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cc65/libsrc/cbm610/kbhit.s
cuz 97494bc1f3 Design change: Do keyboard polling internally without calling the kernal
in the system bank. For one this performs better (several %), second it
allows to handle the function keys in conformance with other platforms.
Without the custom keyboard routine, we would have to apply some more
magic to the function keys to make them work as with other cc65 targets.


git-svn-id: svn://svn.cc65.org/cc65/trunk@2811 b7a2c559-68d2-44c3-8de9-860c34a00d81
2003-12-21 18:43:25 +00:00

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ArmAsm

;
; Ullrich von Bassewitz, 06.08.1998
;
; int kbhit (void);
;
.export _kbhit
.import return0, return1
.import keyidx: zp
.proc _kbhit
lda keyidx ; Get number of characters
bne L1
jmp return0
L1: jmp return1
.endproc