why does circle crash in basic
Thanks.
greeting
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A.REG= $030C
X.REG= $030D
Y.REG= $030E
C.REG= $030F
SETLFS = $FFBA
CHKOUT = $FFC9
CHKIN = $FFC6
CLRCHN = $FFCC
MCIOUT = $FEB1
MACPTR = $FF44
GRAPH.DRAW.OVAL=$FF35
R0L=$02
R0H=$03
R0=R0L
R1L=$04
R1H=$05
R1=R1L
R2L=$06
R2H=$07
R2=R2L
R3L=$08
R3H=$09
R3=R3L
R4L=$0A
R4H=$0B
R4=R4L
SCREEN $80
POKE R0L,200
POKE R0H,0
POKE R1L,200
POKE R1H,0
POKE R2L,50
POKE R2H,0
POKE R3L,50
POKE R3H,0
POKE C.REG,1
SYS GRAPH.DRAW.OVAL