[Coco] FD502 drive information
Bruce W. Calkins
brucewcalkins at charter.net
Mon Apr 2 16:40:13 EDT 2012
That is fairly close to my recollections Steve. In most cases the
terminating resistors are close to the drive select block next to the card
However to further confuse things, many 3.5" drives and a few late 5.25"
drives had permanently mounted resisters of a lower value that were supposed
to work with similar resisters in all of the drives.
----- Original Message -----
From: "Steve Batson"
> It's hard to say exactly since it's been a very long time and I don't have
> one of these drives handy to look at, however....The terminating resistors
> that I've worked with usually look like a chip and often times are not
> black, they may be a yellowish / orange color, but don't hold me to that
> any color is possible. Also, on most drives that they used them on, they
> were typically in a socket so you can pop them right out or install them
> needed. Some looked like a chip with pins on both sides and some had pins
> in just one side and stuck up in the air when plugged in. Another thing
> about them, they aren't always a perfectly flat/squared off package, they
> often look like something was molded over what's in side. On a floppy
> drive, they are most likely the only device in a socket, but again don't
> hold me to that. Finally, some drives don't have obvious terminating
> resistors, so in that case, the termination might be done internally when
> jumpers or whatever is used for the drive selection is set. The best thing
> you can do is find a manual for the exact drive model you have and see
> what's mentioned in there.
> From: "Bill"
> Where is the terminating resistor on a FD-502 drive? I've got two that I
> cannot make work, regardless of what I try. The gentleman I got them from
> was using them then they started giving him problems, so he gave them to
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