HP 2116 on ebay
jwest at classiccmp.org
Sun Apr 1 11:34:02 CDT 2007
>>Wasn't there a TSB which used two 2116's, one for computation
>> and one for I/O?
To which Chris K. replied...
> I recall configurations that used a 2116 with a 2114 as the I/O
> processor; I never actually saw a 2116/2116 combination.
According to docs:
2000B main: 2116B,2116C io: 2114A,2114B
2000C main: 2100A, 2100S, 2116B, 2116C io: 2100A, 2100S, 2114A, 2114B,
2000C' main: 2100A, 2100S, 2116B, 2116C io: 2100A, 2100S, 2114B*, 2116B,
2000F main: 2100A, 2100S io: 2100A, 2100S, 2114B*, 2116B, 2116C
2000F' main: 2100A, 2100S io: 2100A, 2100S, 2114B*, 2116B, 2116C
* = if two mux sets are used (32 ports instead of 16) you need an I/O
extender if using the 2114B
Some of the specifications above make sense as to why some are missing in
the list due to slot availability. The 2114A may be missing from some due to
power draw requirements of the requisite cards - just guessing. Note the
absence of documentation on the M and E series. I know a 2105 can't be used
due to slot availability. I also know some docs said not to mix M and E
machines. I can't see any reason why not.
However, by and large, I suspect the two cpu's could really be anything.
While 2116 & 2116 isn't documented as valid I don't see any reason why it
wouldn't work. There is also specific documentation stating that you can't
mix 2100A/S and 21MX systems. Once the system is up and running I suspect
there is no reason why you couldn't mix them. However, booting them in a
mixed setup may be difficult as I remember some issues about the paper tape
cross loader that made loading different between 21MX and 2100 systems. That
may cause an issue mixing them. I'd have to go back and refresh my memory on
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