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uxn/examples/test.usm
2021-02-10 11:59:26 -08:00

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( my default test file )
:dev/r fff8 ( std read port )
:dev/w fff9 ( std write port )
;i ;x0 ;x1 ;y0 ;y1
|0100 @RESET
,01 ,dev/w STR ( set dev/write screen#01 )
BRK
|c000 @FRAME
,i LDR ,01 ADD ,i STR ( incr i )
,i LDR ,x1 STR ( set x )
,01 ,02 ,x0 LDR^ ,y0 LDR^ ,putpixel JSR
BRK
@onrow
,y1 LDR ,01 ADD ,y1 STR
RTS
@putpixel
IOW^ ( y short )
IOW^ ( x short )
IOW ( color byte )
IOW ( redraw byte )
RTS
|d000 @ERROR BRK
|FFFA .RESET .FRAME .ERROR