User`s guide

______________________________
From: Steph and Gist
024- What cable can I use to do Apple IIc <---> PC ADT
transfers?
Below is the pinout for a IIc NULL modem cable for use with the ADT disk
image transfer utility. It shows signal names and signal directions.
Both 9 and 25-pin numbering is shown for the PC connector end. For the IIc
plug, DIN-5 pin numbers are listed with traditional Apple pin numbers in
parenthensis ...
DIN-5M Dsub9 or Dsub25
(Apple) 9 pins 25 pins
4 (2) TXD --> 2 RXD 3 RXD
5 (4) RXD <-- 3 TXD 2 TXD
2 (3) GND --- 5 GND 7 GND
1 (1) DTR --> 6 DSR --,* 6 DSR --,*
1 DCD --' 8 DCD --'
3 (5) DSR/DCD <-- 4 DTR 20 DTR
* pins connected by a jumper
Usual Apple numbering for a male cable connector (plug) as viewed looking
at the pins from the front is ...
1 5
2 4
3
Whether the PC Dsub connector is male or female depends upon what it needs to
plug into.
______________________________
From: Aage Rettvin
I constructed a new shielded five-lead cable with the above pin assignment
setup for a Dsub25 plug with the correct jumpering of pins 6 and 8. This cable
design basically corresponds to the wiring for a standard serial- printer cable
(type: Imagewriter-I).
But, even running under MS-DOS 6.22, the software failed to get
communications going!
During troubleshooting I confirmed that the cable was OK by using Hyperterm
(on the PC) to force a text-file transfer to the ADT "Receive" or "Directory"