The CTRLmc subroutine - Elite on the BBC Micro and NES

       Name: CTRLmc                                                  [Show more]
       Type: Subroutine
   Category: Keyboard
    Summary: Scan the Master Compact 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:
             * hyp calls CTRLmc
             * TT18 calls CTRLmc


 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


IF _COMPACT

.CTRLmc

 LDA #1                 \ Set A to the internal key number for CTRL and fall
                        \ through to DKS4mc to scan the keyboard

ENDIF

Keyboard: CTRLmc

[BBC Master version]