A quick update on my Apple III. I used the BNK, ADR and Exp/Got info from
the Apple III RAM test to narrow down the bad RAM chip. I replaced it with
one from an Apple II and it worked. The RAM test completes successfully,
but it does do one odd thing shown in this pic...
http://i.imgur.com/VP98h.jpg
Row 7 gets dashes across it during the second pass and all subsequent
passes. The test, however, continues normally. I ran it over 10 passes
with no problems. Any ideas what the dashes mean?
On the downside, my III still doesn't boot. It does pretty much what it did
before. WIth an SOS disk in the drive, it spins for about 3 seconds, then
nothing. The demo disk does the same thing. The III+ diagnostic disk that
used to boot, doesn't boot anymore and fails with an IO error message.
This makes me think again that there may be a floppy drive issue. Is the
drive calibration method that was mentioned previously the one that is
outlined in the Sun Remarketing Do It Yourself Guide for adjusting Apple
III drive speed...that uses a 60 Hz light source? If so, I guess that's my
next task to try to revive this machine.
Thanks,
Win