We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS

Y Index Register

From SnesLab
Revision as of 02:17, 1 August 2024 by Xetheria (talk | contribs) (flow INY/DEY into sentence)
Jump to: navigation, search

The Y Index Register exists on 65x processors and often holds the current index when iterating over things. It can be incremented or decremented by one with INY or DEY, but there is no instruction to add or subtract more than one.

On the S-SMP it is always 8 bits wide. On the 65c816, it may be 8 or 16 bits wide.

Unlike the X index register, there are no instructions to transfer value of the stack pointer to/from Y.

See Also

Reference