Path: utzoo!attcan!uunet!decwrl!ucbvax!pro-harvest.cts.com!crew
From: crew@pro-harvest.cts.com (Chris Wicklein)
Newsgroups: comp.sys.apple2
Subject: Keyboard interrupts
Message-ID: <9164.apple.net.info-apple@pro-harvest>
Date: 24 Jun 90 18:38:18 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 19


   I was talking to somebody about how to handle keyboard interrupts to create
"DA's for 8-bit IIs". I have a possible solution.

  When a key is pressed on an Apple //c an IRQ is generated by the 6551
running the second serial port. The //c can then optionally place the keycode
in a buffer. Why not install in IRQ handeler that checks for, say the pressing
of OA-D (for desk accessories) by waiting for a 'd' or 'D' then checking the
paddle. This might just work.
  
  The IIgs has a similar opt. key buffer, so it might function in a similar
manner. The above details are sketchy, and may not be technically correct, but
they're a start.

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