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| From: TLC (all posts)
Date: 2001-07-24
Subject: Re: interrupt
|
Hi!,
>
> Mmm..... I guess your right... it doesn't matter which as theres only
> one "interrupt" thrown... however... If you service one, and return...
> does it cause another straight away? I think my emu would... what
> about the actual hardware....I'd "guess" yes...?
Yes it should do like that, as far as I'm concerned. The IRQ line remains asserted as long as there's at least one pending IRQ. Now,
whether the CPU actually fetches / executes one instruction from the main program after finishing the RTI command, or restarts the IRQ -
register-save/jump - sequence immediately is just another question, I don't know (but AFAIK it is discussed in the 64doc mentioned earlier).
L.
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