Ethan Dicks wrote:
>--- 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
>
>
>
7474's Dead d flops? whats the story on that?
Jim
Received on Tue Jul 08 2003 - 01:19:00 BST