Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!ucsd!ucbvax!GRIN1.BITNET!THROOP
From: THROOP@GRIN1.BITNET ("Throop,Henry B")
Newsgroups: comp.sys.apple2
Subject: Re: One finger cotrol sequences
Message-ID: <9012201552.AA00588@apple.com>
Date: 20 Dec 90 15:51:10 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 29

[Dave Whitney about reading control key on gs]

For the record, the keyboard register is at $C025 on the gs.  It is
not available on pre-gs //s.

Bit     Meaning
7       Open-Apple pressed
6       Option pressed
5       Modifier key latch updated
4       Numeric keypad key pressed
3       Key held down
2       Caps lock down
1       Control pressed
0       Shift pressed

This register is updated whenever the status of a key has changed;
it is not held until read and reset, for example.

Note that the Open-Apple and Option keys can also be detected by reading
bit 7 of $C061 and $C062 on pre-gs machines; they correspond to the button
inputs from the joystick.

Henry

(A few people asked me about my Mandelbrot program I mentioned earlier.
I'll post it on c.s.a2 when I get back home and can post, in a couple of
days.)

@sig.