On Oct 18, 10:47, Ram Meenakshisundaram wrote:
> Hi,
>
> Is there any SCSI-based *floppy* drives either in 3.5 or 5.25 (3.5
> preferred) format? I might need one for a project I am working on...
The well-known ones seem to be the flopticals made by Insite (20MB SCSI-1,
but can also read/write 1.44M and 720K floppies). They turn up from time
to time, usually quite cheap. However, TEAC made a 3.5" SCSI floppy (with
motorised eject) -- sorry, I can't remember the TEAC part number -- which
SGI used in some Indigo workstations. They also used it in an external box
for Indigos and Indys. DEC made an adaptor for RX23 (3.5") drives, which I
know works wth generic 3.5" floppies (I've got one somewhere); there was
also an adaptor by a German company called Eltec.
BTW, SCSI-2 should work fine on a SCSI-1 system. You just won't get some
of the extra twiddly SCSI-2 features.
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
Yesterday, in response to Neil Cherry's post on his DEC machine I wrote:
> Just behind the memory is the video frame buffer. It is either
> a VFB02 mono, or a VFB02 color (p/n 54-19469-01).
Correction: the mono video frame buffer is a VFB01
Later Neil Cherry <ncherry(a)home.net> wrote:
> According to message I found during a web search, I may have purchased a
> lemon. It states that the machine won't boot without a keyboard and mouse.
> Well I don't have any. I'll have to hunt them down and then load *BSD.
To which Mike Ford <mikeford(a)socal.rr.com> wrote:
> No idea on mice, but I still have some LK201 and LK401 DEC keyboards.
Hey Neil, given your 'lemon', some water & sugar: Lemonade!
I have also got some spare LK201's. Also buried deep somewhere is
a couple unused hockey puck mice still in the original box, and they
lastest haul included a bag of hockey pucks as well.
Also adding his two bits was "Sean Caron" <sean(a)techcare.com> and he wrote:
> You may have read about the insidious mouse port dependency on these
> machines :)
> These systems must have either a mouse or a "mouse port terminator"
> installed on them to boot NetBSD (and others, perhaps) from the graphics
console. I think
> more information on them can be found on the NetBSD/pmax Web site, or you
could
> also probably look it up by typing something like "DECstation 3100 mouse
> terminator" into your favorite search engine.
Here's the info:
: How can I run a DECstation without the display?
: (From the Ultrix FAQ found at ftp.digital.com)
: To turn a DECstation 2100/3100 into a DECsystem 2100/3100 you need to:
: 1. Remove the Graphics board, keyboard and mouse.
: 2. Put a mouse loopback connector in the hole for the mouse plug.
: The loopback connector part number is: 12-25628-01
: To make your own:
: Short Transmit data to Receive Data, pins 2->4 as shown in the diagram.
: (view looking at the plug).
: 5 6 7
: o o o
: 4 o === o 1
: o o
: 3 2
> I'm not sure if its a problem if you boot the system off a serial console
> (which, incidentially, you can do; just hook up a terminal to the port with
> the printer icon next to it and flip the little DIP switch S3 on the back
> of the system - then you don't even need a mouse, keyboard, or monitor).
Sean, here I will have to say: Huh? There is no DIP switch on the back of
a DECstation 3100's. Is this something on the back of a VAXstation 3100?
If so, I thought we decided this was a DECstation 3100.
> Unfortunately, unless you have a MMJ terminal (VT3/400 series) you'll need
> to either buy or build a converter to break out MMJ to something more
> useful. The only problem is that (out here, at least), MMJ plugs are just
> about impossible to find and the converters (MMJ->DB25) cost $25 from DEC.
> Ouch!
Ouch is right, never knew DEC wanted that much. Maybe I need to take
my shoe box full of 'em to my safe deposit box. ;-))
And then Neil Cherry wrote:
> 2 ways around that problem, minor surgery (exacto blade) or major surgery
> (remove MMJ and solder in appropriate 6 pin RJ outlet). I think I'll
> start with the exacto first. Actually there is a 3rd method I'll try first
> and that is the exacto the RJ11 plug so it no longer has the tab on it.
Neil, if you want to use a PC as a terminal and need one, I have a couple
spare MMJ cables. Or in case you want to 'roll your own' I will post a
'fact file' on MMJ. I have posted it here in the past, but probably not
a bad idea to post again.
Mike
The BA123 is 22 bit. I use one for a test bed and always keep a spare as I
run it with the covers off and have fried a few power supplies over the
years. The fans just don't do the job with all the covers off.:(. The
BA123 is much nicer on the hands to swap boards than a BA23.
Dan
-----Original Message-----
From: Gene Buckle <geneb(a)deltasoft.com>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Thursday, October 19, 2000 11:03 AM
Subject: Re: BA23 w/RA70
> >Be very careful with that chassis! If it was really a MicroPDP, it will
> >have an 18 bit qbus backplane in it. It will _destroy_ 22 bit qbus
boards
> >since there are power pins on the 18 bit bus that mate to data pins on
the
> >22 bit bus.
> >
> >Then again, my memory may be completely broken and I've got it all wrong.
> :)
> >
> >g.
>
> I think you are remembering the BA11S and others. All the BA23's I have
had
> and seen have all had 22 bit backplanes. ( I have at least 15 BA23's at
the
> moment.)
I think I was thinking of the BA123 I've got that IS a uPDP-11. (full of
boards too *sigh*)
g.
Heh, yes, it definetly is in my price range, but what would I do with 2
11/780's? I only really need to have one...
Will J
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> Neil Cherry <ncherry(a)home.net> wrote:
>
> > On EBAY there is an 11 7/80 (currently 6 cents). The guy has no where to
> > put it and hopes someone can pick it up. It's located in Greencastle IN
>
> > Anyone?
>
> A little too much heavy metal for me.
>
> Then Douglas Quebbeman <dhquebbeman(a)theestopinalgroup.com> wrote:
>
> > This is a very large system, right? 72-inch cabinets, 220v 3-phase
juice,
> > etc? I ask because it's relatively close.
>
> Define 'relatively close'.
Well, Indy is a straight shot from here up I-65; Greencastle is a bit
to the west of Indy. Going up Indiana 60 to Indiana 37, then to
Bloomington, then up US 231 to Greencastle, just a nice day trip.
But Cliff wants it, so Cliff gets it (hopefully)...
> And "Clint Wolff (VAX collector)" <vaxman(a)uswest.net> chimed in:
>
> > No! Don't do it! :)
>
> > I'm hoping to win this one... I may have to sell some of my
> > junk to make room for it, but sacrifices must be made...
>
> Hey Clint, when you drive over to pick it up, stop by and pick me
> up. I live just off I70 about 40 minutes from there. I'll either help
> you load it or remind you how nuts we all are. Then on the way back
> we can stop by my place and 'balance' the load with some other VAX stuff.
> God knows we could all use some 'balance', ey?
Ah, another Hoosier.... ok, I live in Clarksville, down here in
Kentuckiana. But I really don't want any more big iron anyway
until I can get my Prime 2455 running again. I was midway through
a project of transferring files from magtape to a PC when the PSU
died. Additionally, I'm seriously thinking of running it as a
space heater.
regards,
-dq
pete(a)dunnington.u-net.com (Pete Turnbull) wrote:
> DEC made an adaptor for RX23 (3.5") drives, which I
> know works wth generic 3.5" floppies (I've got one somewhere)
Roger Ivie <rivie(a)teraglobal.com> wrote:
> The DEC adapter also works with 5.25" high density drives.
The DEC SCSI adapter is p/n 54-19288-01, and it is used with a mounting
bracket p/n 74-39094-01. This mounting bracket provides a place to mount
the SCSI adapter circuit board as well as the RX23. The RX23 is connected
to the adapter with cable p/n 17-02221-02.
Mike
There is a guy named Charles in Vermont (the Junk Giant) who has a boxed
Apple //c, boxed Apple //c monitor (the little cute one with the stand)
and a boxed Imagewriter printer.
He wants to sell it. I told him $60 + shipping would be a fair ballpark
figure for the lot.
Contact him directly at <junkgiant(a)juno.com>. He's a nice guy.
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
I need to test a few NeXT monitors, and I assume that I can not hot swap
the monitors, what with the Power button turning on the monitor and the
kb and mouse going through the monitor.
Am I thinking correctly here?
I was thinking about building a breakout box for the monitor, sort of
a 'Y' cable thing with only the video going to the second monitor.
Of course the first thing I need is three 19 pin D connectors. The
connectors are not listed in catalogs, DigiKey, Jameo, Altex, etc.
Were these connectors custom made and only used in the NeXT? Anybody ever
seen 19 pin used elsewhere or have any idea where I might find some?
I had originally thought I would just wait until the testing turned up
three bad monitors and then use the connectors out of those. I then
decided to build the breakout box before I get started. Sort of a
Catch 22, I need to find three bad monitors to build a breakout box
to test the monitors.
Mike
Zane <healyzh(a)aracnet.com> wrote:
>> What's "direct access?"
> Basically you start with a selection of items, and when you select one it
> allows you to either run an app or go to another menu (not sure how deep you
> can go on menus). Has at least some sort of password protect on stuff, as I
> recall though not terribly secure.
The phrase 'not terribly secure' is being nice. Given a password of
1234
whose bits are
01000001 01000010 01000011 01000100
The password was stored in a config file with the characters of the
password reversed
4321
and IIRC, the bits were reversed also.
00100010 11000010 01000010 10000010
I worked in a TV Studio years ago and the production manager was a butthead.
When he wasn't around I would go to the computer in the main office and
pop in a floppy and reboot. The autoexec ran a program I wrote which
decoded the passwords and wrote them to a file on the floppy and then
rebooted the machine bringing it right back into Direct Access. It was
months before he caught on.
Mike
Neil Cherry <ncherry(a)home.net> wrote:
> On EBAY there is an 11 7/80 (currently 6 cents). The guy has no where to
> put it and hopes someone can pick it up. It's located in Greencastle IN
> Anyone?
A little too much heavy metal for me.
Then Douglas Quebbeman <dhquebbeman(a)theestopinalgroup.com> wrote:
> This is a very large system, right? 72-inch cabinets, 220v 3-phase juice,
> etc? I ask because it's relatively close.
Define 'relatively close'.
And "Clint Wolff (VAX collector)" <vaxman(a)uswest.net> chimed in:
> No! Don't do it! :)
> I'm hoping to win this one... I may have to sell some of my
> junk to make room for it, but sacrifices must be made...
Hey Clint, when you drive over to pick it up, stop by and pick me
up. I live just off I70 about 40 minutes from there. I'll either help
you load it or remind you how nuts we all are. Then on the way back
we can stop by my place and 'balance' the load with some other VAX stuff.
God knows we could all use some 'balance', ey?
Mike
