Date   : Mon, 26 Apr 2004 19:06:51 +0100 (BST)
From   : Tom Walker <tommowalker@...>
Subject: Re: Analogue Port Fire Buttons

> The "fire" buttons are in fact connected to the slow
> peripheral bus, aka 
> the VIA-A. If you're planning to do a low-level
> implementation, then 
> you'll find that while getting info out of the ADC
> is easy enoug, 
> getting your accesses right with the VIA is a little
> harder. You need to 
> disable interrupts, set the B side to the right
> address, and take a look 
> at the A side, get the data you want, then clear
> interrupts again.

Nope! The fire buttons are just connected to port B
bits 4 and 5. I don't even think interrupts need to be
disabled.

Tom 


       
       
               
____________________________________________________________
Yahoo! Messenger - Communicate instantly..."Ping" 
your friends today! Download Messenger Now 
http://uk.messenger.yahoo.com/download/index.html