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BBC Micro Elite

Keyboard: CTRL

Name: CTRL [View in context] Type: Subroutine Category: Keyboard Summary: Scan the keyboard to see if CTRL is currently pressed
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 DSK4 to scan the keyboard }