Re: Success (?) and observations on OLD hardware

Old computers have old, potentially underspec power supplies. This
coupled with induced high freq signals in the ground can be problematic,
but hard to diagnose.. I had no end of intermittent failures with my
video, LPT2 card and limit switch recognition (bus powered) until I
added an independent +5VDC supply to the pull up resistors. No problems
since! And don't those programming errors show up fast when the hardware
is finally running!