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BW2INFO.TXT
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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*