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Mapper 449: Distinguish three circuit boards that differ in their menu selection mechanism via submapper.

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NewRisingSun
2025-09-09 10:57:02 +02:00
parent a95b1191b8
commit 2d55ac5532
1 changed files with 56 additions and 73 deletions
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129
src/boards/449.c
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@@ -1,7 +1,7 @@
/* FCEUmm - NES/Famicom Emulator
/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2022
* 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
@@ -19,88 +19,71 @@
*/
#include "mapinc.h"
#include "asic_latch.h"
static uint16 latchAddr;
static uint8 latchData;
static uint8 dipswitch;
static uint8 dipselect;
uint8 submapper;
uint8 pad;
uint8 padSelect;
static SFORMAT StateRegs[] =
{
{ &latchAddr, 2, "ADDR" },
{ &latchData, 1, "DATA" },
{ &latchData, 1, "DIPS" },
{ &dipselect, 1, "DSEL" },
{ 0 }
};
static void Mapper449_Sync(void)
{
int prg =latchAddr >>2 &0x1F | latchAddr >>3 &0x20;
if (~latchAddr &0x080)
{
setprg16(0x8000, prg);
setprg16(0xC000, prg |7);
}
else
{
if (latchAddr &0x001)
{
setprg32(0x8000, prg >>1);
}
else
{
setprg16(0x8000, prg);
setprg16(0xC000, prg);
}
}
setchr8(latchData);
setmirror(latchAddr &0x002? MI_H: MI_V);
static DECLFR(readPad_submapper0) {
return CartBR(A &~0xF | pad &0xF);
}
static DECLFR(Mapper449_Read)
{
if (dipselect)
return dipswitch &0x3;
else
if (latchAddr &0x200)
return CartBR(A | dipswitch &0xF);
else
return CartBR(A);
static DECLFR(readPad_submapper1) {
return pad;
}
static DECLFW(Mapper449_WriteDIPSelect)
{
dipselect =V &1;
static DECLFR(readPad_submapper2) {
return CartBR(A &~0x3 | pad &0x3);
}
static DECLFW(Mapper449_WriteLatch)
{
latchData =V;
latchAddr =A &0xFFFF;
Mapper449_Sync();
static void sync () {
int prg = Latch_address >>2 &0x1F | Latch_address >>3 &0x20 | Latch_address >>4 &0x40;
if (Latch_address &0x080) {
if (Latch_address &0x001)
setprg32(0x8000, prg >>1);
else {
setprg16(0x8000, prg);
setprg16(0xC000, prg);
}
setmirror(Latch_data &0x10? MI_1: MI_0);
} else {
setprg16(0x8000, prg);
setprg16(0xC000, prg | 7);
}
SetupCartCHRMapping(0, CHRptr[0], CHRsize[0], submapper == 0 && Latch_address &0x80? 0: 1);
setchr8(Latch_data);
setmirror(Latch_address &0x002? MI_H: MI_V);
SetReadHandler(0x8000, 0xFFFF, submapper == 0 && Latch_address &0x200? readPad_submapper0: submapper == 2 && padSelect &1? readPad_submapper2: CartBR);
}
static void Mapper449_Reset(void)
{
dipswitch++;
latchAddr =latchData =0;
Mapper449_Sync();
static DECLFW(writePad_submapper2) {
padSelect = V;
sync();
}
static void Mapper449_Power(void)
{
dipselect =dipswitch =latchAddr =latchData =0;
Mapper449_Sync();
SetWriteHandler(0x6000, 0x7FFF, Mapper449_WriteDIPSelect);
SetWriteHandler(0x8000, 0xFFFF, Mapper449_WriteLatch);
SetReadHandler(0x6000, 0x7FFF, CartBR);
SetReadHandler(0x8000, 0xFFFF, Mapper449_Read);
static void power () {
pad = padSelect = 0;
Latch_power();
if (submapper == 1)
SetReadHandler(0x5000, 0x5FFF, readPad_submapper1);
else
if (submapper == 2)
SetWriteHandler(0x6000, 0x7FFF, writePad_submapper2);
}
void Mapper449_Init(CartInfo *info)
{
info->Power = Mapper449_Power;
info->Reset = Mapper449_Reset;
AddExState(StateRegs, ~0, 0, 0);
}
static void reset () {
pad++;
padSelect = 0;
Latch_address = 0;
sync();
}
void Mapper449_Init (CartInfo *info) {
submapper = info->submapper;
Latch_init(info, sync, 0x8000, 0xFFFF, NULL);
info->Power = power;
info->Reset = reset;
AddExState(&pad, 1, 0, "DIPS");
if (submapper == 2) AddExState(&padSelect, 1, 0, "DIPE");
}