Re: Looking for a VHDL forum or individual help

From: Wolfram Sang <*wolfram_at_the-dreams.de*> Date: Mon, 23 Aug 2010 17:29:23 +0200 Message-ID: <4C7293D3.6080204@the-dreams.de> · wolfram_at_the-dreams.de

> level triggered. The docs state that the NMI in the 6502 is edge 
> triggered. He agreed with my findings. But so far it never caused 
> problems, so why changing it? I gave him an example where things 
> could go wrong. Anyway if the docs state edge triggered, why not 
> implementing it?

You can use the edge-triggered behaviour to "disable" the NMI on the c64.
See the article I wrote somewhen (and it _is_ used, in some demos at
least): http://www.the-dreams.de/articles/nmi-lock.txt

Regards,

   Ninja

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