"mxs46@po.CWRU.Edu" "Michael Sokolov" wrote:

>   Carl Makin <Carl.Makin@aipo.gov.au> wrote to me instead of port-vax that
>he has got the following reply:
>> > I have a Microvax 3100/30, KA45 board number with a TZK10 tape drive
>> > (QIC-525) and 16MB RAM.
>>
>> This 3100 should be supported.
>   No! Apparently the person who has written that was confused by the
>number 3100. This number is really MEANINGLESS. What matters is the number
>of the system board, which, as I have said before, should be KA44 rather
>than KA45. Normally, if a machine has both MicroVAX and VAXstation

The MicroVAX 3100-30 and 3100-40 (same machine, different box) use a KA45 CPU 
board. (I've never seen any reference to a KA44).

>DO NOT correspond to VS3100 M30 and M40! The correspondence between MV3100
>and VS3100 models is as follows:
>   +--------+---------+
>   | MV3100 | VS31000 |
>   +--------+---------+
>   | M10    | M30     |
>   | M10e   | M38     |
>   | M20    | M40     |
>   | M20e   | M48     |
>   +--------+---------+

The MV3100-10/20 and VS3100-30/40 do not correspond in any real way: you cannot 
convert from one to the other except by swapping the board. (It is possible that 
one board was a re-design based on the other, but otherwise they are distinct). 
Similarly the MV3100-10e/20e and VS3100-38/48 are distinct. The MV3100-10/20 use 
a KA41-A (or KA41-B in the VAXserver variant), the MV3100-10e/20e use a KA41-D 
(or KA41-E), the VS3100-30/40 use a KA42-A and the VS3100-38/48 use a KA42-B.

Antonio


Antonio Carlini                            Mail: carlini@marvin.enet.dec.com
DECnet-Plus for OpenVMS Engineering
Digital Equipment Corporation              Worton Grange, Reading, England