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In the 6502/6510 architecture, a page of memory is 256 consecutive bytes (1/4 of a kilobyte) whose addresses range from $xx00 through $xxFF. The 6502/6510 can directly address 256 pages of memory.

The first page of memory is called the zero page and has the absolute addresses $0000-$00FF. The last page of memory as the absolute address $FF00-$FFFF.