Re: Z80 Card for Apple //e

[Patrick Schaefer <pa.schaefer@web.de>]

Bill Buckels schrieb:

> ... but since this one says it is new I may 
> get lucky.

Don't expect it to work from the beginning. Bill's design has a very 
critical timing, therefore most clones need some tweaking. Be prepared 
to swap the 74LS367 against parts from another manufacturer. Besides 
that, there are three RC delay lines that may or may not be fitted.

Many years ago a friend of mine and I each bought a Softcard clone. None 
of them worked. He brought his card to me because we wanted to send them 
back. I tested it in my Apple II clone -- and it worked!. I gave him 
mine, he put it into his computer -- it worked too!. So just swapping 
the cards fixed two systems.

A few years later I encountered the same situation with 486 PCs and Vesa 
Local Bus controllers.


Patrick