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1990-08-09
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31 lines
Subject: RS232C Adaptor C/64-C128
I have been getting mail regarding the RS 232 adaptor, in that the message
has gotten scrambled. So, here it is again...
******************************************************************************
Here's a simple interface to connect a C64/128
to any of the multimode boxes on the market.
This circuit has been used between a C64 and
an AEA PK-232, and an MFJ-1270 TNC. Running
the Common Sense terminal program...........
C64/128 RS232 Adaptor RS232C
====================================================
A&N --------------- Ground --------------- 1&7
B&C ------------- 2-7404-1 --------------- 3 RXD
M ------------- 3-7404-4 --------------- 2 TXD
H -------------------------------------- 8 DCD
E -------------------------------------- 20 DTR
K -------------------------------------- 5 CTS
L -------------------------------------- 6 DSR
7404 is a Hex Inverter IC. Only two sections are used.
Pin 7 is ground. Pin 14 is Vcc. This is obtained from
the C64/128 RS232C port pin #2.....
Enjoy..............
73, Kraig WB2PLW @ VE3SNP