75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
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#define latch regByte[0]
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static void ANROM_sync () {
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int AND =prgAND >>2;
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int OR =prgOR >>2;
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setprg32(0x8000, latch &AND | OR &~AND);
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setchr8(0);
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setmirror(latch &0x10? MI_1: MI_0);
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}
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static void BNROM_sync () {
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int AND =prgAND >>2;
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int OR =prgOR >>2;
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setprg32(0x8000, latch &AND | OR &~AND);
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setchr8(0);
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setmirror(mapperFlags &4? MI_H: MI_V);
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}
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static void GNROM_sync () {
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int AND =prgAND >>2;
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int OR =prgOR >>2 | (mapperFlags &4? 2: 0);
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setprg32(0x8000, latch >>4 &AND | OR &~AND);
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setchr8(latch &0x0F);
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setmirror(mapper &1? MI_H: MI_V);
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}
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static void UNROM_sync () {
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int AND =prgAND >>1;
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int OR =prgOR >>1;
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setprg16(0x8000, latch &AND | OR &~AND);
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setprg16(0xC000, 0xFF &AND | OR &~AND);
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setchr8(0);
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setmirror(mapperFlags &4? MI_H: MI_V);
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}
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static DECLFW(DISCRETE_writeLatch) {
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if (mapper ==0x09 && mapperFlags ==0xE && A ==0xA000 && V ==0x00)
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V =0x06; // UNROM: Strange hack, needed to get #282 "Portopia Serial Murder Case" on 852-in-1 running
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latch =V;
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sync();
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}
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static DECLFW(GNROM_writeLatch) {
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if (~prgOR &0x2000 || mapper ==0x1C || mapper==0x1D)
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V =V >>4 &0xF | V <<4 &0xF0; // Color Dreams: swap nibbles to mimic GNROM
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latch =V;
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sync();
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}
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void ANROM_BNROM_reset(uint8 clearRegs) {
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sync =mapperFlags &8? BNROM_sync: ANROM_sync;
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prgAND =(mapper ==0x06 || mapper ==0x16)? 0x3F: mapperFlags &2? 0x0F: 0x1F;
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SetWriteHandler(0x8000, 0xFFFF, DISCRETE_writeLatch);
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latch =0;
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sync();
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}
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void GNROM_reset(uint8 clearRegs) {
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sync =GNROM_sync;
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prgAND =mapperFlags &8? 0x07: 0x0F;
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SetWriteHandler(0x8000, 0xFFFF, GNROM_writeLatch);
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latch =0;
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sync();
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}
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void UNROM_reset(uint8 clearRegs) {
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sync =UNROM_sync;
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prgAND =mapper ==0x0B || mapper ==0x17 &&~mapperFlags &8? 0x3F: mapperFlags &2? 0x0F: 0x1F;
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SetWriteHandler(0x8000, 0xFFFF, DISCRETE_writeLatch);
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sync();
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}
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#undef latch
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