8 Oct
2013
8 Oct
'13
6:34 p.m.
The 11/44 is a nice machine. It's the last true
Unibus model (as
opposed to the /84 and /94, which used the Unibus adaptor). It can
It's also. I think, the last model not to use an LSI chip for the CPU.
The CPU is mostly TTL IIRC. The FPU is full of 2901s
be pretty stoutly configured, and the power supply is
generally
fairly reliable. We're working on getting one ready for public
Although if th PSU does fail it is not necessarily trivial to repair.
It's a very complex supply with 3 chopper circuits runningoff the same
400V DC supply. One for the CPU power supplies, one for the memory power
supplies and one to power the PSU control circuit.
-tony