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a7042ddbe4
Use wrappers to call the kernal in bank 15 instead of implementing kernal functionality within the cc65 libs (eats performance but is much smaller and simpler). Improved startup/shutdown code allows a return to the system bank without calling the BASIC cold start vector. git-svn-id: svn://svn.cc65.org/cc65/trunk@2793 b7a2c559-68d2-44c3-8de9-860c34a00d81
31 lines
410 B
ArmAsm
31 lines
410 B
ArmAsm
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; Ullrich von Bassewitz, 2003-12-20
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; int kbhit (void);
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;
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.export _kbhit
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.importzp sysp0
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.import return0, return1
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.include "cbm610.inc"
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.proc _kbhit
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ldx IndReg
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lda #$0F
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sta IndReg
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ldy #$D1 ; Number of keys in kbd buffer
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lda (sysp0),y
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stx IndReg
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bne L1
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jmp return0
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L1: jmp return1
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.endproc
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