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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,01 ,dev/w STR ( set dev/write to screen )
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,01 ,color STR ( set color )
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,0020 ,x STR^ ( set x-pos )
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,0030 ,y STR^ ( set y-pos )
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2021-02-11 03:05:40 +00:00
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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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2021-02-11 03:05:40 +00:00
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,alive LDR ,00 EQU BRK?
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2021-02-11 00:41:16 +00:00
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,01 ,color LDR ,x LDR^ ,y LDR^ ,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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,x LDR^ ,0001 ADD^ ,x STR^ ( incr x )
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2021-02-11 03:05:40 +00:00
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,x LDR^ ,0040 LTH^ RTS? ( if x > 60 )
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2021-02-11 00:41:16 +00:00
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,0020 ,x STR^ ( x = 0x0020 )
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,y LDR^ ,0001 ADD^ ,y STR^ ( incr y )
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2021-02-11 03:05:40 +00:00
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,y LDR^ ,0050 LTH^ 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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IOW^ ( y short )
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IOW^ ( 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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