Routines
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26426: Get the ASCII code of the last key pressed
Used by the routines at 46824, 47080, 62771, 62938 and 63352. Returns with the zero flag set if no key of interest was pressed. Otherwise returns with A holding the ASCII code of the last key pressed.
26426 CALL 26584 Get input from the Kempston joystick if it's in use
This entry point is used by the routines at 26784 and 64073.
26429 BIT 5,(HL) Check bit 5 of 23611, which will be set if a key was pressed; reset bit 5 afterwards
26431 RES 5,(HL)
26433 RET Z Return with the zero flag set if no key was pressed
26434 LD A,(23560) Get the code of the last key pressed
26437 CP 13 Was it ENTER?
26439 JR Z,26445 Jump if so
26441 CP 32 Return with the zero flag reset if the last key pressed had an ASCII code between 32 and 127 inclusive (or it was ENTER)
26443 JR C,26448
26445 CP 128
26447 RET C
26448 XOR A Set the zero flag to indicate that no key of interest was pressed
The address of this entry point appears in the table of keypress handling routines at 26624. It is called from the main loop at 26471 whenever a non-game key is pressed.
26449 RET
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