(uint8 V, uint8 highBit);
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void VRCIRQ_Control(uint8 V);
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void VRCIRQ_Acknowledge(void);
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#endif /* _VRCIRQ_H */
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@@ -848,6 +848,7 @@ INES_BOARD_BEGIN()
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INES_BOARD( "KS7021A", 525, UNLKS7021A_Init )
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INES_BOARD( "BJ-56", 526, UNLBJ56_Init )
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INES_BOARD( "AX-40G", 527, UNLAX40G_Init )
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INES_BOARD( "831128C", 528, Mapper528_Init )
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INES_BOARD( "T-230", 529, UNLT230_Init )
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INES_BOARD( "AX5705", 530, UNLAX5705_Init )
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INES_BOARD( "Sachen 3014", 533, Mapper533_Init )
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@@ -348,6 +348,7 @@ void Mapper501_Init(CartInfo *);
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void Mapper502_Init(CartInfo *);
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void Mapper516_Init(CartInfo *);
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void Mapper523_Init(CartInfo *);
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void Mapper528_Init(CartInfo *);
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void Mapper533_Init(CartInfo *);
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void Mapper534_Init(CartInfo *);
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void Mapper538_Init(CartInfo *);
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@@ -446,6 +446,7 @@ static BMAPPING bmap[] = {
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{ "AX5705", 530, UNLAX5705_Init, 0 },
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{ "BB", 108, UNLBB_Init, 0 },
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{ "BS-110", 444, Mapper444_Init, 0 }, /* Due to a mix-up, UNIF MAPR BMC-BS-110 is actually the NC7000M PCB and refers to NES 2.0 Mapper 444 instead. */
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{ "831128C", 528, Mapper528_Init, 0 },
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{ "BS-5", 286, BMCBS5_Init, 0 },
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{ "CC-21", 27, UNLCC21_Init, 0 },
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{ "CITYFIGHT", 266, UNLCITYFIGHT_Init, 0 },
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