| 1 | #include "mapinc.h" |
| 2 | |
| 3 | static uint8 mode; |
| 4 | static uint8 DRegs[4]; |
| 5 | |
| 6 | static SFORMAT StateRegs[]= |
| 7 | { |
| 8 | {DRegs, 4, "DREG"}, |
| 9 | {0} |
| 10 | }; |
| 11 | |
| 12 | static void Sync(void) |
| 13 | { |
| 14 | int base, bank; |
| 15 | base = ((DRegs[0]^DRegs[1])&0x10)<<1; |
| 16 | bank = (DRegs[2]^DRegs[3])&0x1f; |
| 17 | |
| 18 | if(DRegs[1]&0x08) |
| 19 | { |
| 20 | bank &= 0xfe; |
| 21 | if(mode==0) |
| 22 | { |
| 23 | setprg16(0x8000,base+bank+1); |
| 24 | setprg16(0xC000,base+bank+0); |
| 25 | } |
| 26 | else |
| 27 | { |
| 28 | setprg16(0x8000,base+bank+0); |
| 29 | setprg16(0xC000,base+bank+1); |
| 30 | } |
| 31 | } |
| 32 | else |
| 33 | { |
| 34 | if(DRegs[1]&0x04) |
| 35 | { |
| 36 | setprg16(0x8000,0x1f); |
| 37 | setprg16(0xC000,base+bank); |
| 38 | } |
| 39 | else |
| 40 | { |
| 41 | setprg16(0x8000,base+bank); |
| 42 | if(mode==0) |
| 43 | setprg16(0xC000,0x20); |
| 44 | else |
| 45 | setprg16(0xC000,0x07); |
| 46 | } |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | static DECLFW(Mapper167_write) |
| 51 | { |
| 52 | DRegs[(A>>13)&0x03]=V; |
| 53 | Sync(); |
| 54 | } |
| 55 | |
| 56 | static void StateRestore(int version) |
| 57 | { |
| 58 | Sync(); |
| 59 | } |
| 60 | |
| 61 | void Mapper166_init(void) |
| 62 | { |
| 63 | mode=1; |
| 64 | DRegs[0]=DRegs[1]=DRegs[2]=DRegs[3]=0; |
| 65 | Sync(); |
| 66 | SetWriteHandler(0x8000,0xFFFF,Mapper167_write); |
| 67 | GameStateRestore=StateRestore; |
| 68 | AddExState(&StateRegs, ~0, 0, 0); |
| 69 | } |
| 70 | |
| 71 | void Mapper167_init(void) |
| 72 | { |
| 73 | mode=0; |
| 74 | DRegs[0]=DRegs[1]=DRegs[2]=DRegs[3]=0; |
| 75 | Sync(); |
| 76 | SetWriteHandler(0x8000,0xFFFF,Mapper167_write); |
| 77 | GameStateRestore=StateRestore; |
| 78 | AddExState(&StateRegs, ~0, 0, 0); |
| 79 | } |