20 Oct
2023
20 Oct
'23
5:46 p.m.
On Fri, 20 Oct 2023 at 13:28, Ethan Dicks via cctalk <cctalk(a)classiccmp.org>
wrote:
On Wed, Oct 18, 2023 at 10:21 AM Henry Bent via
cctalk
<cctalk(a)classiccmp.org> wrote:
I have a SIMH installation of Ultrix-11 3.1 on RL02 drives. Two RL02s is
enough for a base system and four (which would be what the DQ614 provides,
if it worked) would be more than enough for sources and work, etc. The
Ultrix-11 RL driver does fancy things with overlapped seeks that I'm sure
works on real hardware but on the DQ614, not so much.
-Henry
Interesting. My Dilog DQ614 (ST506 emulating
RL02s) specifically does
not
work with Ultrix, but does work with 2.xBSD and
v7, so I would not
necessarily assume that a third-party board was going to work with
Ultrix-11's drivers.
I do not know what drives Ultrix-11 supports but it wouldn't be
shocking to find that you can't use an RL02 as the root install
device. An RL02 was only big enough for the base install of 2.9BSD
and not big enough for base+sources so I was never able to rebuild my
kernel (it all worked fine on an RK07 at work).