Re: Apple II+ revisions

[dempson@actrix.gen.nz (David Empson)]

W Stewart <waynes@intergate.bc.ca> wrote:

> There were at least 2 other boards made.

I don't know what the A/B/C/D suffix relates to, but I've heard Apple ][
and ][+ logic boards described in terms of a revision number, with
"revision 7" being the baseline version for the Apple ][+ (eliminating
support for the 4K RAM chips, for example, and always having all three
rows populated).

It seems likely that the 820-0044-C and -D are later than the revision 7
board.

Does anyone have Jim Sather's "Understanding the Apple II" book (from
Quality Software)?  There may be an appendix which lists the motherboard
revisions.

I have the IIe version of this book, which doesn't say much about the
earlier machines, but it is the sort of information that might be
included in the earlier edition.

-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand