Keyboard: EnableKeyboard

       Name: EnableKeyboard                                          [Show more]
       Type: Subroutine
   Category: Keyboard
    Summary: Select the keyboard as the input stream and flush the keyboard
             buffer
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * ReadKeyboard calls EnableKeyboard
             * ReadNumber calls EnableKeyboard


.EnableKeyboard

 LDA #2                 \ Call OSBYTE with A = 2 and X = 0 to select the
 LDX #0                 \ keyboard as the input stream and disable the RS423
 JSR OSBYTE

 LDX #0                 \ Set X = 0 to denote the keyboard buffer

 JMP FlushBuffer        \ Call FlushBuffer to flush the keyboard buffer and
                        \ return from the subroutine using a tail call