CODEWITHSUNDEEP
assemblydirective6502
Meow Mix
Meow Mix

Reputation: 165

.byte directive in 6502: Where it is stored

A duplicate may be put on this question, but the particular questions with the same concept as mine have not been answered in one single way.

The .byte directive stores bytes into ROM unused by instructions. (the several questions with similar topics as mine had answers stating this) I have not been sure how to access the data from the .byte code, so let me give you an example of 6502 code.

.byte $0F
label:
    LDA label - 1

Would this work? Anyways, my question is not where the .byte goes (ROM), but how to access it. For example, in the NES the cartridge is loaded to $8000, so if I were to have .byte data at the beginning of my program, would I access it by loading from $8000? And when loading the next 16 bytes I would load from $8010?

Thank you, and please do not mark this as a duplicate as no other question answers my question.

If tl;dr, then, How do you access the .byte data from ROM (in the NES)

Upvotes: 2

Views: 980

Answers (1)

Cactus
Cactus

Reputation: 27626

You can put a label on the .byte itself. For example, to load it into A, you could do

foo: 
    .byte $0F
    ; More stuff here
bar: 
    LDA foo

Upvotes: 3

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