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⌂ ∞ Aviator on the BBC Micro

Graphics: SetColourToWhite

       Name: SetColourToWhite                                        [Show more]
       Type: Subroutine
   Category: Graphics
    Summary: Set a logical colour to white

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * DrawCanopyView calls SetColourToWhite
             * ResetLineLists calls SetColourToWhite




 Arguments:

   X                    The logical colour to set to white



.SetColourToWhite

 LDY #7                 \ Set Y = 7 so we set the logical colour to physical
                        \ colour 7 (white)

 BNE SetLogicalColour   \ Jump to SetLogicalColour to set the logical colour in
                        \ X to white (this BNE is effectively a JMP as Y is
                        \ never zero