Re: [stella] Why do we use the SEI instruction???

Subject: Re: [stella] Why do we use the SEI instruction???
From: Thomas Jentzsch <tjentzsch@xxxxxx>
Date: Mon, 4 Aug 2003 21:15:31 +0200
At Monday, August 4, 2003, 17:53, Manuel wrote:
> Which is wrong. BRK causes an NMI and is so totally disregarding the
> Interrupt-Flag.

No, BRK uses $xffe, which is the IRQ vector.

But you are right, you can not disable BRK by using CLI.


> Correct, but any SEI instruction would still be a wasted byte.

Yup and according to Kevin Horton ([stella] 03 Sep 2001) CLD is too.
:-)

Have fun!
Thomas                            
_______________________________________________________
Thomas Jentzsch         | *** Every bit is sacred ! ***
tjentzsch at web dot de |

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