Renee@cup.portal.com (Renee Linda Roberts) (05/14/91)
I looking for the pin-outs for the RAMdrive and the bus connector. I also need any known BIOS calls for the PF. (An important one especially is: Is INT 13 active for drive IO?) Thanks! -
ardai@bass.bu.edu (Michael Ardai) (05/16/91)
In article <42316@cup.portal.com> Renee@cup.portal.com (Renee Linda Roberts) writes: >I looking for the pin-outs for the RAMdrive and the bus connector. I also need >any known BIOS calls for the PF. (An important one especially is: Is INT 13 >active for drive IO?) RAM port: Pin 1 on right with fingers up and pointing towards you 1 A16 2 A15 3 (RAM) Vbb battery voltage (32k and 128k OTP) Vpp 12.5V PGM, 5V normally (64k OTP, ROM) NC 4 A12 5 A7 6 A6 7 A5 8 A4 9 A3 10 A2 11 A1 12 A0 13 D0 14 D1 15 D2 16 GND 17 D3 18 D4 19 D5 20 D6 21 D7 22 CE 23 A10 24 (64k OTP) OE/Vpp (All others) OE 25 A11 26 A9 27 A8 28 A13 29 A14 30 (RAM) WE (128k OTP) PGM=0V (All others) NC 31 Vcc 32 CDET (Small pin connected to ground to detect presence of card) Expansion: Pin 1 on top right looking into Pofo. 2 on bottom right. ABUF 1 2 5VS REDY 3 4 Vcc BCOM 5 6 NCC1 NMD1 7 8 WAKE DTR 9 10 DEN PDET 11 12 IINT CCLK 13 14 MRST HLDA 15 16 HLDO IACK 17 18 CDET IO/M 19 20 A19 A18 21 22 A17 A16 23 24 A15 A14 25 26 A13 A12 27 28 A11 A10 29 30 A9 A8 31 32 VRAM HLDI 33 34 ALE GND 35 36 NMIO OA7 37 38 OA6 OA5 39 40 OA4 OA3 41 42 OA2 OA1 43 44 OA0 AD0 45 46 AD1 AD2 47 48 AD3 AD4 49 50 AD5 AD6 51 52 AD7 EINT 53 54 NRDI VEXT 55 56 EACK BATD 57 58 NWRI 5VS 59 60 BBUF BIOS: Pofo differences from PC: 09H (KBD) 10h (Video mode 07-0a, only text mode) 13h (Disk/ram card 00 - 05 and 83) 15h (extended, not supported) 16h (KBD service 0,1,2,4) 18h (BASIC not supported) 1A (clock 00 - 07) 1ch (timer, less frequent than on PC) 61h (Pofo specific) I would highly recommend getting the Pofo Technical Reference Guide from Atari if you plan to do any real hacking on it. Good luck. /mike -- \|/ Michael L. Ardai N1IST Teradyne EDA East --- ------------------------------------------------------------------------- /|\ ardai@bu-pub.bu.edu ...!sun!teda!ardai (preferred) (617) 254-3420