[A83] IXIY
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[A83] IXIY
In several recent messages, there has been talk of the index registers IX
and IY. I know that ionputsprite uses IX as the address, and the set and
res statements for changing flags use the IY register as a base address,
but I have no idea as to what makes these registers special, as in why
ionputsprite doesn't use hl, and as to how the value in IY is always
predictable, in that it can be used as a base address for those flags, even
though many people have code that modifies it.
-Gavin Olson