--- Robert Krten <root_at_parse.com> wrote:
> For those of you who missed the announcement in alt.sys.pdp8,
> I've now almost completed the M220 version B schematic. It's
> available at:
>
> http://www.parse.com/~pdp8/pdp8i/m220b.html
Cool! Thanks! I have a few M220 cards that will eventually benefit
from your efforts (I borrowed them from a parts machine to keep the
main machines running).
> The trials and tribulations of the PDP-8/I restoration can be
> found at:
>
> http://www.parse.com/~pdp8/pdp8i/restore.html
>
> Plenty-o-dead 7474's in that one :-)
That's been my experience, too. I have replaced as many as 8 7474s
at a go to get an -8/L back on its feet. I don't recall replacing
any other chip, as a matter of fact.
-ethan
Received on Tue Jul 08 2003 - 00:30:01 BST