10base2 / 10baseT (again)

From: Douglas Quebbeman <dhquebbeman_at_theestopinalgroup.com>
Date: Tue Nov 28 13:01:18 2000

> > Well, I'd posit that Apple _set_ standards instead of following them.
> >
> > For example, Apple's use of a DB-25 for a SCSI port and the pinout
> > they chose has been copied widely throughout the industry.
>
> Try to plug in a device with the Future Domain pinout. I don't know
> which came first, I just know that they are incompatible to the point
> of releasing the majic smoke.

How strange! I have a Future Domain SCSI card (850-MEX?) that uses
exactly the Apple pinout, and even carries a sticker on the rear
bezel stating same!

> > More conventionally, the serial ports follow normal pinouts, even
> > though they're electrically RS-422 instead of RS-232C.
>
> The "normal pinouts" were defined by Apple. Other systems used different
> pinouts on the same Mini-DIN connector (Epson PX-8, for example).

As Tony caught, I had been referring to the DB-9 serial ports on the
128k, 512k, and 512ke Macs. I started early...

regards,
-dq
Received on Tue Nov 28 2000 - 13:01:18 GMT