Re: ProDos Disk Images

[lee@lcremeans.homeip.net (Lee Cremeans)]

"Bryan Villados" <news002@macgeek.org> wrote in message news:<VO5X9.49586$X7.17942730@twister.socal.rr.com>...
> Very interesting! Is there anyone out there that's running the Apple IIe
> emulation card on a Macintosh Quadra 605 or LC 475, Performa 475, or
> Performa 476? All of these models (could be more but I can't remember them)
> have the LC PDS slot that can host the emulation card, but it also has the
> manual eject drive that's of discussion here. I wonder now if the issue
> about the disk controller chip would cause problems with these machines and
> the IIe card? Upgrading an LC using one of these logic board may not be a
> good upgrade afterall.

I have a LC 475 here with the manual-inject Sony drive (which, lucky
me, came with the 33 MHz mod and a full 68040); when I first got the
machine, it could read and write ProDOS 800k floppies just fine. Also,
my Power Mac 7600 (which also has the Sony manual-inject drive) could
do it as well, though sometimes I had to write Disk Copy images twice
to get things going.

One thing I have noticed about the Sonys is that they seem really
fragile; now that I've had both Macs for a while and subjected them to
varying amounts of abuse, I can't use the drives out of either machine
to write disks that will work on any other, because the alignments on
the heads have mysteriously slipped (and I don't have the equipment to
realign them). They'll format, read and write any disk just fine...the
resulting disk just won't work in any other drive (except maybe an
LS-120 if it's formatted for 720k/1.4 MB MFM, since LS-120 drives are
linear voice coil, but I haven't tried that yet). I'm wondering if
this fragility is what causes the problems people have noticed.

Some Power Macs use Mitsubishi manual-inject drives instead of the
Sonys; I wonder if they're any sturdier.

-lee