Re: A2 Rev 0 Recreation Update #2

[Mike Willegal <mike@willegal.net>]

Take a look at this image from my website.

http://www.willegal.net/appleii/images/rev0clone-front.jpg

The most obvious difference is the prototype area from A-11 to A-14, 
which is greatly reduced in later revs in order to supply room for the 
chips required to make the improvements mentioned elsewhere.

By the time rev3 or rev 4 came out, there were a great many subtle
differences in trace placement throughout the board.

Another related question I have for the group.  Does anyone have a rev 1 
or rev 2 board?  My rev 3 is copyrighted 1978, and I know Apple was 
still producing rev 0's well into spring of 1978, so the run of rev1 or 
rev2's must have been pretty short.

Regards,
Mike Willegal

Note the moved

Steven Hirsch wrote:
> Mike Willegal wrote:
>
> > Hi Folks,
> >
> >   I put some preliminary information on my site about availablity and 
> > cost of kits.  Goto the apple II recreation page for more information.
>
>
> Mike,
>
> What precisely is the difference between a Rev 0 board and its 
> successors? How does one identify it?  You mention something on your web 
> site about "a transistor at <some coordinates>", but the grid 
> coordinates don't correspond to anything obvious screened on the 
> motherboard itself.  Is there a secret decoder ring somewhere?  I have a 
> very early Apple ][ and am trying to figure out if has a Rev 0 board 
> installed.