31 Oct
2002
31 Oct
'02
4:12 p.m.
Hi Eric,
I'm not sure how badly you want a M7870 board, but this fellow
has been able to locate some fairly rare parts for me at times.
Charle Burgess
QEI Incorporated
119 Great Road
Bedford, MA 01730
--tom
At 01:45 PM 10/31/2002 -0800, you wrote:
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