On Sun, Mar 22, 2020 at 8:21 PM Dan Gahlinger <dgahl...@hotmail.com> wrote: > I believe it was a Vax 730 with a PDP-8 FEP, inside the main chassis it > actually had a part labelled (in big letters) "FUBAR" > > If I remember correctly, it ran VMS v2.4
I'm pretty sure VMS 3.0 was the first to support the 11/730 (the 11/730 came out in April, 1982 and VMS 3.0 release notes are dated May, 1982, and mentions that the upgrade scripts do not work with the 11/730 - you have to follow the install procedure). I _think_ VMS 2.3 and the 11/750 are contemporary. There is definitely an install guide for VMS 2.3 on the 11/750. I don't recall if you could load VMS 2.2 on a 11/750 or not. What is clear is that VMS 2.0 is documented in the release notes that the SID register has to have a CPU type of '1' and a min ECO of '3' (the 11/750 is a CPU type '2'). Using a PDP-8 as an FEP on any VAX definitely sounds odd. The 11/780 (and 11/782 and 11/785) used a PDP-11 as the FEP. The console medium was the RX01. The 11/750 has an embedded console processor; I'm not quite sure how they implemented it (11/750 microcode?) The 11/730 has an 8085 that you talk to first that reads files off a console TU58 and pokes shared resources on the VAX processor (much more like an 11/780 than the 11/750). The differences made life in the 80s festive for a new System Manager learning how they worked. > Note: someone decades ago told me the plural for Vax was "Vaxen", and it just > stuck... Yep. That's normal usage. Cheers, -ethan _______________________________________________ Simh mailing list Simh@trailing-edge.com http://mailman.trailing-edge.com/mailman/listinfo/simh
