>Megan wrote:
> Jerome, the WCS is a separate option which plugs into one of
> the sockets normally occupied by a MICROM. The only other
> -11 that I know of which had WCS was the 11/60.
>
> The specific option of which I speak is the KUV11-AA, a
> quad-high qbus board which attaches to an 11/03 or 11/2.
Jerome Fine replies:
The two CPU boards (I have both) are the dual and the
quad 11/03 Qbus versions. I have been told they require
a BA-11 box since they are incompatible with the
22 bit backplane found in the BA23 box.
Back in the latter part of the 1970s when the 11/03
was released, I understand that the 11/03 was far
superior to anything from Intel. Even with just V3.0x
of RT-11, users had a sophisticated operating system
that was, in my opinion, better than any other single
user OS at the time - and with all the improvements
still is.
I think I used one ONLY once since it is, of course,
unable to address more than 56 KBytes (60 KBytes
with a 2 KWord I/O page) of memory. Since I
want at least 1 MByte of memory, I use at least
an 11/23 and usually an 11/83 CPU and run
RT11XM all the time.
Of course, that is still a bit slow. Most of the time
I use Ersatz-11 on a 750 MHz Pentium III, these
days with 768 MBytes of memory. The speed
is about 15 times an 11/93 - plus I can have a
RAM: disk of 512 MBytes if I wish - 16 RT-11
partitions of 32 MBytes each. It should be even
more interesting when the 3 GHz Pentium 4 is
available at a reasonable price in a year or two -
50 times the speed of an 11/93 anyone? Even
SIMH should fly at that point. It would be nice
to have an M1 or a QED 11/93, but I can't
justify that cost and those are still slower than
Ersatz-11 with a 750 MHz Pentium III.
I did not realize that the WCS (which I had heard
was a feature on these 11/03 CPUs) was a separate
option.
Sincerely yours,
Jerome Fine
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Received on Thu Oct 31 2002 - 09:35:01 GMT