PDP-11/05 (was: PDP-11/05 microcode dump?)

Bill Degnan billdegnan at gmail.com
Tue Jun 15 09:15:39 CDT 2021

While we are on the subject of pdp11/05's I am in the need of repair
services for my M7261 KD11-B CPU board 1



On Tue, Jun 15, 2021, 9:59 AM Tony Duell via cctalk <cctalk at classiccmp.org>

> On Tue, Jun 15, 2021 at 6:34 AM Tom Uban via cctalk
> <cctalk at classiccmp.org> wrote:
> > My KM11s are based on Tony Duell's schematic and if you look, switches S3
> > and S4 are both driving outputs rather than simply switching them to
> ground,
> > so I don't think two boards at one time would work if these signals are
> simply
> > tied in parallel on slots A2 and B2.
> I took the switch circuits from the offical KM11 schematics which are
> either in the PDP11/45 CPU printset or the RK11-C printset that I
> have, I forget which. I certainly didn't add logic or replace
> open-collector parts with totem-pole ones.
> -tony

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