"Zane H. Healy" wrote:
This isn't
mine, but I wish it was :-)
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2017593099
Chad Fernandez
Michigan, USA
No kidding! However, keep in mind this is one of the older Mentec
ones
from the late 80's. The M1 is the board to have as it's ~4x the speed of a
/93. Of course just about any Mentec CPU board would be nice, and I
wouldn't mind having one. For a little info on Mentec boards take a look
at
http://www.mentec.com/mentecinc/processo.htm
Jerome Fine replies:
I doubt that the M90 is any faster than the DEC PDP-11/93 since both
use the same J11 chip.
Not the M1 is definitely faster, although I would not necessarily believe
the estimate that Mentec provides - DEC also used to exaggerate the
speed of a new board. Also, does anyone know the cost of the M1?
On the other hand, I am able to run at about TEN times the speed of
an 11/93 when I use just a Pentium III 750 under Windows 98 and
Ersatz-11. The hobby version of Ersatz-11 is free and even the
commercial version of Ersatz-11 is probably less (at $ US 2999)
than an M1 CPU.
Not that there is anything wrong with an M1 if a real PDP-11
Qbus system is required. But it is possible to use a PCI <=> Qbus
adapter when Ersatz-11 does not support the emulation of
specific PDP-11 modules that are required. In that case, the
increased speed of Ersatz-11 (up to TWENTY times the speed
of an 11/93 with a Pentium IV 2 GHz (sigh and yeck at the same
time) shows that software emulation has great advantages over
a hardware solution for some applications.
Sincerely yours,
Jerome Fine
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