PDP 11/34 rebuild

From: Greg Elkin <ClassicComputers_at_bouncy-castle.demon.co.uk>
Date: Sun May 25 16:43:00 2003

Thanks Tony, Pete et al

I need to go over the backplane to find how DMA (NPR) grant thing is
wired on this sytem. Need to learn about Unibux, MUD and SPC and all
the other bits yet :)

With the M9302 terminator + SACK logic board removed, the front panel
now shows RUN briefly then BUS ERR when turning DC ON. And I can
deposit & examine data into RAM at 1000+. Trying to look at ROM at
777300 gives a BUS ERR again.

Whee, progress anyway from a week or so ago when I was worrying that
the PSU was not happy.

greg
Received on Sun May 25 2003 - 16:43:00 BST