Atari XL User Manual

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The Atari XL Handbook
X=XNEW:Y=YNEW
FOR T=l TO 10:NEXT T
GOTO CHECKJOY
REM SCREEN
X=X*4+2:Y=79
POKE
PLOT X,Y
RETURN
REM SWITCH
IF X<7 THEN COL=O:GOSUB
MESSAGE:GOSUB CHCURSOR:RETURN
IF X>8 AND X<15 THEN COL=l:
GOSUB MESSAGE:GOSUB CHCURSOR:
RETURN
IF X>16 AND X<23 THEN COL=2:
GOSUB MESSAGE:GOSUB CHCURSOR:
RETURN
IF X>24 AND X<31 THEN COL=3:
GOSUB MESSAGE:GOSUB CHCURSOR:
RETURN
IF X>32 AND X<38 AND Y=1 THEN
POP:COL=2:GOTO PICTURE
RETURN
REM CHCURSOR
POKE 656,Y
POKE 657,X
POKE 752,0
;
RETURN
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REM MESSAGE
POKE 752,1
POKE 82,0
PRINT" " "
PRINT" ERASE
BLUE CLEAR"
RED
YELLOW

Atari XL Specifications

General

Release Year	1983
CPU	MOS Technology 6502C
Graphics	ANTIC, GTIA
Sound	POKEY (4 channels)
Storage	Cassette tape
Ports	Cartridge
Operating System	Atari BASIC
CPU Speed	1.79 MHz
RAM	64 KB