Atari XL

210 The Atari XL Handbook
NOTE Finds location of next byte to
be
accessed from disk.
ON N GOSUB Program branches to Nth
subroutine in list. If N is
larger than number of items
in list no branch occurs.
ChapterS
ON N GOTO Program branches to Nth
destination in list. If N
larger than number of items
in list no branch occurs.
ChapterS
OPEN #N,O,O,D
OR
PEEK (LOC)
PLOTX,Y
Opens a channel N to a
peri pheral device specified by
D.
Chapter 16
Logical operator. Returns
value TRUE if either or both
operands are true. Thus:
A = B OR C
A is true ifB or C is true.
Chapter 9
Gi ves the con ten ts of memory
location LOC.
Chapter 15
Puts point or character on
screen at location X,Y.
Chapter 13