.286
.model small
.code
start:
;--- case 1: the third lbl1 definition is the CURRENT definition
;--- when the jmp is assembled
jmp lbl1
lbl1 = $
db 1,2,3
lbl1 = $
db 1,2,3
lbl1 = $
;--- case 2: the first lbl2 definition is the CURRENT definition
;--- when the jmp is assembled
lbl2 = $
jmp lbl2
lbl2 = $
db 1,2,3
lbl2 = $
db 1,2,3
lbl2 = $
end start