20 Sep
2016
20 Sep
'16
10:35 p.m.
21 Sep
21 Sep
7:15 a.m.
On Sep 21, 2016, at 1:35 AM, Scott Baker
<scott.l.baker at gmail.com> wrote:
http://www.ebay.com/itm/191974796676?ssPageName=STRK:MESELX:IT&_trksid=…
It says "FOR F-11" and that seems plausible judging by the label on the box
(KEF-11) shown in one of the photos. That would make it a floating point option. I
don't know if that matches the chips and whether all the right pieces are present,
though.
paul
10:24 a.m.
On 21/09/2016 15:15, Paul Koning wrote:
It says "FOR F-11" and that
seems plausible judging by the label on
the box (KEF-11) shown in one of the photos. That would make it a
floating point option. I don't know if that matches the chips and
whether all the right pieces are present, though.
The top two in the first picture are a pair of KEF11-AA floating point
microcode options for an F-11 CPU. One of those would go in either an
M8186 KDF11-A (11/23), an M8189 KDF11-B (11/23plus or microPDP-11/23) or
an M7133 KDF11-U (11/24).
The third chip is a KTF11-AA memory management unit, for any of the above.
You sometimes find a KTF11 with a KEF11 because you need the MMU to use
the floating point, as the FP microcode uses some of the MMU registers.
--
Pete
Pete Turnbull
On Sep 21, 2016, at 1:35 AM, Scott Baker
<scott.l.baker at gmail.com wrote:
http://www.ebay.com/itm/191974796676?ssPageName=STRK:MESELX:IT&_trksid=…
8:57 a.m.
On 9/21/2016 1:35 AM, Scott Baker wrote:
I recognize the box. A long time ago I purchased the KEV11 floating
point chip for the 11/2 processor and it came in a box exactly like that
one.
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dj.taylor4＠comcast.net -
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