; nrjasm standard library starts here

; custom macros always take 3 values, usually cell addresses (referred to as %A, %B and %C) and defined between .def and .end (no nesting allowed)
; custom macros are always expanded before the elementary macros
; if %C is not passed, it is replaced with NXT
; if %B and/or %A is not passed, it is replaced with HLT

.def .lbl ; define labels
  .var %A FREE ; allocate a variable with the name in %A, then set it to the next instruciton address:
  .set @%A NXT ; %A is directly substituted as text, so we can use it after the dereferencing operator
.end

; define a reusable buffer variable for our following macros
.var setbuf FREE ; we don't care which address it will actually be

.def MOV ; transfer one cell to another, usage: MOV dst src
  @setbuf HLT NXT ; first, zero out the setbuf variable by performing NOR with 0xFFFF
  %A HLT NXT ; then, zero out the destination cell by performing NOR with 0xFFFF
  @setbuf %B NXT ; then, set setbuf variable to the inverted source value
  %A @setbuf %C ; finally, set destination cell to the inverted setbuf value ( = source value)
.end