Drawing the screen: zebop

       Name: zebop                                                   [Show more]
       Type: Variable
   Category: Drawing the screen
    Summary: The value for VIC register $18 to set the screen RAM address for a
             raster count of 0 in the interrupt routine (i.e. the space view)
  Deep dive: The split-screen mode in Commodore 64 Elite
             Colouring the Commodore 64 bitmap screen
    Context: See this variable in context in the source code
 References: This variable is used as follows:
             * COMIRQ1 uses zebop


.zebop

 EQUB $81               ; Determines the address of screen RAM to use for colour
                        ; data in the upper portion of the screen (this sets the
                        ; address of screen RAM to $6000 and does not change)