[s1mp3-dev] Actions documents arrive

[Bluechip]

PLEASE CHANGE THE THREAD SUBJECT WHEN THE THREAD CHANGES

You can't mask a non-maskable interrupt ...LOL - take a soldering 
iron to the PCB :)

BC

At 19:06 09/06/2006, you wrote:


>I was wondering about NMI - non maskable interrupts
>
>Wladston Viana F Filho ha scritto:
>
> >
> >
> > On 6/9/06, *Jeroen Domburg* <jeroen at sprite.student.utwente.nl
> > <mailto:jeroen at sprite.student.utwente.nl>> wrote:
> >
> >     Could you do me a favour and look up the meaning of the Z80
> >     instruction
> >     'di'?
> >
> >
> >
> > From zilog manual. This manual is VERY good for people wishing to
> > learn Z80, imo.
> >
> > ----
> >
> > Operation: IFF $B"+(B 0
> >
> > Op Code: DI
> > (1 1 1 1 0 0 1 1) F3
> >
> > Description: DI disables the maskable interrupt by resetting the
> > interrupt enable flipflops
> > (IFF1 and IFF2). Note that this instruction disables the maskable
> > interrupt during its execution.
> >
> > M cycles: 1
> > T States: 4
> > 4MHz E.T.:1.00
> >
> > Condition Bits Affected: None
> >
> > Example: When the CPU executes the instruction DI the maskable
> > interrupt is
> > disabled until it is subsequently re-enabled by an EI instruction. The
> > CPU
> > does not respond to an Interrupt Request (INT) signal.
> >
> >
> >
> >
> > --
> > Wladston Viana Ferreira Filho
> > Belo Horizonte - MG, Brasil
> > Visit the project: s1mp3.org <http://s1mp3.org>
> >
> >------------------------------------------------------------------------
> >
> >_______________________________________________
> >s1mp3-dev mailing list
> >s1mp3-dev at s1mp3.org
> >http://s1mp3.org/mailman/listinfo/s1mp3-dev_s1mp3.org
> >
> >
>
>
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