mirror of
https://github.com/dborth/fceugx.git
synced 2024-11-01 15:05:05 +01:00
86 lines
2.2 KiB
C++
86 lines
2.2 KiB
C++
|
/* FCE Ultra - NES/Famicom Emulator
|
||
|
|
*
|
||
|
|
* Copyright notice for this file:
|
||
|
|
* Copyright (C) 2016 CaH4e3
|
||
|
|
*
|
||
|
|
* 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
|
||
|
|
*
|
||
|
|
* FDS Conversion (Exciting Basket), weird banking addressing, seems because
|
||
|
|
* of used addressing scheme, made to disable the lower system banks from 6000
|
||
|
|
* but the kaiser mapper chip and PCB are the same as usual
|
||
|
|
* probably need a hard eprom dump to verify actual banks layout
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "mapinc.h"
|
||
|
|
|
||
|
|
static uint8 preg;
|
||
|
|
|
||
|
|
static SFORMAT StateRegs[] =
|
||
|
|
{
|
||
|
|
{ &preg, 1, "PREG" },
|
||
|
|
{ 0 }
|
||
|
|
};
|
||
|
|
|
||
|
|
static void Sync(void) {
|
||
|
|
setprg8(0x6000, preg);
|
||
|
|
setprg8(0x8000, 0xC);
|
||
|
|
setprg8(0xA000, 0xD);
|
||
|
|
setprg8(0xC000, 0xE);
|
||
|
|
setprg8(0xE000, 0xF);
|
||
|
|
setchr8(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static DECLFW(UNLKS7016Write) {
|
||
|
|
u16 mask = (A & 0x30);
|
||
|
|
switch(A & 0xD943) {
|
||
|
|
case 0xD943: {
|
||
|
|
if(mask == 0x30) {
|
||
|
|
preg = 8 | 3; // or A, or no bus (all FF)
|
||
|
|
} else {
|
||
|
|
preg = (A >> 2) & 0xF; // can be anything but C-F
|
||
|
|
}
|
||
|
|
Sync();
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case 0xD903: { // this case isn't usedby the game, but addressing does this as a side effect
|
||
|
|
if(mask == 0x30) {
|
||
|
|
preg = 8 | ((A >> 2) & 3); // also masked C-F from output
|
||
|
|
} else {
|
||
|
|
preg = 8 | 3;
|
||
|
|
}
|
||
|
|
Sync();
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void UNLKS7016Power(void) {
|
||
|
|
preg = 8;
|
||
|
|
Sync();
|
||
|
|
SetReadHandler(0x6000, 0xffff, CartBR);
|
||
|
|
SetWriteHandler(0x8000, 0xffff, UNLKS7016Write);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void StateRestore(int version) {
|
||
|
|
Sync();
|
||
|
|
}
|
||
|
|
|
||
|
|
void UNLKS7016_Init(CartInfo *info) {
|
||
|
|
info->Power = UNLKS7016Power;
|
||
|
|
GameStateRestore = StateRestore;
|
||
|
|
AddExState(&StateRegs, ~0, 0, 0);
|
||
|
|
}
|