Western Digital PASCAL microengine

<Re: <> > 1979 <> > First multi-user operating system CROMIX (UNIX derivative) <> > <> > First multi-user operating system...what? On a micro? Maybe. <> <> Even then, dubious. When did OS-9 come out? < <IIRC, I was using a multiuser Alpha Micro (probably an AM 100) <in my apartment around June or July of 1978. It was based on the <Western Digital microengine, which emulated a DEC 11. < <Stan Lessee there are some points of order... Alpha Micro AM100 was a sorta LSI-11 in that it used the same chip set and was similar but not compatable in any way. The Western Digital PASCAL Microengine was a P-machine and operationally as well as programativcally very different from DEC PDP-11. It did however use the same chipset. The chipset is WD13 and it's functionality is determined by microms (microprogramming roms). Alpha micro was very close to the PDP-11 but far enough away to avoid copyright problems. The WD P-engine was oneof the few direct P-code executing systems (a stack machine). All very interesting machine as they were pushing the microcomputer envelope for the time. Allison