PDP-11/70 debugging advice

Fritz Mueller fritzm at fritzm.org
Thu Feb 4 12:19:00 CST 2021

> On Feb 3, 2021, at 8:07 PM, Josh Dersch <derschjo at gmail.com> wrote:
> Sure enough, TIGB XTAL H was a flat line.  Nothing happening at the crystal itself either.  The crystal's casing was fairly corroded (which is interesting, since nothing else on the board is) and after a tiny bit of prodding one of the legs fell off, so I'm hoping that's the culprit.

Ah.  One of the switches on the KM11 should enable the machine to run off the separate RC maintenance clock on the TIG, if you want to keep going before your new crystal shows up.

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