Re: Interface Board, 3.5 Drive

["Roger Johnstone" <rojaws@mac.com>]

----------
In article <Pine.GSO.4.10.10101251953430.21718-100000@access.mbnet.mb.ca>,
Dennis Fenton <defenton@MBnet.MB.CA> wrote:

> I just came across a small board made by Sony (thier # 1-619-250-15) but
> marketed directly by Apple (Apple # 076-0234). The box says, INTFC,DAISY
> CHAIN, 3.5 DR.

It's a daisy chain board for inside the Apple 3.5 Drive, the type used with
the IIgs.

> It has a female DB-19 connector, a short strip of ribbon
> cable attached to a female 20 pin connector, and a male 20 pin connector
> on the board.

The D19 socket pokes out the back of the drive case and provides a daisy
chain socket for a second drive. The ribbon connector plugs into the disk
drive and the pin header connects to a drive cable with a D19 plug on the
other end.

> There are also a red two pin male connector and a white two
> pin one marked cn104 and cn 105.

Those are for the eject button and the activity LED.

> There is a hole for a mounting screw I
> assume but it does not use a slot. The letters KBX and IF-89 are painted
> on it.
>
> Can anyone tell me what it is for and how it is connected please?

It sounds like a board sold as a service spare. The Mac and Apple IIgs used
the same drive mechanism, but the Mac version of the drive didn't have a
daisy chain board (since it always had one drive built in).

> I'm
> hoping that it provides a way to connect a 3.5" drive to a IIe.
>
> Thanks,
> Dennis

The only real use for it is to replace a stuffed daisy chain board in an
Apple 3.5 Drive (it's the most common part to go pfhtt!). And the only way
to use one of these drives on a IIe is with the SuperDrive controller card (
which is rare and expensive).

--
Roger Johnstone, Invercargill, New Zealand

Apple II - Future Cop:LAPD - Warcraft II
http://homepage.mac.com/rojaws
______________________________________________________________________

"That's the thing about people who think they hate computers. What they
really hate is lousy programmers."
Larry Niven and Jerry Pournelle, "Oath of Fealty"