Re: 5.25 drive destroying boot-blocks

[buggie@pegasus.unm.edu (stephen e buggie)]

Mail me the faulty board and I will de-solder the chip you specify, and 
replace it with a socket.  Cost:  Just return postage.

But be specific about which chip ----- I dont want to de-solder all of 
the chips!


Steve Buggie
200 College Rd.
Gallup NM 87301







Mitchell Spector (spec@vax2.concordia.ca) wrote:
:     I have a no-name 5.25 drive (seems to be a clone of the Disk II drive)
: which is not able to boot most disks. After playing with it for a short
: time, I discovered it was actually _destroying_ the boot blocks on any
: ProDOS or DOS 3.3 disk it came across. If you listen, uou can hear it 
: seek over the two tracks or so that it "eats" before going idle. :)

:     In anycase, I assume it's a faulty 74xxx chip on the analog board of
: the floppy drive (the controller works okay with one of my Disk II drives).
: I had a quick look inside, all the chips are soldered-in, expect one.
: Unfortunately the 74LS125 is soldered-in, and I would strongly guess this
: is the chip doing the damage. Am I correct, or would it be another? I
: didn't mark down what the one socketed chip is, but I'm sure I could
: salvage a working one to try in the meantime.

: Mitchell Spector
: spec@vax2.concordia.ca