RE: Asynch comm

[Tim McCarthy <timm@xxxxxxxxxxxx>]

> I am working on an AS/400 to a credit card authorization network.
> Unfortunately no previous AS/400 has previously certified to this
> network.
        [Tim McCarthy]  This may not necessary be true. It's probable
that they're unaware that the remote is an AS/400. Our ZMOD package
talks to lots of CC agencies. 
>  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."
        [Tim McCarthy]  The Longitudinal Redundancy Check is a form of
check digit. Unfortunately the term LRC has been applied to everything
from a checksum to a CRC. In your case it's going to be the resultant
character when each ASCII character in the string you're sending has
been XOR'ed together.
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