Learning 6502 / 65816

[xxphillips]

Hi everyone I want to start a Thread to help people who don't know much about asm like myself but really want to learn. I've been trying to learn snes asm for awhile now but I don't feel like I'm getting any where so I was thinking to myself what would I need to do to understand snes asm a lot more the answer to read more and ask a lot of question about some of the 256 opcodes. So I'm going to start asking. If anyone has any suggestions please say.

AND address hex value 2D

How might this be used in asm?

so if we say

123030A9 LDA #const Load the Accumulator
12303103 with 03
1230328D STA Store the Accumulator
123033F2 At address
123034E1 7EE1F2
1230352D AND address
123036F8 7EE1F8
123037E1

I'm not sure how you would use AND. Would it make both addresses become 03? if not Please can some one explain how to use it.

[Pyriel]

Accumulator AND (value at address) -> accumulator.

For op code 29, it's just "accumulator AND memory". The result is stored in the accumulator, so there's no "both addresses" about it. Going by your sort-of-code there, it'd be 3 AND (0x7EE1F8). If 0x7EE1F8 had the value 6, the accumulator would contain 2 after the operation, and 0x7EE1F8 would still be 6.

[dlevere]

Here's a list of tutorials that I found

http://dlevere1.proboards.com/thread...torial-dabhand

http://dlevere1.proboards.com/thread...t-asm-hack-nop

http://dlevere1.proboards.com/thread...king-tutorials

http://dlevere1.proboards.com/thread...ame-genie-tips

http://dlevere1.proboards.com/thread...ke-genie-codes

http://dlevere1.proboards.com/thread...t-visitntx-nes

http://dlevere1.proboards.com/thread...cking-nes-lisp

http://dlevere1.proboards.com/thread...6502-processor

http://dlevere1.proboards.com/thread...me-genie-codes