Subject: Re: [stella] Indirect indexed addressing From: Erik Mooney <erik@xxxxxxxxxx> Date: Mon, 26 Apr 2004 20:10:50 -0400 |
>> Is it true that indexed-indirect addressing as LDA ($nn),Y is limited >> to zero-page addressing? Seems that way, with DASM throwing an error >> if $nn > $FF. > >Sad but true, yes. Thanks for the confirmation. At least now I finally understand how SkipDraw works. I always thought LDA ($nn),Y was a 3-byte instruction - an opcode plus a 2-byte (16-bit) operand - and could never figure out how the BIT opcode skipped 3 bytes in the instruction stream. :) ---------------------------------------------------------------------------------------------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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