billdeg
Technician
I have been told that one can aquire a SCSI controller card for a DEC 11/05, a SCSI drive, and use these to install RT11 or UNIX (with enough RAM). Anyone done this before? Suggestions?
I have been told that one can aquire a SCSI controller card for a DEC 11/05, a SCSI drive, and use these to install RT11 or UNIX (with enough RAM). Anyone done this before? Suggestions?
However, scsi controllers for unibus or qbus are expensive as heck! They are rare and quite sought after. If I find one, I will definitely keep it for myself
I got given one last week, with some other bits & bats! And I'm sorry, that's staying this side of the pond too, as it gives me another boot possibility.
It appears that it's bootable, and is recognised by RSTS-E
Make is CMD and model is CDU-720
Edit- It doesn't mention that it's compatible with the '05
Today, I not only found someone willing to sell me a ASR-33 (will pick it up next week)
He hasn't got 2 has he!
I must do some more prodding.
Wow, great finds on both counts - congratulations! Those are two things pretty high up on my wanted list, too.Today, I not only found someone willing to sell me a ASR-33 (will pick it up next week) but I also decided to take a closer look at a VAXServer 3800 I aquired a few months ago. There was a mystery card in there which turns out to be a third party qbus scsi card :D :D
Wow, great finds on both counts - congratulations! Those are two things pretty high up on my wanted list, too.
Re. your new signature: as you probably figured out, the mux == multiplexer. A DECmux is for accessing a bunch of asynchronous devices over a shared line, kind of like a terminal server. It is however only the multiplexer part - unlike the DECservers which had networking built in, you needed to connect your DECmux(es) to a MUXserver to reach them over Ethernet.
It's hardware but yes, there's not much out there. I did find this MUXserver Network Reference Manual though.I figured it was something like that, but I have found absolutely zero documentation. Is the MUXserver a hardware or a software?
Not sure. You might be able to set up some device sharing between the stuff connected to it, but I think you need the MUXserver to do anything very useful. Would be a nice project to emulate one!Is the DECmux of any use without the server?
(It has an 8080, i think, and some roms in it).
Yeah - sorry, Bill ;-) If this was a mailing list I'd have changed the subject header by now.hmm, maybe I should break this out in a new thread.
Looking good! The 11/40 actually came in an even bigger chassis than that, although the bottom half was covered with a filler panel so externally it looked only as big as the console. The 21" chassis (that's 12U in new money) had its backplane mounted vertically and, after pulling the whole thing out on rails, the boards when in from the side.I have finished piecing together a bare-bones 11/05 from parts. It has functional core memory and it's the tall chassis model like the 11/40:
All you need for that is a Unibus SLU (serial line unit) such as a DL11. There are many models but IIRC with the LA36 you have the choice of RS-232 or 20ma current loop, so any old one should do.I need next to figure out how to do more than just interact with just the front panel. Specifically I would like to use a LA36 as a printer / terminal.
You missed out "heavy" ;-) Even the tiny little MicroVAX 2000 weighs a ton as practically everything is made from pretty thick guage sheet metal.One thing that I like about DEC stuff is that it's solid and rugged, and you can still get parts.
With any luck you might have a console emulator on one of them and maybe bootstraps for contemporary storage devices. It's worth looking through the docs for the particular bootstrap card (they're often combined cards which function as Unibus terminators) as there can be a lot of jumpers to fiddle with before you get them to do what you want.I have a few boards that appear to be bootstrap boards, but I am not sure exactly their original function or intention other than the fact that they're for the 11/05. I will install them and then see where they're loading into memory, maybe RT11 bootstrap is amongst the ROMS. I still have work to do.