admin/ci-libretro-fceumm
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Add solder-pad-based menu selection to mapper 285. Make Latch_clear public and use it to reset multicarts to menu instead of Latch_power.

Browse Source
This commit is contained in:
NewRisingSun
2025-09-09 13:44:14 +02:00
parent ee20cce026
commit b2de421d4d
20 changed files with 155 additions and 63 deletions
Download Patch File Download Diff File Expand all files Collapse all files

78
src/boards/285.c Normal file
View File

@@ -0,0 +1,78 @@
/* 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 "asic_latch.h"
static uint8 pad;
static void sync_submapper0 () {
if (Latch_data &0x40)
setprg32(0x8000, Latch_data >>1);
else {
setprg16(0x8000, Latch_data);
setprg16(0xC000, Latch_data |7);
}
setchr8(0);
if (Latch_data &0x80)
setmirror(Latch_data &0x20? MI_1: MI_0);
else
setmirror(Latch_data &0x20? MI_H: MI_V);
}
static void sync_submapper1 () {
if (Latch_data &0x40)
setprg32(0x8000, Latch_data >>1 &0x03 | Latch_data >>2 &~0x03);
else {
setprg16(0x8000, Latch_data >>1 &~0x07 | Latch_data &0x07);
setprg16(0xC000, Latch_data >>1 | 0x07);
}
setchr8(0);
if (Latch_data &0x80)
setmirror(Latch_data &0x20? MI_1: MI_0);
else
setmirror(Latch_data &0x08? MI_H: MI_V);
}
static DECLFR (readPad) {
if (A &0x80) return pad >= 20? (4 | pad % 20): 0; else
if (A &0x40) return pad >= 16? (4 | pad % 16): 0; else
if (A &0x20) return pad >= 12? (4 | pad % 12): 0; else
if (A &0x10) return pad >= 8? (4 | pad % 8): 0; else
return pad >= 8? 0: pad &7;
}
static void power() {
pad = 0;
Latch_power();
SetReadHandler(0x5000, 0x5FFF, readPad);
}
static void reset() {
pad = ++pad %24;
Latch_clear();
}
void Mapper285_Init (CartInfo *info) {
Latch_init(info, info->submapper ==1? sync_submapper1: sync_submapper0, 0x8000, 0xFFFF, NULL);
info->Power = power;
info->Reset = reset;
AddExState(&pad, 1, 0, "DIPS");
}