by We're in need of a parallel port loopback, or some kind of dummy printer
load, for testing a Sparc20 system that we manufacture, for RF emissions.
We have tested PC systems before with a simple loopback plug, but trying to
use this on the SS20 parallel port isn't working. We've looked at it with a
scope on a breakout box, and with the PC loopback plug in place, the printer
driver sends just the first byte, then stops. If we connect a real printer,
there doesn't seem to be anything different about the SS20 data signals from
PC data signals.
We can't actually hook a printer up to the system, because the RF from the
printer interferes with the measurements taken from the SS20 chassis.
Any ideas? Casper, do you know what kind of pin-out a loopback connector
would need? :)
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