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X Index Register: Difference between revisions
From SnesLab
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=== See Also === | === See Also === | ||
* [[INX]] | |||
* [[DEX]] | |||
* [[LDX]] | * [[LDX]] | ||
* [[STX]] | * [[STX]] | ||
Revision as of 09:45, 14 December 2023
The X Index Register exists on 65x processors and often holds the current index when iterating over things.
On the S-SMP it is always 8 bits wide. On the 65c816, it may be 8 or 16 bits wide.
Unlike the Y index register, the value of the stack pointer can be transferred to/from X. See TXS and TSX.