src/mess/machine/a7800.c
| r14534 | r14535 | |
|---|
| 17 | 17 | cart not needed when in PAL mode |
| 18 | 18 | added F18 Hornet bank select type |
| 19 | 19 | added Activision bank select type |
| 20 | | |
| 20 | 19-Feb-2010 DanB Added return values for TIA collision registers |
| 21 | 21 | ***************************************************************************/ |
| 22 | 22 | |
| 23 | 23 | #include "emu.h" |
| r14534 | r14535 | |
|---|
| 462 | 462 | { |
| 463 | 463 | switch(offset) |
| 464 | 464 | { |
| 465 | case 0x00: |
| 466 | case 0x01: |
| 467 | case 0x02: |
| 468 | case 0x03: |
| 469 | case 0x04: |
| 470 | case 0x05: |
| 471 | case 0x06: |
| 472 | case 0x07: |
| 473 | /* Even though the 7800 doesn't use the TIA graphics the collision registers should |
| 474 | still return a reasonable value */ |
| 475 | return 0x00; |
| 465 | 476 | case 0x08: |
| 466 | 477 | return((input_port_read(space->machine(), "buttons") & 0x02) << 6); |
| 467 | 478 | case 0x09: |