A86: Re: Re: Maskable Interrupts
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A86: Re: Re: Maskable Interrupts
not quite, kid. what halt does is stop CPU operation until an interrupt
occurs, so if you had the interrupts enabled, the calc would turn back in
less than 1/200 of a second ... it waits for on key to be pressed instead to
be turned back on, since that is also an interrupt.
when it comes to having clock on the 86, i think, bluntly, that kirk is
wrong. he's over looking the fact that you could use _alt_off to write your
own shut down routine that turns off the LCD and loops over a check of the
bit in that port (i forget which one :P) keeping the interrupts enabled.
also, if you had the conviction, you could write a routine to adjust the
clock for battery power.
>
>No, from my knowledge (and Kirk Meyer's too ;-) ) maskable interrupts do
not
>run while the calc is off. He explained this in the recent ticalc.org
>newsletter. I think David Phillips has also come to the conclusion that
>they don't. Because of 'halt'. It stops the interrupts and goes into low
>power mode. I am pretty sure this is essentially what happens when the
calc
>turns off.
>_________
>JBrett
>tbarwick@esn.net
>ICQ UIN: 20607010
>AIM: BarwickBJ
>http://ww2.esn.net/~tbarwick
>Plexus Publishing member
>ACZ member
>
>
>>
>>Does anyone know if the TI-86 shuts off maskable interrupts
>>when off? I know we've discussed this a billion times before,
>>but we've never come to a consensus (to my knowledge) and
>>I don't think anyone's actually bothered to test it for themselves.
>>Basically I'm asking if the 1/200s interrupts occur when the
>>calc is off. I've heard both yes and no (as well as a bunch of
>>dunno's and don't care's) from people who usually know what
>>they are talking about. As I remember, the last time we dis-
>>cussed it, we seemed to be leaning toward yes, the 1/200s
>>interrupts do occur when the calc is off.
>>
>