uxn/examples/hello.usm

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( hello world, to console )
:dev/w fff9 ( const write port )
;i 1 ( var iterator )
|0100 @RESET
#00 ,dev/w STR ( set dev/write to console )
@word1 "hello_world ( len: 0x0b )
@loop
IOW ( write to device#0 )
,i LDR #01 ADD ,i STR ( increment itr )
,i LDR ( a = i )
,word1 ,strlen JSR ( b = string length )
NEQ ,loop ROT JSR? POP^ ( a != b ? loop )
BRK
@strlen #0001 ADD2 LDR RTS
|c000 @FRAME BRK
|d000 @ERROR BRK
|FFFA .RESET .FRAME .ERROR