Re: [Amforth-devel] Hello, and a question about interrupts

[Matthias T. <mt...@we...>]

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Dave N6NZ schrieb:
>   This evening I have been looking at the interrupt system trying to
> understand it. In reading amforth.asm, I see where the current interrupt
> number is stored away in 'intcur' and then interrupts are re-enabled.
> It seems to me that there is a race with multiple simultaneous
> interrupts -- if a second interrupt comes in before the value of
> 'intcur' has been consumed it will be over written and the interrupt
> will have been lost to forth.  It seems to me like intcur should be a
> bit mask so that all pending interrupts could be represented, not a
> single interrupt number.  Is there something that I am missing?
You hit all points. The interrupt system has been designed to have
access to timer interrupts. Later I extended it to play with other
interrupt sources that sometimes work sometimes dont. To be
honest: I never had the need to implement interrupts beyond the
timers in forth, and now exists an assembler in amforth with
an PS/2 keyboard example so I'm open for suggestions and patches
but not very motivated to implement a new interrupt system myself ;=)

Cheers
Matthias

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