Missions: SPMASK

       Name: SPMASK                                                  [Show more]
       Type: Variable
   Category: Missions
    Summary: Masks for updating sprite bits in VIC+$10 for the top bit of the
             9-bit x-coordinates of the Trumble sprites
    Context: See this variable in context in the source code
 References: This variable is used as follows:
             * MVTRIBS uses SPMASK


.SPMASK

 EQUB %11111011         ; Mask for clearing the VIC+$10 bit for sprite 2
                        ; (Trumble 0)

 EQUB %00000100         ; Mask for setting the VIC+$10 bit for sprite 2
                        ; (Trumble 0)

 EQUB %11110111         ; Mask for clearing the VIC+$10 bit for sprite 3
                        ; (Trumble 1)

 EQUB %00001000         ; Mask for setting the VIC+$10 bit for sprite 3
                        ; (Trumble 1)

 EQUB %11101111         ; Mask for clearing the VIC+$10 bit for sprite 4
                        ; (Trumble 2)

 EQUB %00010000         ; Mask for setting the VIC+$10 bit for sprite 4
                        ; (Trumble 2)

 EQUB %11011111         ; Mask for clearing the VIC+$10 bit for sprite 5
                        ; (Trumble 3)

 EQUB %00100000         ; Mask for setting the VIC+$10 bit for sprite 5
                        ; (Trumble 3)

 EQUB %10111111         ; Mask for clearing the VIC+$10 bit for sprite 6
                        ; (Trumble 4)

 EQUB %01000000         ; Mask for setting the VIC+$10 bit for sprite 6
                        ; (Trumble 4)

 EQUB %01111111         ; Mask for clearing the VIC+$10 bit for sprite 7
                        ; (Trumble 5)

 EQUB %10000000         ; Mask for setting the VIC+$10 bit for sprite 7
                        ; (Trumble 5)