I'm sorry, but what is four bytes in hex. for example I have memory and I need to jump 4 bytes ahead. what would I add. I know this seems trivial but I am having a hard time understanding

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JMP $FFD2

What is that? If it's ORA 00 (IOW, OR accumulator with the contents of address 00 in ZP), the next instruction might be a conditional branch around a four more bytes of instructions, for example a BNE which assembles to D0 04.

Many of the questions you're asking will be answered by reading any 6502 programming manual. There are many good ones available, and any of them will get you more satisfaction from the whole 6502 experience. If you don't read any of them, I expect you will probably continue asking super basic questions and not make much progress. I like to recommend WDC's "Programming the 65816 including the 6502, 65C02, and 65802," available free online. It's big, but relatively easy reading, and you don't have to read the whole thing, as you can quit when it gets into the 16-bit stuff and then much of the rest is reference, where you look stuff up after you've got the basics down.

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http://WilsonMinesCo.com/ lots of 6502 resources
The "second front page" is http://wilsonminesco.com/links.html .
What's an additional VIA among friends, anyhow?

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x86?  We ain't got no x86.  We don't NEED no stinking x86!

Yeah, for someone who has "written operating systems" for the x86, these scattered questions seem a little strange. Would it help to have a sticky "Newbie Corner" somewhere, to encourage discussion of basic theory without polluting all of the other threads?

Mike

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Got a kilobyte lying fallow in your 65xx's memory map? Sprinkle some VTL02C on it and see how it grows on you!

Mike B. (about me) (learning how to github)