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Consider: LDA $00 loads a value from address $00 LDA $00,X might load from $00, or might not LDA ($00),Y dereferences $00 as a 16-bit pointer LDA ($00,X) dereferences a pointer, not necessarily from $00 When perusing the cross-reference list, it's useful to be able to tell whether an instruction is accessing the location, using it as a base address, or deferencing it as a pointer. We now show "ptr" in the list for pointer dereferences. (We already showed "idx" for indexed accesses.)