Getting hi and low byte of a label

[cgimenez]

Hi all,

Given

v8p:
.DB 2, 0

What is the right syntax to get the hi and low bytes of this label address ?

Is it

LDA #>v8p
LDA #<v8p

or

LDA >v8p
LDA <v8p

[vhelin]

Here are some pointers about this issue:

https://wla-dx.readthedocs.io/en/latest/arithmetics.html
https://wla-dx.readthedocs.io/en/latest/functions.html

If you are talking about 6502 then

LDA #>v8p

and

LDA >v8p

are different instructions. I'm guessing (I'm no 6502 programmer) that you want "LDA #>v8p"... I could be wrong, though. :)

[cgimenez]

Thanks for your reply (and yes I'm on the 6502 side, forgot to mention)

Yes I also guess that I want
LDA #>v8p

If v8p resolve to $2000
I want to LDA with #20

But what does
LDA >v8p
?

Have not coded for 8bit cpus for a very very very long time, so forgive me if I mismatch things ;-)

[vhelin]

I this here's the answer: https://wiki.cdot.senecacollege.ca/wiki/6502_Addressing_Modes

[vhelin]

So "LDA >v8p" -> "LDA $20" -> load accumulator from zero page address $20