[stella] A possible use for indexed indirect addressing on the VCS.

[Dennis Debro]

Hi there,

> But it can be optimized to an overhead of 7 bytes like this:
>
> BRKvector:
> 	 plp             ; remove flags from stack (not needed with RTI)
>      tsx             ; load x with stackpointer
>   ;;   inx             ; x++ (not needed)
>      dec    $01,x    ; adjust return address to point at break-id
>      lda    ($01,x)  ; read break-id...
>      tay             ; ...and store in y
> Subroutine:
> 	; Do stuff
>      rts

Yep, this is the way it's done in Reactor.

Take care,
Dennis