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⌂ ∞ Elite on the BBC Micro and NES

Keyboard: CTRL

[Elite-A, Docked]

       Name: CTRL                                                    [Show more]
       Type: Subroutine
   Category: Keyboard
    Summary: Scan the keyboard to see if CTRL is currently pressed

    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * EQSHP calls CTRL
             * TT102 calls CTRL
             * TT208 calls CTRL
             * TT219 calls CTRL
             * TT25 calls CTRL




 Returns:

   X                    X = %10000001 (i.e. 129 or -127) if CTRL is being
                        pressed

                        X = 1 if CTRL is not being pressed

   A                    Contains the same as X



.CTRL

 LDX #1                 \ Set X to the internal key number for CTRL and fall
                        \ through to DKS4 to scan the keyboard