Re: LZ: Anyone (successfully) used the EXX command?

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Re: LZ: Anyone (successfully) used the EXX command?

barrym wrote:
> 
> On Mon, 23 Sep 1996, Mel Tsai wrote:
> 
> > What exactly happens when you disable interrupts?  I mean, can you
> > still use the link port?  I read in the Zshell archives somewhere
> > saying that you can't use interrupt driven sound or greyscale when you
> > disable interrupts...
> 
> You can't do much of anything except raw processing when
> you disable interrupts.  The usual practice is to disable
> interrupts in a routine only for the short time that you
> have to and then re-enable them.  Usually just for a few
> instructions.  I don't know how sensitive the 85 is to this
> but I doubt if you can read the keyboard or do much of
> anything else till they're re-enabled.
> 
> Barry


One important thing that doesn't work when you've disabled the interrupts
is GET_KEY, because I guess get key just fetches the byte at ($8001) and
that byte is stored there when an interrupt is called.


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