trunk/src/mess/drivers/cat.c
| r32112 | r32113 | |
|---|
| 856 | 856 | // 0x860000: 'tcb' "test control bits" test mode register; what the bits do is |
| 857 | 857 | // unknown. 0x0000 is written here to disable test mode, and that is the extent |
| 858 | 858 | // of the cat touching this register. |
| 859 | | // it is possible that writing ANYTHING here will set the PFAIL state from 0 to 1, assuming the guessed information about pfail above is correct. |
| 860 | 859 | WRITE16_MEMBER( cat_state::cat_tcb_w ) |
| 861 | 860 | { |
| 862 | 861 | #ifdef DEBUG_TEST_W |
| r32112 | r32113 | |
|---|
| 909 | 908 | 0 1 0 0 0 R {'fd.status'} Floppy status lines (write protect, ready, index, track0) |
| 910 | 909 | 0 1 0 1 0 R Keyboard Column Read |
| 911 | 910 | 0 1 1 0 0 W? Unknown (reads as 0x00) |
| 912 | | 0 1 1 1 0 RW Read: Battery status (MSB bit, 0 = ok, 1 = dead, other bits read as 0)/Write: Centronics Printer and Keyboard LED/Country Code Related |
| 911 | 0 1 1 1 0 RW {'pr.cont'} Read: Battery status (MSB bit, 0 = ok, 1 = dead, other bits read as 0)/Write: Centronics Printer and Keyboard LED/Country Code Related |
| 913 | 912 | 1 x x x 0 W? Unknown (reads as 0x00) |
| 914 | 913 | 1 0 0 x x 0 0 1 x x x x x x x x x x x * * * * 1 RW {'duart'} 68681 DUART at ic34 [controlled via GA2 /DUARTCS] |
| 915 | 914 | 1 0 0 x x 0 1 0 x x x x x x x x x x * * * * * 0 RW {'modem'} Modem Chip AMI S35213 @ IC37 DATA BIT 7 ONLY [controlled via GA2 /SMCS] |