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⌂ ∞ Elite on the BBC Micro and NES

Icon bar: BlankAllButtons

[NES version, Bank 3]

       Name: BlankAllButtons                                         [Show more]
       Type: Subroutine
   Category: Icon bar
    Summary: Blank all the buttons on the icon bar

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * ShowIconBar calls BlankAllButtons




.BlankAllButtons

 JSR DrawIconBar        ; Draw the icon bar into the nametable buffers for both
                        ; bitplanes
                        ;
                        ; This also sets the following variables, which we pass
                        ; to the following routines:
                        ;
                        ;   * SC(1 0) is the address of the nametable entries
                        ;     for the on-screen icon bar in nametable buffer 0
                        ;
                        ;   * SC2(1 0) is the address of the nametable entries
                        ;     for the on-screen icon bar in nametable buffer 1

 LDY #2                 ; Blank the first button on the icon bar
 JSR DrawBlankButton2x2

 LDY #4                 ; Blank the second button on the icon bar
 JSR DrawBlankButton3x2

 LDY #7                 ; Blank the third button on the icon bar
 JSR DrawBlankButton2x2

 LDY #9                 ; Blank the fourth button on the icon bar
 JSR DrawBlankButton3x2

 LDY #12                ; Blank the fifth button on the icon bar
 JSR DrawBlankButton2x2

 LDY #29                ; Blank the twelfth button on the icon bar
 JSR DrawBlankButton3x2