Re: TransWarp GS repair questions

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

Conrad <conrad.russo@gmail.com> wrote:
> Hi Michael,
> 
> Well I guess you're right, I must have really been lucky! Thanks for the
> heads up! I am actually curious about something since you have brought it
> up. If pushing an apple key at the same time the corresponding pushbutton
> is pressed causes a short to ground, and NadaNet uses the pushbutton
> lines as communication lines, how can you safely use the apple keys on an
> AppleCrate or any NadaNet machine?

Good question!  The answer is that I was wrong. ;-)

Both the joystick buttons and the Apple keys (and NadaNet) pull the
pushbutton inputs high. 

The button/key combination that creates a short is PB3 and the SHIFT key,
if the shift key modification is installed (as it is by default on rev C
and later //e boards). 

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