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STA: Difference between revisions

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* [[Labiak]] page on STA: https://archive.org/details/Programming_the_65816/page/n194
* [[Labiak]] page on STA: https://archive.org/details/Programming_the_65816/page/n194
* [[MCS6500 Manual]] page on STA: https://archive.org/details/mos_microcomputers_programming_manual/page/n20
* [[MCS6500 Manual]] page on STA: https://archive.org/details/mos_microcomputers_programming_manual/page/n20
* [[Carr]] page on STA: https://archive.org/details/6502UsersManual/page/n286


[[Category:ASM]]
[[Category:ASM]]
[[Category:Group One Instructions]]
[[Category:Group One Instructions]]
[[Category:Inherited from 6502]]
[[Category:Inherited from 6502]]

Revision as of 04:38, 16 May 2023

STA (Store Accumulator) is a 65x instruction that stores the value of the accumulator.

Basic Info
Addressing Mode Opcode Length Speed
absolute 8D 3 bytes 4 cycles
absolute long 8F 4 bytes 5 cycles
direct page 85 2 bytes 3 cycles
direct page indirect 92 2 bytes 5 cycles
direct page indirect long 87 2 bytes 6 cycles
absolute indexed by X 9D 3 bytes 4 cycles
absolute long indexed by X 9F 4 bytes 5 cycles
absolute indexed by Y 99 3 bytes 4 cycles
direct page indexed by X 95 2 bytes 4 cycles
direct page indexed indirect by X 81 2 bytes 6 cycles
direct page indirect indexed by Y 91 2 bytes 5 cycles
direct page indirect long indexed by Y 97 2 bytes 6 cycles
stack relative 83 2 bytes 4 cycles
stack relative indirect indexed by Y 93 2 bytes 7 cycles
Flags Clobbered
N V M X D I Z C
. . . . . . . .

See Also

External Links