slib.nc in 21-Jan-18-91

Will_D

I am trying to understand this bit of code from slib.nc:

(O101 sub program: safez)
O101
IF#516EQ0GOTO 0
IF#516EQ1GOTO 1
IF#516EQ2GOTO 2
IF#516EQ3GOTO 3
IF#516EQ4GOTO 4
IF#516EQ5GOTO 5
IF#516EQ6GOTO 6
IF#516EQ7GOTO 7
GOTO 30
N0 # 1 = 868
GOTO 10
N1 # 1 = 840
GOTO 10
N2 # 1 = 844
GOTO 10
N3 # 1 = 848
GOTO 10
N4 #1 = 852
GOTO 10
N5 # 1 = 856
GOTO 10
N6 #1 = 860
GOTO 10
N7 # 1 = 864
GOTO 10
N10 # 2 = # [# 1 + 2]
#5 = #582-#2
IF#5LT0GOTO 20
G00 Z # 582
N 20 # 3 = 0
M99


Where is N30 and what does this line do:
N 20 # 3 = 0