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parameterize vrc2and4 register mappings

This commit is contained in:
alexwjackson 2017-05-30 20:39:45 +00:00
parent fca1c78925
commit 268cf919e8
1 changed files with 45 additions and 84 deletions
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123
trunk/src/boards/vrc2and4.cpp
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@ -20,7 +20,8 @@
#include "mapinc.h" #include "mapinc.h"
static uint8 isPirate, is22; static bool isPirate, is22;
static uint8 reg1mask, reg2mask;
static uint16 IRQCount; static uint16 IRQCount;
static uint8 IRQLatch, IRQa; static uint8 IRQLatch, IRQa;
static uint8 prgreg[2], chrreg[8]; static uint8 prgreg[2], chrreg[8];
@ -61,15 +62,15 @@ static void Sync(void) {
setchr8(0); setchr8(0);
else{ else{
uint8 i; uint8 i;
if(!weirdo) //if(!weirdo)
for (i = 0; i < 8; i++) for (i = 0; i < 8; i++)
setchr1(i << 10, (chrhi[i] | chrreg[i]) >> is22); setchr1(i << 10, (chrhi[i] | chrreg[i]) >> is22);
else { //else {
setchr1(0x0000, 0xFC); // setchr1(0x0000, 0xFC);
setchr1(0x0400, 0xFD); // setchr1(0x0400, 0xFD);
setchr1(0x0800, 0xFF); // setchr1(0x0800, 0xFF);
weirdo--; // weirdo--;
} //}
} }
switch (mirr & 0x3) { switch (mirr & 0x3) {
case 0: setmirror(MI_V); break; case 0: setmirror(MI_V); break;
@ -80,7 +81,7 @@ static void Sync(void) {
} }
static DECLFW(VRC24Write) { static DECLFW(VRC24Write) {
A &= 0xF003; A = A & 0xF000 | !!(A & reg2mask) << 1 | !!(A & regmask1);
if ((A >= 0xB000) && (A <= 0xE003)) { if ((A >= 0xB000) && (A <= 0xE003)) {
if (UNIFchrrama) if (UNIFchrrama)
big_bank = (V & 8) << 2; // my personally many-in-one feature ;) just for support pirate cart 2-in-1 big_bank = (V & 8) << 2; // my personally many-in-one feature ;) just for support pirate cart 2-in-1
@ -126,64 +127,17 @@ static DECLFW(VRC24Write) {
} }
} }
static DECLFW(M21Write) { static void VRC24Power(void) {
A = (A & 0xF000) | ((A >> 1) & 0x3) | ((A >> 6) & 0x3);
VRC24Write(A, V);
}
static DECLFW(M22Write) {
//they say this is genuinely bugged in the game
//http://forums.nesdev.com/viewtopic.php?f=3&t=6584
//if (A == 0xC007) { // Ganbare Goemon Gaiden does strange things!!! at the end credits
// weirdo = 8; // quick dirty hack, seems there is no other games with such PCB, so
// // we never know if it will not work for something else lol
//}
A |= ((A >> 2) & 0x3); // It's just swapped lines from 21 mapper
//
VRC24Write((A & 0xF000) | ((A >> 1) & 1) | ((A << 1) & 2), V);
}
static DECLFW(M23Write) {
A |= ((A >> 2) & 0x3) | ((A >> 4) & 0x3);// actually there is many-in-one mapper source, some pirate or
// licensed games use various address bits for registers
VRC24Write(A, V);
}
static void M21Power(void) {
Sync();
SetReadHandler(0x8000, 0xFFFF, CartBR);
SetWriteHandler(0x8000, 0xFFFF, M21Write);
}
static void M22Power(void) {
Sync();
SetReadHandler(0x8000, 0xFFFF, CartBR);
SetWriteHandler(0x8000, 0xFFFF, M22Write);
}
static void M23Power(void) {
big_bank = 0x20;
Sync();
setprg8r(0x10, 0x6000, 0); // Only two Goemon games are have battery backed RAM, three more shooters
// (Parodius Da!, Gradius 2 and Crisis Force uses 2k or SRAM at 6000-67FF only
SetReadHandler(0x6000, 0x7FFF, CartBR);
SetWriteHandler(0x6000, 0x7FFF, CartBW);
SetReadHandler(0x8000, 0xFFFF, CartBR);
SetWriteHandler(0x8000, 0xFFFF, M23Write);
FCEU_CheatAddRAM(WRAMSIZE >> 10, 0x6000, WRAM);
}
static void M25Power(void) {
big_bank = 0x20; big_bank = 0x20;
Sync(); Sync();
if (WRAM) {
setprg8r(0x10, 0x6000, 0); setprg8r(0x10, 0x6000, 0);
SetReadHandler(0x6000, 0x7FFF, CartBR); SetReadHandler(0x6000, 0x7FFF, CartBR);
SetWriteHandler(0x6000, 0x7FFF, CartBW); SetWriteHandler(0x6000, 0x7FFF, CartBW);
SetReadHandler(0x8000, 0xFFFF, CartBR);
SetWriteHandler(0x8000, 0xFFFF, M22Write);
FCEU_CheatAddRAM(WRAMSIZE >> 10, 0x6000, WRAM); FCEU_CheatAddRAM(WRAMSIZE >> 10, 0x6000, WRAM);
}
SetReadHandler(0x8000, 0xFFFF, CartBR);
SetWriteHandler(0x8000, 0xFFFF, VRC24Write);
} }
void VRC24IRQHook(int a) { void VRC24IRQHook(int a) {
@ -214,25 +168,29 @@ static void VRC24Close(void) {
} }
void Mapper21_Init(CartInfo *info) { void Mapper21_Init(CartInfo *info) {
isPirate = 0; isPirate = false;
is22 = 0; is22 = false;
info->Power = M21Power; reg1mask = 0x42;
MapIRQHook = VRC24IRQHook; reg2mask = 0x84;
GameStateRestore = StateRestore; VRC24_Init(info);
AddExState(&StateRegs, ~0, 0, 0);
} }
void Mapper22_Init(CartInfo *info) { void Mapper22_Init(CartInfo *info) {
isPirate = 0; isPirate = false;
is22 = 1; is22 = true;
info->Power = M22Power; reg1mask = 2;
reg2mask = 1;
// no IRQ (all mapper 22 games are VRC2)
// no WRAM
info->Power = VRC24Power;
GameStateRestore = StateRestore; GameStateRestore = StateRestore;
AddExState(&StateRegs, ~0, 0, 0); AddExState(&StateRegs, ~0, 0, 0);
} }
void VRC24_Init(CartInfo *info) { static void VRC24_Init(CartInfo *info) {
info->Power = VRC24Power;
info->Close = VRC24Close; info->Close = VRC24Close;
MapIRQHook = VRC24IRQHook; MapIRQHook = VRC24IRQHook;
GameStateRestore = StateRestore; GameStateRestore = StateRestore;
@ -251,22 +209,25 @@ void VRC24_Init(CartInfo *info) {
} }
void Mapper23_Init(CartInfo *info) { void Mapper23_Init(CartInfo *info) {
isPirate = 0; isPirate = false;
is22 = 0; is22 = false;
info->Power = M23Power; reg2mask = 0x15;
reg2mask = 0x2a;
VRC24_Init(info); VRC24_Init(info);
} }
void Mapper25_Init(CartInfo *info) { void Mapper25_Init(CartInfo *info) {
isPirate = 0; isPirate = false;
is22 = 0; is22 = false;
info->Power = M25Power; reg1mask = 0xa;
reg2mask = 0x5;
VRC24_Init(info); VRC24_Init(info);
} }
void UNLT230_Init(CartInfo *info) { void UNLT230_Init(CartInfo *info) {
isPirate = 1; isPirate = true;
is22 = 0; is22 = false;
info->Power = M23Power; reg1mask = 0x15;
reg2mask = 0x2a;
VRC24_Init(info); VRC24_Init(info);
} }