[Coco] Re: Undocumented opcode $3E

Arthur Flexser flexser at fiu.edu
Mon Jan 26 13:37:23 EST 2004


On Mon, 26 Jan 2004, Torsten Dittel wrote:

> Already found that one:
> 
> $3E     Inherent    RESET - Jumps to the reset handler.
>                     - Stacks all registers, without setting the E-bit
>                       in CC.
>                     - Then sets the F and I interrupt masks
>                     - Then jumps to the reset handler.
>                     Unlike a hardware reset, the NMI is not 
>                     masked until the first load of SP.
> 
> 
> Any further details, comments?
> 

A comment is that it doesn't work with a 6309;  you get vectored to the
illegal opcode handler.

Art





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