In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Coriolis wrote:

Oh then that is a completely different story, I have very fast code for linear addressing. James has a copy of it here [url=http://www.sxlist.com/techref/scenix/lib/mem/sstack_sx.htm]http://www.sxlist.com/techref/scenix/lib/mem/sstack_sx.htm[/url]

In essence when you increment the pointer you do:

 	setb dptr.4			;SX28 bank wrapping adjustment


and decrementing is

 	jb   dptr.4, :noroll		;SX28 bank wrapping adjustment
                sub dptr, #16
:noroll    rest of code

 

dptr is the index (which must be placed in FSR before indirect access)

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