[comp.sys.tandy] ready only hard drive

nigel@isgtec.UUCP (Nigel Burnett) (11/28/90)

I'm posting this for a friend who has no net access:
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I moved a hard disk and its controller from an old tandy 1000 to a
tandy 1000SL. 
All seemed well at first;  I could boot 
from it, and look at or run anything that was already there,
but any attempt to write to the disk resulted in a 1 min pause,
then the message "not ready error writing drive".

The SL has a rom drive (normally drive c) and the cpu is an 8086.
The drive is a miniscribe 3650 on a western digital mfm xt controller.


thanks - Nigel 

garee@evax.arl.utexas.edu (Scott Garee) (11/30/90)

>I moved a hard disk and its controller from an old tandy 1000 to a
>tandy 1000SL. 

I was unable to reach you via EMAIL so I am posting the solution to the
net.  There are actually two ways to fix the problem.
The original 1000 used interrupt 5 for the video (same as the PCjr it
was made to compete with), but regular PC's use int 2.  The SL and all
other current 1000's now use int 5 for the HD.  The hard drive
is probably set to use int 2, so it needs to be switched to 5.
If the drive is a hard card you need to change the jumper on the long
vertical row on the right edge of the controller from 8 to 7 (or is it 7
to 8?, I'm at school so I don't have docs handy, so just reverse the
position of said jumper.)  Then change the jumper on the short
horizontal row on the lower right from 2-3 to 1-2 (same reversal rule
applies.)  This should fix the problem.
If the drive is a seperate drive/controller set do this:  The controlelr
has a jumper marked with the interrupt settings, change it, dealt with.
If you need more help you can call me or post another followup, I'll be
happy to give a hand.  Good luck!

+------------------------------------------------+
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