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UNIBUS SCSI Controller wanted

hharte

Member
Joined
Apr 30, 2003
Messages
12
Location
Northern California
Hi,

I'm looking for a UNIBUS SCSI Controller for my PDP-11/44. Something from CMD or Emulex that can do disks (at least) and tapes (would be nice.)

I'm also looking for M8743 1MB RAM cards for the 11/44.

Thanks,
Howard
 

erd

Experienced Member
Joined
Apr 29, 2003
Messages
105
Location
Central OH
Me too!

Me too!

Yep... I'd love a Unibus SCSI adapter, too. Don't see them at hobbyist prices, though. :(

I've always wanted to get 2.9BSD really running on my 11/24; three RL02s just isn't enough. Now that I have an 11/44, the same goes.

I'm woefully deficient in terms of Unibus hard disk controllers - several RL11s, an RK11C, an RK11D, and a UDA50. That's about it. Many of my -11s were bench-test platforms and had a little RAM (32Kw), a DL-11 and nothing else. RT-11 is no problem (off of floppy, if nothing else), and an RL02 is fine for RSX-11M or RSTS, but 10Mb isn't enough room for any real playing around.

-ethan
 

hharte

Member
Joined
Apr 30, 2003
Messages
12
Location
Northern California
UNIBUS Disk Controllers

UNIBUS Disk Controllers

Hi Ethan,

I have an Emulex controller on my 11/44 now that emulates two RM03's per 14" SDI drive. I have two Fujitsu 160MB drives, which works out to four emulated RM03's at 80MB each. The drives work fine, but take up about half of a 6 foot rack, so SCSI would be really nice. Then I could put a bunch of different OSs on the machine and run it more frequently without generating so much heat and drawing so much current from the power company.

I do have 2.11BSD running on the machine, but with 2MB of RAM, I can't rebuild the kernel without problems. At least I think it's due to lack of RAM.
 

erd

Experienced Member
Joined
Apr 29, 2003
Messages
105
Location
Central OH
11/44 and 2BSD and disks

11/44 and 2BSD and disks

Up until I got the 11/70s (which I have not yet been able to provide power to) and the 11/44, I was woefully lacking in Split I&D machines, thus I was limited to 2.9BSD. I'd run 2.9BSD on the 11/24 with 4MB (KT24), but with a lack of disk space, I couldn't fit the sources, thus no kernel rebuilds for me, either.

I don't have a Unibus SMD controller, but I do have three SI-9900s with Massbus interfaces (for the 11/70s and an 11/750). Your 160MB Fuji sounds familiar - like the boot drive for the 11/750. The rest of my SMD disks are Fuji Eagles which, while nice and large, aren't a standard DEC size, and require driver patching to work. :(

The expense of Qbus and Unibus SCSI are one of the things that keeps me playing with old Sun equipment - even a Sun 3/60 or a SPARCstation 1 comes with SCSI (and uses SIMMs). Maxing one of those out is just a trip to the $1 bins at a Hamfest.

-ethan
 

Terry Yager

Veteran Member
Joined
May 1, 2003
Messages
8,763
Location
Saginaw, MI, USA 48601
real computing

real computing

Hey, some real computing fr a change...
(I used to have a couple of 3/60s but have donated them to a computer museum. The hard drive was nfg, and I could never get them up and running.

--T
 
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