IBM 3101 terminals

From: Lawrence Walker <lwalker_at_mail.interlog.com>
Date: Tue Oct 14 17:36:43 1997

> Date: Sat, 11 Oct 1997 11:08:21 +0100 (BST)
> Reply-to: classiccmp_at_u.washington.edu
> From: Tony Duell <ard_at_p850ug1.demon.co.uk>
> To: "Discussion re-collecting of classic computers" <classiccmp_at_u.washington.edu>
> Subject: Re: IBM 3101 terminals

> >
> > >
> > >
> > > > If I had space, I'd be tempted to offer one a home. But I haven't :-(
> > >
> > > You mean I'm not the olnly classiccmp member to have a space problem...
> > >
> > > Seriously, other than moving (or collecting pocket calculators), is there
> > > a cure to having more computers than floorspace for them?
> > >
> > Get rid of your couch and bed. They're taking up usefull space. Lofts
> > can also be suspended from the ceiling. : ^ ))
>
> Couch : Have done...
>
> Bed : Oh come on. I need a soft surface to put CRT's down on to avoid
> scratching the faceplate...
>
> And you can't easily suspend 50kg+ machines from the ceiling. They tend
> to fall down.. That's quite apart from the fact that many of the piles
> that start at the floor already touch the ceiling.
>
> > > DE9 (PC serial port, Atari joystick, etc)
> > > DA15 (Ethernet AUI, PC games port, etc) -- The one we're talking about
> > > DB25 (Standard RS232, PC printer port, etc)
> > > DC37 (PC external disk port, Canon CX engine interface, etc)
> > > DD50 (Sun SCSI port, etc)
> > >
> > > The high-density ones are :
> > >
> > > DE15 (PC VGA monitor)
> > > DA?? (Never seen it)
> > > DB44 (Never seen it used, but it's in the catalogues)
> > > DC62 (PC expansion cabinet, etc)
> > >
> > > -tony
> > >
> > Sorry to differ from my more knowledgeable co-respondents,
> > but I had an XT clone which had a DB15 RS2 serial port.
>
> There certainly were machines that used a 15 pin connector for the serial
> port. But...
>
> a) That connector is a DA15, not a DB15. A DB15 would be the physical
> size of a normal 25 pin connector, but with only 15 pins. It doesn't
> exist AFAIK.
>
> b) Doesn't one of the RS232-a-like standards (maybe RS232, maybe EIA232,
> maybe V24, maybe...) actually specify a 25 pin connector?
>
>
> > I searched in vain to find an adaptor for an external modem
> > and finally installed an internal one. 2 rows in a D shell.
>
> Adaptor == DA15 connector, DB25 connector, piece of wire, solder...
>
> >
> > ciao larry
>
> -tony
>
  I take it youve already divested yourself of wife, kids ,and cats
hmmm ? ; ^ ))
 I should have examined your designations more closely. I had always
thought that the DB-n ,designated shell-type and called the Atari,
C64, etc. connectors DB-9 's and the 25 pin ones db-25 s' .
Obviously the second letter is a further qualifier. I'l have to look
it up. Live and learn. IIRC even the manual that came with this
Best MARK4 xt clone referred to it as a db-15 .

ciao larry

lwalkerN0spaM_at_interlog.com
Received on Tue Oct 14 1997 - 17:36:43 BST