In search of qbus WCS...

From: Eric Smith <eric_at_brouhaha.com>
Date: Thu Oct 31 15:53:48 2002

> Jerome Fine replies:
>
> I probably do have both the dual and quad 11/03 CPU
> boards. Do they have the WCS? I seem to remember
> that the 11/44 also has the WCS? But since you did not
> mention which CPU modules have the WCS, it might
> help others who do have a WCS CPU.

No PDP-11 had WCS as a standard feature. WCS options were
available for the 11/03 (LSI-11) and 11/60.

The 11/03 version is the KUV11, M8018. It's a quad-height module.

The KUV11 needs to be cabled to a specific MICROM socket on the M7264
module; it will not work on the half-height LSI-11/2 module (M7270).
The KUV11 can be loaded with the EIS/FIS microcode (equivalent to the
KEV11 MICROM), with 512 words left over for user microcode. Or you can
use all 1024 words for user microcode, subject to some restrictions.
If you have the single-hybrid-chip version of the KEV11, you can use
it with the KUV11, and strap the latter to only respond to the last
512 words of the microcode address space.

The 11/60 version is the KU116, M7870. I'm looking for one of these.

There was a third-party WCS option for the PDP-11/45; there may have
been third-party WCS options for other models.

> I think one board has all 5 chips. I suspect that means it
> has the EIS/FIP chip?

It has the two-chip version of the option, so there is no socket left
for the WCS. You'd have to remove the KEV11 chips to use the WCS.

Eric
Received on Thu Oct 31 2002 - 15:53:48 GMT