Re: A86: Re: turning off the calc
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Re: A86: Re: turning off the calc
Nope...
from Dan Eble's http://www.ticalc.org/pub/text/calcinfo/ti-ports.txt:
----------------------------------------------------------------------------
-
Port 3 : ON Status, LCD Power
----------------------------------------------------------------------------
-
Write
-----
XXX?....
Bit 3 = 1: turn LCD on
0: turn LCD off
Bit 2 = 1: do not mask timer interrupts (200Hz)
0: mask timer interrupts
Bit 1 = 1: set bit 1 LCD status (on)
0: clear bit 1 LCD status (off)
Bit 0 = 1: do not mask ON key interrupts
0: mask ON key interrupts
Note: Do not exit a program with bits 0 and 1 clear. The TI-85
freezes.
Read
----
0000....
Bit 3 = 1: ON not pressed
0: ON pressed now
Bit 2 = 1: Timer interrupt happened
0: timer interrupts hasn't happened
Bit 1 = 1: LCD is on
0: LCD is off
Bit 0 = 1: ON interrupt has happened
0: ON interrupt hasn't happened
>
> is port 3 the same thing when you read it as when you write to it?
>
> -josh
>
> On Tue, 25 May 1999 06:57:17 EDT TGaArdvark@aol.com writes:
> >
> >>> would masking the on interrupt stop the down-left bug
> >>> by any chance?
> >>
> >> Nope. And, if possible, it's just an all-around bad idea.
> >
> >(That aforementioned flag does not mask the ON interrupts,
> >but tells the OS whether the ON key has been pressed
> >since the flag was last checked.)
> >
>
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References: