50 pin SCSI to 50 pin centronics

From: Richard Erlacher <edick_at_idcomm.com>
Date: Wed Apr 11 18:53:37 2001

Anything's possible for the military establishment, but I'd not bet on it being
right more than 1 ppm. This connector family is not old enough, methinks, to be
in any military standards. After all, they still love those nearly $1k/each in
100k quanatity 38999-series connectors and they still require that the wire be
#16 and soldered. A reference in a military document doesn't make it right.
You need a Centronics document.

Dick

----- Original Message -----
From: "Russ Blakeman" <rhblake_at_bigfoot.com>
To: <classiccmp_at_classiccmp.org>
Sent: Wednesday, April 11, 2001 4:17 PM
Subject: RE: 50 pin SCSI to 50 pin centronics


> I'll have to dig but it was always referenced as a CENTRONICS-36 or
> CENTRONICS-50 in our MIL-STD books and HP manuals when I was a
> missile/eleectronics tech in the AF, until 95 when I retired. I keep contact
> with a former coworker in OK that works for a contractor for the ACM/ALCM
> project office and he has tons of references in his office and might be able
> to locate it and fax or attach a copy to me.
>
> > -----Original Message-----
> > From: owner-classiccmp_at_classiccmp.org
> > [mailto:owner-classiccmp_at_classiccmp.org]On Behalf Of Tony Duell
> > Sent: Wednesday, April 11, 2001 4:07 PM
> > To: classiccmp_at_classiccmp.org
> > Subject: Re: 50 pin SCSI to 50 pin centronics
> >
> >
> > >
> > > The 50 pin with the hooks on the side is actually referred to as a
> > > Centronics 50 pin, or SCSI-I (external SCSI as well on older
> > machines before
> > > SCSI-2 came along)
> >
> > Do you have a reference for that (note : after the long discussion we had
> > a couple of weeks back on the D-connector names, I am not going to take
> > 'Well %company call them that in the catalogues' as a reference)?
> >
> > > Most companies in the way back used either what was cheap or
> > had specials
> > > made up just to keep you coming to them for cables,
> > connectors, etc. Why
> > > does Apple had a different AUI port than anyone else? Why are
> > there 9 pin
> > > and 25 pin RS-232's.....Why is Apple's on an 8pin mini-din?
> >
> > We went through this a few weeks back, didn't we? As I understand it :
> >
> > The Apple AUI port is different partly because it uses a 5V supply rather
> > than the 12V one on a standard AUI port. So I guess it makes sense to
> > have a different connector. We can argue for months whether Apple should
> > have stuck to the standards, though.
> >
> > IIRC, the RS232 standard specifies a 25 pin connector. So strictly there
> > are no 9 pin RS232 ports. If you mean why do PC/AT machines have a DE9P
> > for the serial port, it was because (a) 9 pins is enough for the active
> > signals on said port and (b) you can fit a DE and a DB on a single PC
> > bracket, so you could have a combined parallel/serial adapter card. Which
> > IBM introduced with the PC/AT IIRC.
> >
> > And Apple used the 8 pin mini-DIN on the Mac+ and later because there
> > wasn't room for the DE9 connector used on the earler Macs. Hardware
> > hackers have been complaining ever since -- those mini-DINs are about the
> > worst connectors in the world to wire!
> >
> > -tony
> >
>
>
Received on Wed Apr 11 2001 - 18:53:37 BST