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26784: Request and set the input method (keyboard, joystick, Int2)
Used by the routine at 64073.
26784 LD HL,26836 26836: 'CONTROL KEYS - Normal/Kempston/Cursor/Int2?'
26787 CALL 45032 Print this message
26790 LD HL,23611 This is the system variable FLAGS
26793 RES 5,(HL) Signal: no key pressed yet
26795 CALL 26429 Wait for a keypress and collect its ASCII code in A
26798 JR Z,26795
26800 LD HL,26764 Point HL at the keypress table for keys 0-9 when Int2 is not selected
26803 LD BC,10 There are 10 entries in this table
26806 CP 110 Was 'n' pressed?
26808 JR Z,26823 Jump if so
26810 CP 99 Was 'c' pressed?
26812 JR Z,26823 Jump if so
26814 CP 107 Was 'k' pressed?
26816 JR Z,26824 Jump if so
26818 CP 105 Was 'i' pressed?
26820 JR NZ,26790 Jump back to collect another keypress if not
26822 ADD HL,BC HL=26774 if 'i' was pressed
26823 XOR A Set A to 0 unless 'k' was pressed
26824 LD DE,26672 Copy 10 bytes from 26764 or 26774 to 26672 (the keypress table entries for keys 0-9)
26827 LDIR
26829 LD L,31 HL=26655
26831 LD (HL),A Store 107 ('k' for Kempston) or 0 here as appropriate
26832 LD HL,20480 Prepare HL for drawing the catwalk
26835 RET
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