Skip to content

Operand Syntax

Jump to bottom
Bob Frasure edited this page Jan 5, 2025 · 1 revision 
    Operand syntax
    -----------------------------------------------------------------------

    A        accumulator
    #i       immediate
    #i,<n    immediate and zero page                | TST/SMB/RMB
    #i,<n,X  immediate and zero page indexed by X   | TST
    #i,<n,r  immediate, zero page and relative      | BBS/BBR
    #i,n     immediate and absolute                 | TST
    #i,n,X   immediate and absolute indexed by X    | TST
    <n       zero page
    <n,X     zero page indexed by X
    <n,Y     zero page indexed by Y
    <n,r     zero page and relative                 | BBRi/BBSi
    [n]      indirect (*)
    [n,X]    indirect pre-indexed by X (*)
    [n],Y    indirect zero page post-indexed by Y
    r        relative                               | BRA/BSR/Bcc
    n        absolute
    n,X      absolute indexed by X
    n,Y      absolute indexed by Y
    n,n,n    source, destination, length            | TAI/TIA/TII/TIN/TDD

    (*) can be zero page or absolute
    Note: 'n' is a numeric value.
Clone this wiki locally