8 Jul
1998
8 Jul
'98
3:46 a.m.
Just a few notes: The VUP is based on the speed of the 11/780 alone. The
MicroVAX II is 0.9 VUP.
Yes, the 11/780 is a smidge faster than the uVAXII, however, I've seen .95 VUP
for the uVAXII, so I rounded up.
It will also run Ultrix (BSD UNIX). I recommend
an old version, say, 1.1.
Um... Ultrix is NOT BSD Unix. You may only have been saying that they're
similar, however.... > We always used a tu80 on our 11/730. There are
other drives you can use,
> but that was the cheapest way for us to go.
Best way to go: Find a Unibus SCSI controller. Rare,
expensive, but well
worth the cost.
I haven't seen one that I could afford. I'd love to have SCSI on *any* VAX.
I'd even considered building my own (I used to manufacture a Q-Bus/Unibus/VAXBI
line of synchronous serial cards based on the 68000). The thing that held me
back was a lack of knowledge of how to emulate an MSCP device with something
that is *not* register compatible with an RQDX[123] or UDA50. I have written
VMS device drivers from scratch, but not _disk_ device drivers.
-ethan