Post by Matthew Power Post by Michael J. Mahon
A Disk ][ Controller does not have a ROM compatible with the NSC, but a
3.5" controller usually does. The slot must be set to "slow" using the Zip
Chip configuration utility.
My 5.25 controller card does not have a compatible ROM as you said. I'm
quite hesitant to try it on any other cards because back when I first
posted this thread, I tried the only other matching chip I could find: on
my Super Serial Card. No clock, and after returning back to original the
Super Serial Card was dead. Those are cheap enough on ebay, and after
getting a new SSC my ImageWriter II would only print out 00 00 00 00 00 00 on and on...
After much thrashing about it turned out that the cable from the SSC to
the ImageWriter II also had some sort of internal damage. Replacing the
cable restored my A2e back to pre-experiment.
I'm sure someone will laugh at my ineptitude and that's ok... I also see
that it's dumb-funny :-)
But I'm really hesitant about moving that NSC around now...
Since you've determined that the problem was not the result of moving the
ROM, you can be confident that trying another location is safe.
Just take care to discharge any static charge on your body by touching the
power supply case, and be careful when removing and inserting chips into
Don't worry--that's why they're socketed. ;-)
Post by Matthew Power
Oh, I almost forgot.. that same NSC? Back in it's original location on
the motherboard and working fine... Unless I have a Zip Chip installed, lol.
And there's a good chance you can have both working!
BTW, for it to have a chance of working under the SSC ROM, you'll need to
set the slot the SSC is in to "slow" in the Zip Chip configuration utility.
-michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com