| 1 | /* |
| 2 | #include "mapinc.h" |
| 3 | |
| 4 | static uint8 cmdin; |
| 5 | static uint8 cmd; |
| 6 | static uint8 regs[8]; |
| 7 | static uint8 master,chrm; |
| 8 | |
| 9 | static void DoPRG217(void) |
| 10 | { |
| 11 | if(master&0x80) |
| 12 | { |
| 13 | setprg16(0x8000,master&0x1F); |
| 14 | setprg16(0xc000,master&0x1F); |
| 15 | } |
| 16 | else |
| 17 | { |
| 18 | setprg8(0x8000,regs[1]); |
| 19 | setprg8(0xA000,regs[3]); |
| 20 | setprg8(0xC000,~1); |
| 21 | setprg8(0xE000,~0); |
| 22 | } |
| 23 | } |
| 24 | |
| 25 | static void DoCHR217(void) |
| 26 | { |
| 27 | uint32 base=(cmd&0x80)<<5; |
| 28 | int orie=(chrm&0x4)<<6; |
| 29 | |
| 30 | setchr2(0x0000^base,(orie|regs[0])>>1); |
| 31 | setchr2(0x0800^base,(orie|regs[7])>>1); |
| 32 | |
| 33 | setchr1(0x1000,orie|regs[5]); |
| 34 | setchr1(0x1400,orie|regs[2]); |
| 35 | setchr1(0x1800,orie|regs[6]); |
| 36 | setchr1(0x1c00,orie|regs[4]); |
| 37 | } |
| 38 | |
| 39 | static DECLFW(Write217_write) |
| 40 | { |
| 41 | // if(A==0x5000) |
| 42 | // { |
| 43 | // master=V; |
| 44 | // DoPRG217(); |
| 45 | // } |
| 46 | // else if(A==0x5001) |
| 47 | // { |
| 48 | // chrm=V; |
| 49 | // DoCHR217(); |
| 50 | // } |
| 51 | // else if(A==0x5007) |
| 52 | // { |
| 53 | // } |
| 54 | |
| 55 | switch(A&0xE001) |
| 56 | { |
| 57 | case 0x4000:master=V;DoPRG217();break; |
| 58 | case 0x8000:IRQCount=V;break; |
| 59 | case 0xc001:break; |
| 60 | case 0xe000:X6502_IRQEnd(FCEU_IQEXT);break; |
| 61 | case 0xe001:break; |
| 62 | case 0xa001:setmirror((V&1)^1);break; |
| 63 | case 0x8001:cmd=V;cmdin=1;DoPRG217();DoCHR217();break; |
| 64 | case 0xa000:if(!cmdin) break; |
| 65 | regs[cmd&7]=V; |
| 66 | DoPRG217(); |
| 67 | DoCHR217(); |
| 68 | cmdin=0; |
| 69 | break; |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | static void hooko217(void) |
| 74 | { |
| 75 | if(IRQCount) |
| 76 | { |
| 77 | IRQCount--; |
| 78 | if(!IRQCount) |
| 79 | { |
| 80 | X6502_IRQBegin(FCEU_IQEXT); |
| 81 | } |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | void Mapper217_init(void) |
| 86 | { |
| 87 | int x; |
| 88 | for(x=0;x<8;x++) regs[x]=0; |
| 89 | master=chrm=cmd=cmdin=IRQCount=0; |
| 90 | GameHBIRQHook=hooko217; |
| 91 | SetReadHandler(0x8000,0xFFFF,CartBR); |
| 92 | SetWriteHandler(0x5000,0xFFFF,Write217_write); |
| 93 | DoPRG217(); |
| 94 | DoCHR217(); |
| 95 | } |
| 96 | */ |
| 97 | |