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UNL-EH8813A: Update based on latest wiki

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This commit is contained in:
retro-wertz
2019-06-27 00:56:24 +08:00
parent e734fa8796
commit fa21e91ef5
2 changed files with 18 additions and 13 deletions
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1
src/boards/ax40g.c
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@@ -1,6 +1,7 @@
/* 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

30
src/boards/eh8813a.c
View File

@@ -18,36 +18,40 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* Updated 6-27-19 */
#include "mapinc.h"
static uint16 addrlatch;
static uint8 datalatch, hw_mode;
static uint8 datalatch, addrlatch, lock, hw_mode;
static SFORMAT StateRegs[] =
{
{ &addrlatch, 2, "ADRL" },
{ &addrlatch, 1, "ADRL" },
{ &datalatch, 1, "DATL" },
{ &hw_mode, 1, "HWMO" },
{ &hw_mode, 1, "HWMO" },
{ &lock, 1, "LOCK" },
{ 0 }
};
static void Sync(void) {
uint8 prg = (addrlatch & 7);
uint8 prg = (addrlatch & 0x3F);
setchr8(datalatch);
if(addrlatch & 0x80) {
if (addrlatch & 0x80) {
setprg16(0x8000,prg);
setprg16(0xC000,prg);
} else {
setprg32(0x8000,prg >> 1);
}
setmirror(MI_V);
setmirror(((datalatch >> 7) & 1) ^ 1);
}
static DECLFW(EH8813AWrite) {
if((addrlatch & 0x100) == 0) {
addrlatch = A & 0x1FF;
datalatch = V & 0xF;
if (lock == 0) {
addrlatch = A & 0xFF;
datalatch = V & 0xFC;
lock = (A & 0x100) >> 8;
}
datalatch = (datalatch & ~0x03) | (V & 0x03);
Sync();
}
@@ -56,16 +60,16 @@ static DECLFR(EH8813ARead) {
A= (A & 0xFFF0) + hw_mode;
return CartBR(A);
}
static void EH8813APower(void) {
addrlatch = datalatch = hw_mode = 0;
addrlatch = datalatch = hw_mode = lock = 0;
Sync();
SetReadHandler(0x8000, 0xFFFF, EH8813ARead);
SetWriteHandler(0x8000, 0xFFFF, EH8813AWrite);
}
static void EH8813AReset(void) {
addrlatch = datalatch = 0;
addrlatch = datalatch = lock = 0;
hw_mode = (hw_mode + 1) & 0xF;
FCEU_printf("Hardware Switch is %01X\n", hw_mode);
Sync();