| 40 | }; |
| 41 | |
| 42 | static void Sync(void) { |
| 43 | if (unrom) { |
| 44 | int PRGPageCount = PRGROMSize / (16 * 1024); |
| 45 | setprg16(0x8000, PRGPageCount & 0xC0 | (unromData & 7)); |
| 46 | setprg16(0xC000, PRGPageCount & 0xC0 | 7); |
| 47 | setmirror(MI_V); |
| 48 | } else { |
| 49 | uint8 bank = ((cmdreg & 0x300) >> 3) | (cmdreg & 0x1F); |
| 50 | if (bank >= (PRGROMSize / (32 * 1024))) { |
| 51 | openbus = 1; |
| 52 | } else { |
| 53 | if (cmdreg & 0x400) |
| 54 | setmirror(MI_0); |
| 55 | else |
| 56 | setmirror(((cmdreg >> 13) & 1) ^ 1); |
| 57 | if (cmdreg & 0x800) { |
| 58 | setprg16(0x8000, (bank << 1) | ((cmdreg >> 12) & 1)); |
| 59 | setprg16(0xC000, (bank << 1) | ((cmdreg >> 12) & 1)); |
| 60 | } else |
| 61 | setprg32(0x8000, bank); |
| 62 | } |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | static DECLFR(M235Read) { |
| 67 | if (openbus) { |