2021-02-11 00:41:16 +00:00
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( my default test file )
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:dev/r fff8 ( std read port )
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:dev/w fff9 ( std write port )
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2021-02-11 03:05:40 +00:00
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;x 2 ;y 2 ;color 1 ;alive 1
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2021-02-11 00:41:16 +00:00
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|0100 @RESET
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2021-02-13 21:21:05 +00:00
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#01 ,dev/w STR ( set dev/write to screen )
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#01 ,color STR ( set color )
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#0020 ,x STR2 ( set x-pos )
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#0030 ,y STR2 ( set y-pos )
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#01 ,alive STR ( set alive = true )
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2021-02-11 00:41:16 +00:00
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BRK
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|c000 @FRAME
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2021-02-13 21:21:05 +00:00
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,alive LDR #00 EQU BRK?
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#01 ,color LDR ,x LDR2 ,y LDR2 ,putpixel JSR
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2021-02-11 03:05:40 +00:00
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,move JSR
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2021-02-11 00:41:16 +00:00
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BRK
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@move
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2021-02-13 21:21:05 +00:00
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,x LDR2 #0001 ADD2 ,x STR2 ( incr x )
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,x LDR2 #0040 LTH2 RTS? ( if x > 60 )
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#0020 ,x STR2 ( x = 0x0020 )
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,y LDR2 #0001 ADD2 ,y STR2 ( incr y )
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,y LDR2 #0050 LTH2 RTS? ( y > 50 )
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#00 ,alive STR ( alive = 0 )
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2021-02-11 00:41:16 +00:00
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RTS
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@putpixel
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2021-02-13 16:38:23 +00:00
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IOW2 ( y short )
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IOW2 ( x short )
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2021-02-11 03:05:40 +00:00
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IOW ( color byte )
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IOW ( redraw byte )
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2021-02-11 00:41:16 +00:00
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RTS
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|d000 @ERROR BRK
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|FFFA .RESET .FRAME .ERROR
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