🚀 go-pugleaf

We had a 44 here at usc for a long time. We used it as a general
purpose system from engineering and also had an analog computer
and Adage Graphics computer attached via a channel box called an 1827.
It behaved like a lot of registers and a/ds. we also attached it to the
arpanet via a 'UCSB' network interface

We wrote our own version of a system called ps44.  The machine was
blazing fast for its time and the replacement ibm wanted to sell us
(370/145) was about the same speed. The lack of a good follow on in 
price was the start of our path down dec10s then other unix based systems.

The expansion core (where the regs where in slow mode) was an interesting
beast. If you bought the commercial feature that added several
hardwired instructions that were missing (lm,stm bxle etc) but the mvc
instructions were emulated by a program in bump core.  This memory was
also addressable by diagnosis instruction so we used it for table 
space and buffers instead of running the emulator.  We bought the
commercial feature for the instructions like load an store multiple
plus the storage protect instructions.  It was a real fun machine to
work on since it was really the forerunner in some ways or risc and
ware interesting to debug since it all in hardware.  Lots of scope
time. amazing what was done in 128kB of memory.

jim pepin