; http://www.aspisys.com/asm11man.htm
org 0x100
data set $
assert data == 0x100
data1 setn data ; data1 could be modified
data2 next data, 2 ; data2 cannot be modified
data3 next data
assert data1 == 0x100
assert data2 == 0x101
assert data3 == 0x103
assert data == 0x104