PDP-8 diagnostics SR settings?
charlesmorris800 at centurytel.net
Sat Sep 5 19:39:11 CDT 2015
Looks like I spoke too soon. The dreaded RL8A failure has returned!
I made a new OS/8 RL02 pack on vtserver (took the expected three hours at
9600 baud console speed). Booted up the 8/A, so far so good.
But then Drive 0 faulted and OS/8 crashed... restarted and it crashed a few
seconds later again.
I flexed the middle of the RL8A upwards and the system worked. For a while.
Then it crashed and wouldn't reboot.
Back to where I was earlier in the week - won't even allow SerialDisk to
boot if the RL8A is in the backplane. OS/8 on the SerialDisk virtual RK05
works flawlessly if the card is removed.
Obviously there is still an intermittent which has come back. Maybe there's
a tiny thread of something conductive stuck under one of the IC's and I
managed to temporarily clear it as I described.
Anyhow I am resuming my search for a good RL8A. I have wasted enough
man-hours on this flaky board.
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