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Re: What is NMI under Emulator?
- Subject: Re: What is NMI under Emulator?
- From: Jalapeno <jalapeno1@mac.com>
- Date: Mon, 04 Mar 2002 00:04:06 GMT
- Newsgroups: comp.sys.apple2
- Organization: Space Vacuum Consultants, LLPC.
- References: <Kzxg8.47236$nz4.4471935@bin4.nnrp.aus1.giganews.com>
- User-agent: MT-NewsWatcher/3.2 (PPC Mac OS X)
- Xref: archiver1.google.com comp.sys.apple2:17939
In article <Kzxg8.47236$nz4.4471935@bin4.nnrp.aus1.giganews.com>,
"Bryan Parkoff" <BParkoff@satx.rr.com> wrote:
> What is NMI under Emulator?
>
Most likely the same thing it is on a 65xx.
> I have noticed that several emulator projects include hardware
> manipulation such as IRQ and NMI. I know that IRQ is used to interrupt 6502
> CPU such as keyboard and I/O controller cards. What about NMI? Please
> advise.
>
> Yours Truly,
>
> Bryan Parkoff
> BParkoff@satx.rr.com
>
>
NMI is a REALLY high priority interupt that can't be disabled. It comes
in on a separate pin from IRQ'. NMI is mnemonic for Non-Maskable
Interrupt.