2 May
2006
2 May
'06
10:50 p.m.
Hi Fred and all
Yes, I meant 34. I've been fiddling with a laptop drive
and it has the 26 pin z connector and that number stuck
out in my head.
Also, 34 was the answer. I put a piece of tape on pin
34 of the 360K drive and all seems well now. It seems
like the 1.44M use that line for detecting the 720k
disk while the 360K used it for disk change. I just
couldn't recall what line was involved.
For the rest, I checked it with and without termination.
It is twisted cable and it was selected as ds1. Everything
was correct and the boot procedure execised the
head steps fine for both drive. It just errored on the
1.44M when I tried to access it. The 360K worked fine.
The 1.44M would work as soon as I'd disconnect the
edge connector from the 360K ( I did this hot but
it is only signal wires so I don't think it could hurt anything ).
Interesting problem for future reference.
Thanks
Dwight
From: Fred Cisin <cisin at xenosoft.com>
On Tue, 2 May 2006, dwight elvey wrote:
OK and I can use the 360K disk fine but I
can't use the\
1.44M while the 360K is connected. If I remove the
26 pin connector, the 1.44 works fine.
^^ ????? Do you mean 34?
What signal is most likely the problem from the
old
360K that is stepping on the 1.44M?
straight or twisted cable? termination?
I'm using this setup to transfer images for
my Olivetti
M20 so it is somewhat on topic.