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+ ; Simple example C64 code
+ ;
+
+ cpu 6502
+
+ option codepage,cbm
+
+ option output-file,vic20.tap
+ option output-format,cbm-tap
+ option cbm-tap-start,start
+ option cbm-tap-system,vic20
+
+ org $1100
+
+main:
+ lda #0
+ clc
+loop:
+ sta 36879
+ adc #1
+ pha
+ jsr $ffe4
+ beq nokey
+ rts
+nokey:
+ pla
+ jmp loop
+
+start:
+ jmp main