Bugbyter

["vladitx" <vladitx@nucleusys.com>]

I remember this was a great tool in only (IIRC) 28 sectors, but can't
find it in Asimov. Anyone still having it or knowing the author in
person?

This is from google:

1) Ted Cohn has been a long-time Mac enthusiast and used to be an
Apple ][ hacker. He wrote a professional 6502 debugger for the Apple ]
[ called Bugbyter which Apple sold with its ProDOS assembly package.

2) APPLE EDASM: This was Apple's original "official" assembler for the
II Plus and later 8-bit Apple II's. Though no longer actively
supported (ORCA/M having supplanted it in the APW environment), the
early versions for DOS 3.3 were included on the Apple Toolkit disk,
which also had a hi-res character generator that could be interfaced
into Applesoft programs. The early ProDOS versions of EDASM were sold
with a 65c02 debugger called Bugbyter.