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Rewrote the VRC2/4 emulation for modularity, and separate individual mappers into separate source files.

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NewRisingSun
2025-04-07 21:33:51 +02:00
committed by LibretroAdmin
parent b349f7f3e2
commit 6cbb11bdd1
8 changed files with 907 additions and 343 deletions
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69
src/boards/21_22_23_25.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);
VRC24_syncMirror();
}
void Mapper21_Init (CartInfo *info) {
switch(info->submapper) {
case 1: VRC24_init(info, sync, 0x02, 0x04, 1, 1, 8); break;
case 2: VRC24_init(info, sync, 0x40, 0x80, 1, 1, 8); break;
default: VRC24_init(info, sync, 0x42, 0x84, 1, 1, 8); break;
}
}
int Mapper22_getCHRBank(int bank) {
return VRC24_chr[bank &7] >>1;
}
void Mapper22_Init (CartInfo *info) {
VRC24_init(info, sync, 0x02, 0x01, 0, 0, 8);
VRC24_GetCHRBank =Mapper22_getCHRBank;
}
DECLFR(Mapper23_readProtection) {
return VRC2_pins;
}
void Mapper23_Init (CartInfo *info) {
switch(info->submapper) {
case 1: VRC24_init(info, sync, 0x01, 0x02, 1, 1, 8); break;
case 2: VRC24_init(info, sync, 0x04, 0x08, 1, 1, 8); break;
case 3: VRC24_init(info, sync, 0x01, 0x02, 0, 0, 8);
VRC24_WRAMRead =Mapper23_readProtection;
break;
default: VRC24_init(info, sync, 0x05, 0x0A, 1, 1, 8); break;
}
}
void Mapper25_Init (CartInfo *info) {
switch(info->submapper) {
case 1: VRC24_init(info, sync, 0x02, 0x01, 1, 1, 8); break;
case 2: VRC24_init(info, sync, 0x08, 0x04, 1, 1, 8); break;
case 3: VRC24_init(info, sync, 0x02, 0x01, 0, 0, 8); break;
default: VRC24_init(info, sync, 0x0A, 0x05, 1, 1, 8); break;
}
}