Re: Universal grammar

Am Sat, 11 Nov 2006 17:45:32 +0800 schrieb LEE Sau Dan:

"Paul" == Paul J Kriha <paul.nospam.kriha@xxxxxxxxxxxxxxx> writes:

Paul> LEE Sau Dan <danlee@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in
Paul> message news:87y7qizuj9.fsf@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>> >>>>> "Hans" == Hans Aberg <haberg@xxxxxxxxxx> writes:
>>
>> >> These are two topics for a further discussion, but consider
>> >> that I really understand little of binary computers, you
>> might >> lose your nerves with me, trying to explain your math
>> prover to >> a computer moron of my caliber.
>>
Hans> Only you can improve your computer skills. Here is how a
Hans> computer works: At startup time, it gets a signal called an
Hans> "interrupt",
>> That's not a interrupt. That a _reset_ signal.

Paul> Which is just one of the hardware interrupts that can be
Paul> sent to a CPU.

That's a hardware _signal_, but usually not considered an interrupt:

1) RESET cannot be caught or masked.
2) INTERRUPT is caught, handled and then the system resumes from it.
RESET abruptly brings to the whole system to a "start" state and
never resumes from where it left off.
3) INTERRUPT is used by peripherals to catch the attention of the CPU,
asking CPU to do something for them quickly.
RESET is usually raised by operators (often human) to bring the
system to a "start" state.

Paul> Hans is absolutely correct. It's an interrupt, it's one of
Paul> the unmaskable hardware interrupts. Without it, the CPU
Paul> would start executing instructions from an unpredictable
Paul> address.

Reset or interrupt, it's for sure something that interrupts.

Joachim
.

Relevant Pages

  • Re: Universal grammar
    ... Paul> This is a software engineers vocabulary. ... Paul> reset and other h/w interrupts. ... Paul> between how a CPU reacts to signals on various interrupt ... Paul> hardware device interrupts cause the CPU interrupt whatever ...
    (sci.lang)
  • Re: Universal grammar
    ... Paul> This is a software engineers vocabulary. ... Paul> reset and other h/w interrupts. ... Paul> between how a CPU reacts to signals on various interrupt ... Paul> hardware device interrupts cause the CPU interrupt whatever ...
    (sci.lang)
  • Re: Universal grammar
    ... Of course the address of the actual interrupt ... Paul> vector MUST BE HARDWIRED in the CPU. ... While the reset signal is meant for: ...
    (sci.lang)
  • Re: Universal grammar
    ... RESET cannot be caught or masked. ... INTERRUPT is caught, handled and then the system resumes from it. ... INTERRUPT is used by peripherals to catch the attention of the CPU, ... Paul> Hans is absolutely correct. ...
    (sci.lang)
  • Re: Universal grammar
    ... Hans> Only you can improve your computer skills. ... Paul> Which is just one of the hardware interrupts that can be ... INTERRUPT is caught, handled and then the system resumes from it. ... INTERRUPT is used by peripherals to catch the attention of the CPU, ...
    (sci.lang)
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