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Add mappers 589 and 591.

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NewRisingSun
2025-09-08 23:32:43 +02:00
parent 2c0c3c1876
commit 4d48988cf4
6 changed files with 88 additions and 12 deletions
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43
src/boards/589.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 "asic_latch.h"
static void sync () {
if (Latch_address &0x20) { /* First chip: 256 KiB */
setprg16(0x8000, Latch_address >>1 &0x08 | Latch_data &0x07);
setprg16(0xC000, Latch_address >>1 &0x08 | 0x07);
} else { /* Second chip: 128 KiB (boot) */
setprg16(0x8000, 0x10 | Latch_address >>1 &0x07);
setprg16(0xC000, 0x10 | Latch_address >>1 &0x07);
}
setchr8(0);
setmirror(Latch_address &1? MI_H: MI_V);
}
static void trapLatchWrite (uint16 *newAddress, uint8 *newValue, uint8 romValue) { /* The address bits are only updated on a falling edge of D3. */
if (!(Latch_data &0x08 && ~*newValue &0x08)) *newAddress = Latch_address;
}
void Mapper589_Init (CartInfo *info) {
Latch_init(info, sync, 0x8000, 0xFFFF, trapLatchWrite);
info->Reset = Latch_power;
}