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A '''Page''' in the 65x architecture is 256 bytes. | A '''Page''' in the 65x architecture is 256 contiguous bytes. | ||
A '''page boundary''' occurs between byte $FF of one page and byte $00 of the next. In [[emulation mode]], crossing a page boundary incurs a one cycle penalty. | A '''page boundary''' occurs between byte $FF of one page and byte $00 of the next. In [[emulation mode]], crossing a page boundary incurs a one cycle penalty. | ||
The [[zeropage]] is located at $00:0000. | |||
Most pages begin at an address of the form $xx:yy00, where xx is the bank number and yy is the page number, but the [[direct page]] can begin anywhere in [[bank]] zero. | |||
[[CGRAM]] and [[lowoam]] are exactly two pages. | |||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:Official Jargon]] | [[Category:Official Jargon]] | ||
Latest revision as of 07:44, 21 September 2024
A Page in the 65x architecture is 256 contiguous bytes.
A page boundary occurs between byte $FF of one page and byte $00 of the next. In emulation mode, crossing a page boundary incurs a one cycle penalty.
The zeropage is located at $00:0000.
Most pages begin at an address of the form $xx:yy00, where xx is the bank number and yy is the page number, but the direct page can begin anywhere in bank zero.