.WHITETEXT LDA #32 \ Send a #SETVDU19 32 command to the I/O processor to JSR DOVDU19 \ switch to the mode 1 palette for the title screen, \ which is yellow (colour 1), white (colour 2) and cyan \ (colour 3) LDA #RED \ Send a #SETCOL RED command to the I/O processor to JMP DOCOL \ switch to colour 2, which is white in the title \ screen, and return from the subroutine using a tail \ call
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Subroutine DOCOL (category: Text)
Set the text colour by sending a #SETCOL command to the I/O processor
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Subroutine DOVDU19 (category: Drawing the screen)
Change the mode 1 palette by sending a #SETVDU19 command to the I/O processor
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Configuration variable RED = %11110000
Four mode 1 pixels of colour 2 (red, magenta or white)