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

cybergoth@xxxxxxxx wrote:

BRK is an NMI, basta!


It may be non-maskable, but it doesn't use the
NMI Vector ($fffa/$fffb) - it uses $fffe/$ffff.

From the MCS6500 Microcomputer Family Programming
Manual (p.144) :

"Symbolic notation for break is
PC + 2 (down arrow) (FFFE)->PCL (FFFF)->PCH"
--
Robin Harbron - macbeth@xxxxxxxxxxx
   http://my.tbaytel.net/macbeth
        http://www.psw.ca/

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Aw: Re: [stella] Why do we use the SEI instruction??? cybergoth - Mon, 4 Aug 2003 11:53:06 -0400 (EDT) Thomas Jentzsch - Mon, 4 Aug 2003 15:19:27 -0400 (EDT) <Possible follow-ups> cybergoth - Mon, 4 Aug 2003 15:37:17 -0400 (EDT) Robin Harbron - Mon, 4 Aug 2003 16:00:27 -0400 (EDT) <=

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