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Update mapper 319 (BMC-HP898F)

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- submapper support added
This commit is contained in:
negativeExponent
2020-01-23 07:57:28 +08:00
parent 583a44dfd8
commit 4fd5e3ac8e
1 changed files with 49 additions and 10 deletions
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59
src/boards/hp898f.c
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@@ -2,7 +2,7 @@
*
* Copyright notice for this file:
* Copyright (C) 2015 CaH4e3
*
* Copyright (C) 2020 dragon2snow,loong2snow from www.nesbbs.com
* 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
@@ -21,21 +21,43 @@
#include "mapinc.h"
static uint8 regs[2];
static uint8 _submapper = 0;
static SFORMAT StateRegs[] =
{
{ regs, 2, "REGS" },
{ &_submapper ,1, "SUBM"},
{ 0 }
};
// submapper 1 The code for the original fceux
// submapper 0 new HP898F code by dragon2snow,loong2snow from www.nesbbs.com
static void Sync(void) {
uint8 chr = (regs[0] >> 4) & 7;
uint8 prg = (regs[1] >> 3) & 7;
uint8 dec = (regs[1] >> 4) & 4;
setchr8(chr & (~(((regs[0] & 1) << 2) | (regs[0] & 2))));
setprg16(0x8000,prg & (~dec));
setprg16(0xC000,prg | dec);
setmirror(regs[1] >> 7);
if (_submapper == 1)
{
uint8 chr = (regs[0] >> 4) & 7;
uint8 prg = (regs[1] >> 3) & 7;
uint8 dec = (regs[1] >> 4) & 4;
setchr8(chr & (~(((regs[0] & 1) << 2) | (regs[0] & 2))));
setprg16(0x8000, prg & (~dec));
setprg16(0xC000, prg | dec);
setmirror(regs[1] >> 7);
}
else
{
if (regs[1] & 0x40)
setprg32(0x8000, regs[1] >> 1);
else {
setprg16(0x8000, regs[1]);
setprg16(0xC000, regs[1]);
}
setchr8((regs[0] >> 4) &~(((regs[0] & 1) ? 4 : 0) | (regs[0] & 2)));
if (regs[1] & 0x80)
setmirror(1);
else
setmirror(0);
}
}
static DECLFW(HP898FWrite) {
@@ -45,11 +67,27 @@ static DECLFW(HP898FWrite) {
}
}
static DECLFW(HP898FWriteEx) {
switch (A & 4) {
case 0: regs[0] = V; break;//CHR
case 4: regs[1] = (V & 0xC0) | ((V >> 2) & 6) | ((V & 0x20) ? 1 : 0); break;//PRG
}
Sync();
}
static void HP898FPower(void) {
regs[0] = regs[1] = 0;
Sync();
SetReadHandler(0x8000, 0xFFFF, CartBR);
SetWriteHandler(0x6000, 0xFFFF, HP898FWrite);
if (_submapper == 1)
{
SetReadHandler(0x8000, 0xFFFF, CartBR);
SetWriteHandler(0x6000, 0xFFFF, HP898FWrite);
}
else
{
SetReadHandler(0x8000, 0xFFFF, CartBR);
SetWriteHandler(0x6000, 0x7FFF, HP898FWriteEx);
SetWriteHandler(0xE000, 0xFFFF, HP898FWriteEx);
}
}
static void HP898FReset(void) {
@@ -62,6 +100,7 @@ static void StateRestore(int version) {
}
void BMCHP898F_Init(CartInfo *info) {
_submapper = info->submapper;
info->Reset = HP898FReset;
info->Power = HP898FPower;
GameStateRestore = StateRestore;