On Sun, 12 Jul 2009, Eric Smith wrote:
Which bus signals are different?
I'm not really certain, but I thought that the differences are the
"+External Horizontal Drive" and "+Printer Clock" signals.
There are other 5103 models that are intended for
other IBM computers not in
the 51xx line, and those won't work on the 5100, 5110, or 5120.
I don't think that these printers are called 5103. They may look similar
but should have different model numbers.
Christian