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- These tables give the basic port and pin information for the
- Bondwell 2 laptop computer. Expansion slot pins are not given
- here because schematics are needed to make the information useful.
- 5/15/87
-
- PORT PURPOSE PORT PURPOSE
- ---- ----------------------- ---- ----------------------
- 00H parallel port A (8255) 30H slot select port
- 01H parallel port B (8255) 40H serial data reg (8251)
- 02H parallel port C (8255) 41H serial control reg
- 03H parallel control reg 50H printer output port
- 10H timer cntr reg 0 (8253) 60H floppy contrlr cmd reg
- 11H timer cntr reg 1 (8253) 61H floppy contrlr trk reg
- 12H timer cntr reg 2 (8253) 62H floppy contrlr sec reg
- 13H timer control reg 63H floppy contrlr data reg
- 20H LCD controller data reg 70H internal modem tone sel
- 21H LCD controller inst reg
-
-
- SERIAL PORT PINS PRINTER PORT PINS (CENTRONIC-LIKE)
- ------------------- ----------------------
- 1 ground 1 strobe* 10 ground
- 2 transmit data* 2 data 0 11 busy
- 3 receive data* 3 data 1 12 ground
- 4 request to send 4 data 2 13 ground
- 5 clear to send 5 data 3 14 ground
- 6 data set ready 6 data 4 15 ground
- 7 ground 7 data 5
- 8 data carr detect 8 data 6
- 9 data term ready 9 data 7
-
-
- DISK DRIVE EXPANSION PORT PINS
- ------------------------------------------------------------
- 1 +12V 8 write data* 14 +12V 20 ground
- 2 + 5V 9 write gate* 15 +12V 21 ground
- 3 + 5V 10 track 00* 16 + 5V 22 ground
- 4 index* 11 write prtct* 17 drive sel 0* 23 ground
- 5 drive sel 1* 12 read data* 18 motor on* 24 ground
- 6 direction 13 side select 19 ready* 25 ground
- 7 step*