Early PDP-11/45 backplane SPC power
fritzm at fritzm.org
Tue Jun 28 14:36:42 CDT 2016
On 06/28/2016 11:55 AM, william degnan wrote:
> DD11A or B would have power to CA1 unless you remove the wirewrap, right?
The way the prints look to me, the DD11A and B take +5V on CA2, DA2,
EA2, FA2, which is per normal for SPC slots that I've seen. I can't
find reference to CA1 in the DD11 prints, and indeed looking at the
several DD11 cards that I have on hand the CA1 pad is not connected to
Also, all the SPC pinouts I've seen list CA1 and CB1 as the NPG chain.
So it would be weird/wrong to have power there? So I'm suspecting this
is a typo in the 11/45 maint manual.
I'd be interested to know from anybody else out there who has a running
11/45 or 55, do you have +15V on slots 26-28 CU1? What about slots
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