Like literally everything I know about computers and electronics, I learned
about D-sub designations from my street-hacker approach to learning: get
your hands on it and play. Since that's how Radio Shack and my electronics
catalogs referred to that style of connector, that's what I learned to call
them, too. That argues very strongly that the "common usage" theory of DB-x
nomenclature is correct.
Also, you're exactly right about Centronics connectors. I know what those
are immediately. "Amphenol" took me a few seconds to recall. :)
Michael and David, you've both posted what is, to me, very interesting
information. Thanks for the knowledge.
Of course, this does nothing to change the fact that the NEC Multisync 2A is
a good monitor choice for the IIgs. ;)
And now for my final annoyance... I'm a top-poster!
Speakin' through the Love Filter,
Le Scrounge Weasl
> >The letter after the "D"
> >refers to the physical size of the connector.
> >Assuming two rows of pins with the usual spacing and staggered
> >arrangement, the common connectors defined by the relevant DIN standard
> >DA15 (Mac/IIgs/IIc video connector, AUI port for Ethernet, PC joystick)
> >DB25 (serial or parallel port, Mac/A2 SCSI port)
> >DE9 (IIe/IIc/IIgs joystick, IIc/IIe/Mac mouse, PC serial port)
> >There are also DC and DD prefixes, which are for larger connectors which
> >I haven't come across in the realm of personal computers. I forget the
> >exact number of pins, but one of them is about 37 pins in two rows, and
> >the other is about 50 pins in three rows (with the same pin spacing as
> >the others, so the connector is taller).
> >The 19 pin connector used for the floppy drive on the IIe/IIc/IIgs/Mac
> >is one which falls outside the originally designated types, so it
> >doesn't have an official second letter. I use "D-19".
> David, what you have written is absolutely correct (as usual!), but I
> think that the nomenclature of "D" series connectors has now become
> a matter of common usage rather than original intent. Sometimes
> the inventor loses control of the invention!
> High-density D connectors are now universally tagged as "high density"
> eliminating any possible confusion with the older variety. And the older
> D connectors are uniquely specified by the number of pins. The result
> is that the suffix after the "D" has become redundant and all such
> connectors are now commonly denominated as "DBxx", after the most
> common one, the DB25.
> This is somewhat analogous to the use of the "Centronix" designation
> for a 34-pin Blue Ribbon connector, or, by extension "x-pin Centronix"
> for any Blue Ribbon connector at all! (Particularly strange, since they
> are Amphenol designs, and Centronix only popularized them on their
> I think it will be harder to change this than to get people to stop
> calling all * tissues Kleenex. ;-) And, since there is no chance
> of confusion, why bother? (Though the original "intended" nomenclature
> of D-series connectors makes a great trivia question! ;-)
> Home page: http://www.veryComputer.com/