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1321.ZIP
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SERIAL.AT
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1986-12-30
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A p p l i c a t i o n N O T E
Date: October 9, 1984 From: Chris Bradley
Product: IBM PC/AT Serial Adapter Cable
Following is a schematic diagram for the construction of a cable
which connects the PC/AT's 9-pin serial I/O port to devices using
a standard DB-25-pin connector:
AT Serial Name DB-25 connector
1 CD 8
2 RD 3
3 TD 2
4 DTR 20
5 SG 7
6 DSR 6
7 RTS 4
8 CTS 5
9 RI 22
This table will allow construction of a serial cable for the AT,
which has hitherto been difficult to obtain. Materials required
for construction are:
o 9-wire cable stock (available in XXX-foot rolls)
o DB25 male connectors
o DB-9 male connectors
o a soldering pencil and solder
o a table vise