16 Mar
2007
16 Mar
'07
10:05 a.m.
On 16 Mar 2007 at 2:21, G Manuel (GMC) wrote:
Do you need a Credit Card Terminal? If so I have one
you can have for the
shipping cost. Let me know and I will dig it out and give you all the specs
and such. It is maybe 10 years old and is a Hypercom Unit I believe.
No, we have one already, so I don't know what I'd do with one. It
might be fun as a "fool around" box, but most of these are 8051-type
boxes. A Z80/Z800/x86 model might be interesting however.
Back around 1992, our merchant card services tried to set up on-line
credit card transaction recording and asked if we wanted to
participate. We got a whole bunch of documents about how the system
internals operated. That's all probably changed now--and we signed
an NDA at any rate.
But I did write a few BASIC programs for filling in "Luhn" codes.
More than a few times, a customer would hand-write or copy his credit
card number and one or more digits would be unreadable. It was
pretty simple to write a little program to take "?" for the unknown
digits and back-compute the possibilities. It saved us a lot of
trouble on a couple of occasions.
Cheers,
Chuck