C128D drive change solution!!
lxm...@ritvax.isc.rit.edu
Larry here again....
Well, I got a few responses for my drive question. (Thank you for all who
responded) They all consisted of "try the software method." Oh well.
The main reason I wanted to change my drive number was to play an occasional
game (free time? what's that?). A lot of my games are heavily copyprotected,
and my 1571 is not in perfect alignment. (I align it myself to save money, and
can't quite get it exact enough.) Needless to say, the software method just
doesn't cut it. So, hoping for some inspiration, I once again opened up the
ol' 128 to have a look-see. While looking around, I came across a pair of
unlabeled jumpers. (hmmm... a pair of jumpers in the midst of the drive
innards... hmmm....) So, being the brave/bold/dangerous/(stupid?) person I am,
I decided after much pondering to cut one. After I cut it, I turned things on,
and found that the internal drive did *not* try to boot up. (is this good or
bad?). Sure enough, it didn't respond to #8. I tried accessing #9, to no
avail. I began worrying, and hesitantly tried #10. Bingo!! My drive
thought it was device #10!! With renewed vigor, I re-patched the jumper and
cut the other one. You guessed it.... #9! So, for any one out there that is
interested, here is the official unofficial hardware method to change the drive
number of the internal drive:
(don't sue me if anything goes wrong... mine worked out just fine!)
BTW, this will invalidate your warranty, etc. etc. etc.
Take the cover off the 128D. (a logical first step.) Find where the drive
connects to the board (a set of 3 sockets running front to back). This will
give you the general vicinity of the jumpers. Now, look for chip #U106 on the
board. This is slightly beneath the drive, but you should be able to see it
fairly clearly. Just to the left of this chip, that is, in the direction of
the sockets, there will be 2 unlabeled jumpers. Cut the front jumper to change
the drive # to 9, the back jumper to change the drive to 10, and both to change
the drive to 11. That's it! I'm surprised this info wasn't more widely
available. It's really a fairly simple procedure.
Well, I hope this info is of help to some others out there......
till next time,
-Larry
William F. Hagen
Now all you have to do is get some
totally useless microswitches and
put them in some completey inaccessible
and rediculous place
and it will be just like a cbm job.
Robert Andrew Knop
>Take the cover off the 128D....
>Just to the left of this chip, that is, in the direction of
>the sockets, there will be 2 unlabeled jumpers. Cut the front jumper to change
>the drive # to 9, the back jumper to change the drive to 10, and both to
>change the drive to 11.
Curious: what do these actual jumpers look like? I have done the "cut the
jumper" method to change a 1541 to Device 9 (and then later installed a 8/9
switch), and the jumpers there were two metal half circles on the printed
circuit board separated by about 1 mm with a very thin bridge between them.
Too bad C= didn't use switches, or those little "pull" jumper thingies like
are found in the Aprotek-C24 modem!
-Rob Knop
rk...@tybalt.caltech.edu
Charles Jones
>are found in the Aprotek-C24 modem!
I have a Aprotek C24 modem....what does changing the jumper settings do??
lxm...@ritvax.isc.rit.edu
These jumpers look identical to the 1541 jumpers (small semi-circles connected
with a thin bridge).
I agree C= sould have used pull-pumpers.... But then that would have been too
easy and practical for the users! :)
-Larry
Miguel Pedro (Hiv 91)
>Too bad C= didn't use switches, or those little "pull" jumper thingies like
>are found in the Aprotek-C24 modem!
I have a Aprotek C24 modem....what does changing the jumper settings do??
It is used to select between Hayes or 1670 compatibility. If I remember
correctly, Hayes mode is selected when the jumper is not removed.
--
Miguel Pedro
flat...@info.polymtl.ca
Jim Waleke
Changes it between a 1670 modem and a 100% Hayes Compatible Modem. My
Enhancer 2000 disk drive (1541 Compatible) had the pull jumpers to change the
device numbers.
Andrew W Hamilton
I agree completely! I must have reached around to the back of my 1581 a
couple hundred times with a little screwdriver to blindly try and switch
the drive number. Lately I've found it's easier to just softwire the
number using the File Utilities section of Super Snapshot. Is there a way
to wire in a better switch (i. e., a larger one, with settings I don't need
to look up in the manual -- "Is device 9 one up and the other down, or is
it the opposite?" :))?
J. P. Grenert
hami...@brahms.udel.edu