🚀 go-pugleaf

In article <5168X@utah-cs.UUCP> cetron@cs.utah.edu.UUCP (Edward J Cetron) writes:
>In article <16886@gatech.edu> ken@gatech.edu (Ken Seefried iii) writes:
>>the 11/23, 11/23+ and 11/24...
>	same chip set, (t-11 i seem to recall) but 23+ had some outboard
>	slu's etc unlike the 23.  the 23/23+ where q-bus, the 11/24 used
>	a similar (but NOT identical) chip set and was unibus
>
I believe the F11 chips on the 11/23 11/23+ and 11/24 were identical.

>>the 11/44 and 11/45...
>	the 11/45 was a cache-less 11/70, old chip set. 11/44 was much newer
>	and used the same type of dual bus (processor-memory vs unibus) as the
>	11/70 but only had 1 set of registers unlike the 11/70...
>	(it also took LOTS less power)

The KB11-A and KB11-B were the early 11/45 and 11/70 respectively.  They
were very similar, having separate I and D space, but the 11/70 had 
22 bit addressing and a unibus map.  The floating point units were the same
as well.  The 11/70 was later upgraded to the KB11-C and the 11/45 was the
KB11-D after equivalent ECO's were performed.  I seem to remember that a major
reason for the ECO's was a floating point bug found under Unix systems.
The 11/70's main feature was the cache memory, integrated cache-memory to main
memory to RH70 massbuss which replaced the RH11 option by integrating the RH 
into the CPU's backplane.
The 11/45 had dual registers (I think) as well as the 11/70.  The 11/45,11/50
and 11/55 were the same machine with different memory configurations.  The 
11/55 was a screamer using bipolar memory and core giving very fast speed.
I think the 11/55 was the one with the later floating point option on it.
I won't go into the ones that never hit the street.

>>the 11/70, 11/73 and 11/84/83...
>	and in most (but not all) circumstances are the fastest 11's around
>('cept those fascinating rumors of 40Mhz j-11's running in liquid nitrogen
>......)

How about the rumors of the parallel multi-processor j-11's in the labs at
DEC and in DECUS?

Bill Pechter
ex-DEC Field Service
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Bill Pechter          {sun!hoptoad,cmcl2!phri}!dasys1!pechter
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