[A83] Re: Point of making your own lcd_busy?


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[A83] Re: Point of making your own lcd_busy?



On Saturday 08 February 2003 19:57, Patai Gergely wrote:
> > >It changes the data _at_ the SP, not SP itself.
> >
> > Indeed.  Even if an interrupt did go off between the statements, an
> > interrupt that wouldn't crash the calc anyway would point SP back
> > where it should be after.  So, unless there is an interrupt that
> > messes with non-shadow HL, its safe.
>
> That's what I realised myself about 0.1 sec after sending the mail.
> :)

Still, interrupts should be disabled, just not in 'busy' routine.



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