Re: ADT with a Laser 128

[Ed Eastman <noone@nowhere.net>]

Sounds like a hardware handshaking issue, your cable is probably not 
correctly wired for ADT to work.  You need to use the IIc wiring diagram 
for the cable.

Hang on, looking at the specs in ADT2004.zip...  Hey Jeff!  Where's the 
IIc cable diagram?? (Arghhh)  BRB...  In the man time:

The terminal software on the PC can override and ignore the hardware 
hand shaking, the ADT profgram does not concern itself.  I have 
experienced this same issue on a IIc as well becasue the hardware 
signals are not all there.  (5 pins, 8 signals.)  Try modifying your 
null modem cable to disable the hardware handdshaking on the PC side. 
Just short them togehter on the PC side:
25 pin on PC side short these together 4-5, 6-8-20
9 pin on the PC side, short these together 7-8, 6-1-4

This turns hardware hand shaking off and allows data to be transmitted/ 
receieved full speed.  This does not cause an issue on a standard 1MHz 
IIc running 19200 baud and certainly should not cause issue with a Laser 
128 running at full tilt.

Pin outs on a IIc/ Laser 128 Null modem cable:
IIc to PC 25 or 9
 RTS 1 to 5 or 8 CTS
 Tx  2 to 3 or 2 Rx
 Gnd 3 to 7 or 5 Gnd
 Rx  4 to 2 or 3 Tx
 CTS 5 to 4 or 7 RTS

Then tie 6/8/20 or 6/1/4 together on the PC side also.

Thankx,
Ed

Joshua Bell wrote:
> Just as a followup - I am able to transmit and run ADT (either stock 1.22 or
> ADTcc 1.21b) on the Laser, and either the DOS or Windows version of ADT on
> the PC. No luck - I never get past the "AWAITING ANSWER FROM PC." stage.
...
> ProTerm 2.1 can transfer files successfully, so I'm baffled. Any more
> thoughts?