I have a VAX-11/751 that could be available, if someone dangles a nice
enough carrot in front of me. The '751 is the oddball rackmount
version of the VAX-11/750. It is currently in an Applicon cabinet,
which is going away pretty quickly. The rest of the Applicon CAD
system is long gone - I never had it.
I have not tested the VAX, but it looks to be in very nice condition.
Tempt me with mainframe stuff, or older minicomputer stuff. Or tempt
me other ways.
When is the last time you saw a '751, VAX collectors?
--
Will, in 10512
>>>>> the collection is worth millions, though my estimate is $990,000.
There is an episode of Taxi where Jim burns down Louie's (Danny DeVito's) apartment and Louie, knowing that Jim's dad is super rich, tries to decide on the exact right amount to ask for in monetary compensation, not too little, not too much, getting close to nice round numbers, but avoiding nice round numbers:
http://www.youtube.com/watch?v=urcsxzXAUeA
> I assume that it would be extremely difficult, probably not worth the
> effort, to modify the high order byte of the MFPT instruction at this
> point for the 3rd party PDP-11 CPU boards, such as from Mentec.
> Can anyone comment on this assumption? Might there be another
> way for hardware to the tell a user which 3rd party board is being
> used as a PDP-11?
Late versions of 11M+ use some fine details (timing?) to differentiate between a J11, and the Mentec M1 and M100 (not J11 based).
Most of the 3rd party boards (including much of the Mentec stuff) are "just J11's" maybe sped up/speed selected.
Tim.
----- Original Message:
Date: Sat, 14 Jan 2012 19:56:28 -0200
From: "Alexandre Souza - Listas" <pu1bzz.listas at gmail.com>
> I don't have a Mod IV. But if I build something here in Brazil, will you
> be able to duplicate it there?
As long as the instructions aren't in Portuguese ;-)
You might also talk to Jim Brain; he had/has/will have a PS/2 > matrix kbd
adapter for CBM machines and I assume that it would just be a matter of
revising the matrix layout for a Mod IV.
http://store.go4retro.com/c-key-keyboard-adapter/
I gather that although the old version is still available he's more or less
abandoned it and is working on a more flexible USB version now.
Someone else is also working on a cheap and simple version for a PET, but
there's always room for one more, especially if it actually appears ;-)
*************************************************
----- Original Message -----
From: "Al Hartman" <alhartman at yahoo.com>
To: <cctalk at classiccmp.org>
Sent: Saturday, January 14, 2012 6:11 PM
Subject: PS/2 Keyboard adapter for TRS-80?
> Does anyone on the list know if there is an adapter for TRS-80s (Model
> I/III/IV) to use PS/2 Keyboards?
>
> Cloud-9 makes one for the Color Computer, but the keyboard matrix between
> the two families are slightly different.
>
> My friend has a Model IV with a bad keyboard (the thin film ribbon is
> damaged) and replacement keyboards don't come up on eBay all that often.
>
> Thanks!
>
> Al Hartman
### Apologies for cross-posting / multiple copies ###
Call for Paper ACM conference Computing Frontier 2012
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Author Notification March 7, 2012
Best wishes,
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On 2012-01-17 07.58, Eric Smith<eric at brouhaha.com> wrote:
> Jonathan Katz wrote:
> > So there isn't an RS-232 or similar off the back and you can't just
> jack it into your Linux box?
>
> I think it uses some kind of multidrop signalling rather than EIA-232.
>
> Even if it uses EIA-232, it's still not going to be much use on a Linux
> box, unless you write Linux software that knows how to talk to it. It
> is a block-mode terminal, not character mode. It doesn't send one byte
> over a serial port every time you hit a key, and it doesn't display a
> character each time a byte comes in. Trying to use it on a serial line
> with a getty process would be an exercise in futility.
No.
The VT62 use a normal RS-232 serial asynch line, sending and receiving
bytes just like any other plain terminal.
It really is just an improved VT52, adding a reverse video attribute.
I had one, which I used for about 15 years. It's still around, but I
more or less donated it to a computer club.
If you want to hook it up to your Unix system, just go ahead. No
problems. However, unless you create a termcap entry, you'll probably be
stuck with the VT52 entry, which means you won't see any reverse video
stuff anywhere, since I don't think any termcap/terminfo databases I've
seen ever had the VT62.
Johnny
All,
During further sorting out of the stuff I collected from our company
as part of their inventory cleanup I came across some Qbus industrial
I/O boards.
They are :
A410 - IAV11-A 4/12 channel A/D converter
A6007 - IAV11-B 4 channel isolated 20mA D/A converter
A029 - IAV11-C 16 channel expansion mux.
M6029 - IDV11-B 16 bit opto isolated output
M8005 - IDV11-C 16 bit relay output
M5026 - 16 bit opto isolated input with cable and bulkhead connector
and a matching test connector for the IAV11-B
All 6 cards are dual height ones and are very clean and still sealed
in their a.s. bags.
Make me an offer for one or more cards.
As usual, the items are located in the Netherlands.
Ed
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