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• 20:30, 10 May 2022 NovaSquirrel talk contribs created page Using X as a pointer (Created page with "Because the 65c816's index registers can be 16-bit, they can hold a 16-bit address. For programs that already use 16-bit index registers for other reasons (such as accessing level data), this can sometimes create an optimization opportunity, allowing for the use of faster addressing modes and smaller code. {| class="wikitable" |+ Addressing mode comparison |- ! Instruction !! Bytes !! Cycles |- | <code>LDA directpage,x</code> || 2 || * 4 * + 1 (16-bit A) * + 1 (low by...")