Re: KR9600-PRO for Apple II Europlus

[Michael J. Mahon <mjmahon@aol.com>]

yoannd <go.yoann@gmail.com> wrote:
> Hi all,
> 
>  I've an issue with my keyboard, the number between 3 and the rest of the
> first line does not work anymore. I suspect that come from the Keyboard
> Controller. I've found an IC KR9600-PRO for replacement. But when I plug
> it into the socket, the keyboard does not react as expected at all... I
> get "ZZZZ" when I press any key...
>  I've seen in the KR9600-PRO's Data book, there is a ROM inside it to
> make some translation.
> 
>  Do we need to program the "blank" KR9600-PRO" to work with an Apple II
> Europlus Keyboard? If yes, where could I find the ROM’s source?
> 
> Thanks for your help.
> Yoann

If only one key doesn't work, I'd be much more likely to suspect the key
switch than the encoder. 

This is easily tested by momentarily bridging the contacts of the
keyswitch--if it works like pressing the key, then the keyswitch is bad (or
more likely, needs cleaning). 

And, yes, the Apple encoder is a custom programmed part--with mask
programming. You need either an *exact* replacement (Apple part number) or
a new "emulation" of the original encoder. 

-michael - NadaNet 3.1 and AppleCrate II: http://home.comcast.net/~mjmahon