VAX 780 on eBay
cz at alembic.crystel.com
Sun Jan 2 23:11:43 CST 2022
Yup. The 8600's (UMBC1 and 2) were connected to Bitnet, and I was a
little Bitnaught until I found AI. It might have connected through the
Gandalf network or something else, I'd have to check old printouts.
> Can I ask for a rough translation in to comparative VAX Units of
> Performance (VUPs)? I /think/ that the VAX 11/780 was 1 VUP.
Kind of like MIPS, but I think they were going for throughput. The 780
may have had the same CPU speed as the Microvax II, but anytime you hit
disk on the MV you were slugging down to the Q-Bus speed, going through
a 4mb memory map window, and the RQDX3 wasn't either fast or very good IMO.
The 780 would plow through the MASSBUS channel interfaces directly
attached to memory (well, on a 780 everything went SBI) and
RM03/RM80/RP07 drives were way faster than RD54's. And you could go to
CI bus to talk to an HSC50 which could do more interesting stuff with
RA81's and 82's.
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