96 lines
1.6 KiB
C
96 lines
1.6 KiB
C
/*
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#include "mapinc.h"
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static uint8 cmdin;
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static uint8 cmd;
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static uint8 regs[8];
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static uint8 master,chrm;
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static void DoPRG217(void)
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{
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if(master&0x80)
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{
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setprg16(0x8000,master&0x1F);
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setprg16(0xc000,master&0x1F);
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}
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else
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{
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setprg8(0x8000,regs[1]);
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setprg8(0xA000,regs[3]);
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setprg8(0xC000,~1);
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setprg8(0xE000,~0);
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}
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}
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static void DoCHR217(void)
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{
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uint32 base=(cmd&0x80)<<5;
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int orie=(chrm&0x4)<<6;
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setchr2(0x0000^base,(orie|regs[0])>>1);
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setchr2(0x0800^base,(orie|regs[7])>>1);
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setchr1(0x1000,orie|regs[5]);
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setchr1(0x1400,orie|regs[2]);
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setchr1(0x1800,orie|regs[6]);
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setchr1(0x1c00,orie|regs[4]);
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}
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static DECLFW(Write217_write)
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{
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// if(A==0x5000)
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// {
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// master=V;
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// DoPRG217();
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// }
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// else if(A==0x5001)
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// {
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// chrm=V;
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// DoCHR217();
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// }
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// else if(A==0x5007)
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// {
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// }
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switch(A&0xE001)
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{
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case 0x4000:master=V;DoPRG217();break;
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case 0x8000:IRQCount=V;break;
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case 0xc001:break;
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case 0xe000:X6502_IRQEnd(FCEU_IQEXT);break;
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case 0xe001:break;
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case 0xa001:setmirror((V&1)^1);break;
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case 0x8001:cmd=V;cmdin=1;DoPRG217();DoCHR217();break;
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case 0xa000:if(!cmdin) break;
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regs[cmd&7]=V;
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DoPRG217();
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DoCHR217();
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cmdin=0;
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break;
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}
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}
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static void hooko217(void)
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{
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if(IRQCount)
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{
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IRQCount--;
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if(!IRQCount)
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{
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X6502_IRQBegin(FCEU_IQEXT);
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}
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}
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}
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void Mapper217_init(void)
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{
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int x;
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for(x=0;x<8;x++) regs[x]=0;
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master=chrm=cmd=cmdin=IRQCount=0;
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GameHBIRQHook=hooko217;
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SetReadHandler(0x8000,0xFFFF,CartBR);
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SetWriteHandler(0x5000,0xFFFF,Write217_write);
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DoPRG217();
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DoCHR217();
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}
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*/ |