[A83] Re: ON-button influence
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[A83] Re: ON-button influence
If you disable interrupts, you will not be able to use _getcsc. _getkey just
turns interrupts back on anyhow. _getcsc should not be affected by ON.
_getkey will return 0 if on is pressed (it is the only way this happens).
However, if 0 is returned from _getkey you still have to reset the flag.
-----Original Message-----
From: assembly-83-bounce@lists.ticalc.org
[mailto:assembly-83-bounce@lists.ticalc.org]On Behalf Of Nick Reichert
Sent: Monday, July 23, 2001 1:32 PM
To: assembly-83@lists.ticalc.org
Subject: [A83] Re: ON-button influence
Another way to fix your problem would be to disable interrupts with
di
and then, before your program quits, enable interrupts with
ei
Also, I believe that _getkey (and maybe _getcsc) are affected by the "on"
button.
Hope that helps,
Nicholas Reichert
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Subject: [A83] ON-button influence
Date: Fri, 20 Jul 2001 16:41:46 +0200
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OK, this is the case.
As one of my first programs I have made a very simple security program
that will shut the TI-83 off if the wrong access code is given.
This ofcourse will mean that the ON-button must be pushed to turn
the calculator back on.
The problem is that when you then enter the right access code and the
calculator returns to the TI-OS a ERR:BREAK error is given, just like when
you push ON with BASIC programme's.
Can somebody tell me how to stop the influence of the ON-button so that the
error message won't show up ???
I know a few other programme'a who do this, so it must be possible, thanks.
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