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Mapper 319: Use hp898f.c only for the old incorrect UNIF bank order, and 319.c for all NES 2.0 ROMs. Add CNROM mode and solder pad switch to the latter.

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NewRisingSun
2021-11-14 17:01:55 +01:00
parent e12a40c2f4
commit ea17977c20
5 changed files with 102 additions and 44 deletions
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56
src/boards/hp898f.c
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@@ -20,45 +20,25 @@
#include "mapinc.h"
/* This source code file only applies to Sanchez' original UNIF file with the incorrect bank order.
The correctly-specified mapper, used for all NES 2.0 ROM files, is implemented in 319.c. */
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) {
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 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);
}
static DECLFW(HP898FWrite) {
@@ -78,17 +58,8 @@ static DECLFW(HP898FWriteEx) {
static void HP898FPower(void) {
regs[0] = regs[1] = 0;
Sync();
if (_submapper == 1)
{
SetReadHandler(0x8000, 0xFFFF, CartBR);
SetWriteHandler(0x6000, 0xFFFF, HP898FWrite);
}
else
{
SetReadHandler(0x8000, 0xFFFF, CartBR);
SetWriteHandler(0x6000, 0x7FFF, HP898FWriteEx);
SetWriteHandler(0xE000, 0xFFFF, HP898FWriteEx);
}
SetReadHandler(0x8000, 0xFFFF, CartBR);
SetWriteHandler(0x6000, 0xFFFF, HP898FWrite);
}
static void HP898FReset(void) {
@@ -101,7 +72,6 @@ static void StateRestore(int version) {
}
void BMCHP898F_Init(CartInfo *info) {
_submapper = info->submapper;
info->Reset = HP898FReset;
info->Power = HP898FPower;
GameStateRestore = StateRestore;