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Mapper 527: Modified to use modular VRC2/4 emulation.

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This commit is contained in:
NewRisingSun
2025-04-10 14:30:43 +02:00
committed by LibretroAdmin
parent fff5fe225b
commit f6385585a6
2 changed files with 32 additions and 90 deletions
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32
src/boards/527.c Normal file
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/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2025 NewRisingSun
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "mapinc.h"
#include "vrc2and4.h"
static void sync () {
VRC24_syncPRG(0x01F, 0x000);
VRC24_syncCHR(0x1FF, 0x000);
setmirrorw(VRC24_chr[0] >>7, VRC24_chr[0] >>7, VRC24_chr[1] >>7, VRC24_chr[1] >>7);
}
void UNLAX40G_Init (CartInfo *info) {
VRC24_init(info, sync, 0x01, 0x02, 0, 0, 0);
}

90
src/boards/ax40g.c
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@@ -1,90 +0,0 @@
/* FCEUmm - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2019 Libretro Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* NES 2.0 Mapper 527 is used for a bootleg version of
* Taito's 不動明王伝 (Fudō Myōō Den).
* Its UNIF board name is UNL-AX-40G. The original INES Mapper 207 is
* replaced with a VRC2 clone (A0/A1, i.e. VRC2b) while retaining
* Mapper 207's extended mirroring.
*/
#include "mapinc.h"
static uint8 preg[2], creg[8], NT[2];
static SFORMAT StateRegs[] =
{
{ preg, 2, "PREG" },
{ creg, 8, "CREG" },
{ NT, 2, "NMT" },
{ 0 }
};
static void Sync(void) {
uint8 i;
setprg8(0x8000, preg[0]);
setprg8(0xA000, preg[1]);
setprg8(0xC000, 0x1E);
setprg8(0xE000, 0x1F);
for (i = 0; i < 8; i++)
setchr1(i << 10, creg[i]);
setmirrorw(NT[0], NT[0], NT[1], NT[1]);
}
static DECLFW(UNLAX40GWrite8) {
A &= 0xF003;
preg[0] = V & 0x1F;
Sync();
}
static DECLFW(UNLAX40GWriteA) {
A &= 0xF003;
preg[1] = V & 0x1F;
Sync();
}
static DECLFW(UNLAX40GWriteB) {
uint16 i, shift;
A &= 0xF003;
i = ((A >> 1) & 1) | ((A - 0xB000) >> 11);
shift = ((A & 1) << 2);
creg[i] = (creg[i] & (0xF0 >> shift)) | ((V & 0xF) << shift);
if (i < 2)
NT[i] = (creg[i] & 0x80) >> 7;
Sync();
}
static void UNLAX40GPower(void) {
Sync();
SetReadHandler(0x8000, 0xFFFF, CartBR);
SetWriteHandler(0x8000, 0x8FFF, UNLAX40GWrite8);
SetWriteHandler(0xA000, 0xAFFF, UNLAX40GWriteA);
SetWriteHandler(0xB000, 0xEFFF, UNLAX40GWriteB);
}
static void StateRestore(int version) {
Sync();
}
void UNLAX40G_Init(CartInfo *info) {
info->Power = UNLAX40GPower;
GameStateRestore = StateRestore;
AddExState(&StateRegs, ~0, 0, 0);
}