Re: Asynch comm

Jim
     If you wish to receive and send this information you'll have to
convert to ASCII. That is to say that the LRC you have been asked for is
the result of the transmitted data (in ASCII) run through a formula
involving a binary exclusive OR. I, myself have created the communication
program your require. First of all you must speak ASCII. You will have to
use an ICF function XLATE=NO. Once you are past that step, create a program
to convert ASCII to EBCDIC and back again. If you can find an API to do it,
all the better. The conversion program I wrote also calculated the LRC.
It's your option. Look at the specs again. I am sure you'll also need to
send or receive an ENQ to establish connectivity.

Good Luck. If all else fails email me directly at mailto:ken@cm-inc.com


Ken Slaugh  (707) 795-1512 x118
Chouinard & Myhre, Inc.
AS/400 Professional Administrator/MSE
Client Access Specialist
http://www.cm-inc.com/


                                                                                
                   
                    "Jim Franz"                                                 
                   
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                    05/29/00 11:50 AM                                           
                   
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I am working on an AS/400 to a credit card authorization network.
Unfortunately no previous AS/400 has previously certified to this network.
I'm hoping someone else has seen this requirement for async communications.
The specs from the other system call for me to add an LRC code at end of
packet, "each record must be immediately followed by an LRC character that
is computed by using the XOR function on each character of the record. This
is a data integrity check." The network person on the other side is not
able to really describe what it is. Sounds like some sort of check digit
for the whole packet. Any ideas?
Jim Franz



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