5-1/4' drive on modern PC

From: Kevin Handy <kth_at_srv.net>
Date: Sat Dec 11 15:12:09 2004

Tom Peters wrote:

>There was an attempt to "simplify" connection of multiple floppy drives
>(meaning TWO) at one time by adding a "twist" to the cable-- some
>conductors in the ribbon are cut out and reversed, which is a sort of
>"cable select" for floppy drives.
It was done on an obscure machine called the IBM PC.

If you open up a modern PC with two floppy drives, guess what
kind of cable you will see?

>I seem to recall in this case that one would jumper both drives as drive A
>in such a case, or as DS0.
You jumber them both as drive B (DS1).

Can you even find floppy drives any more that are not hard coded as drive B?

>Stupid idea. Use a straight thru floppy cable and jumper one for DS0 and
>one for DS1. We get it.
>If you intermingle the two drive select ideas you may have problems where
>both or niether drives light up and niether can read.
But if you become the de-facto standard, all the clone makers will copy
what you did. Both the good and bad ideas.

Two floppies and 640K are enough for anybody...
Received on Sat Dec 11 2004 - 15:12:09 GMT

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