Re: Drive disconnect switch for SX 64

Well, NC jumpers definitely make a single switch impractical and I hadn't 
considered soft changes; thanks, it was just a thought, and not a very good 
one ;-)

mike

----- Original Message ----- 
From: "Steve Gray" <sjgray@rogers.com>
To: <cbm-hackers@musoftware.de>
Sent: Tuesday, November 30, 2010 12:50 PM
Subject: Re: Drive disconnect switch for SX 64


Yes, the SX64 FDD board has two jumpers for device selection. You need to 
CUT
the connection(s) to change the device number to 9,10,or 11. Remember also, 
that
those jumpers are read when the drive is first powered on or reset. Even
changing those will not make the device invisible. You could send a command 
to
make the device say 31 which most software would probably not support. 
Depends
what you want to do.

Lets say one didn't want to fiddle with changing jumpers or sending commands 
to
the drive (or couldn't because you are in the middle of running a program), 
and
wanted to connect an internal uIEC drive as device 8 while at the same time
having the internal drive available. A simple switch routing the ATN line to 
the
proper drive would be a simple solution.

Steve




----- Original Message ----
> From: MikeS <dm561@torfree.net>
> To: cbm-hackers@musoftware.de
> Sent: Tue, November 30, 2010 12:29:18 PM
> Subject: Re: Drive disconnect switch for SX 64
>
> I don't know how the SX64 determines the drive number, but if it's the 
> usual
> either-of-two-jumpers what would happen if your drive select switch had a
> centre-off position that connected neither?
>
> m
> ----- Original Message ----- From: "Niklas Ramsberg"
><niklas.ramsberg@swipnet.se>
> To: <cbm-hackers@musoftware.de>
> Sent: Tuesday, November 30, 2010 5:24 AM
> Subject: Drive disconnect switch for SX 64
>
>
> Hej allihopa,
>
> I'm thinking of installing switches for disconnecting the internal
> disk drive and for changing the device number on the drive in my SX
> 64. The latter I know how to do but the former I don't. Is there a
> single line that can be switched out to make the drive invisible to
> the computer?
>
> /Niklas Ramsberg
> aka
> < .
> (:) Bacon
> < .
>
> Message was sent through the cbm-hackers mailing list
>
>
> Message was sent through the cbm-hackers mailing list
>

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