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⌂ ∞ ▽ Elite on the BBC Micro and NES

Flight: MESS

[Elite-A, Docked]

       Name: MESS                                                    [Show more]
       Type: Subroutine
   Category: Flight
    Summary: Display an in-flight message

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * me2 calls MESS




 Display an in-flight message in capitals at the bottom of the space view,
 erasing any existing in-flight message first.



 Arguments:

   A                    The text token to be printed



.MESS

 LDX #0                 \ Set QQ17 = 0 to switch to ALL CAPS
 STX QQ17

 LDY #9                 \ Move the text cursor to column 9, row 22, at the
 STY XC                 \ bottom middle of the screen, and set Y = 22
 LDY #22
 STY YC

 CPX DLY                \ If the message delay in DLY is not zero, jump up to
 BNE me1                \ me1 to erase the current message first (whose token
                        \ number will be in MCH)

 STY DLY                \ Set the message delay in DLY to 22

 STA MCH                \ Set MCH to the token we are about to display

                        \ Fall through into mes9 to print the token in A