Dashboard: msblob

       Name: msblob                                                  [Show more]
       Type: Subroutine
   Category: Dashboard
    Summary: Display the dashboard's missile indicators in black or grey
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * SOS1 calls msblob
             * TT66 calls msblob


 Display the dashboard's missile indicators, with all the missiles reset to
 black (i.e. not armed or locked), or grey if there is no missile.


.msblob

 LDX #4                 ; Set up a loop counter in X to count through all four
                        ; missile indicators

.ss

 CPX NOMSL              ; If the counter is equal to the number of missiles,
 BEQ SAL8               ; jump down to SAL8 to draw the remaining missiles, as
                        ; the rest of them are present and should be drawn in
                        ; black

 LDY #133               ; Set the pattern for the missile indicator at position
 JSR MSBAR              ; X to 133, which is the same grey as the dashboard,
                        ; so this effectively hides the indicator

 DEX                    ; Decrement the counter to point to the next missile

 BNE ss                 ; Loop back to ss if we still have missiles to draw

 RTS                    ; Return from the subroutine

.SAL8

 LDY #108               ; Set the pattern for the missile indicator at position
 JSR MSBAR              ; X to 108, which is a black indicator

 DEX                    ; Decrement the counter to point to the next missile

 BNE SAL8               ; Loop back to SAL8 if we still have missiles to draw

 RTS                    ; Return from the subroutine