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[/] [or1k_old/] [trunk/] [newlib/] [newlib/] [libc/] [sys/] [go32/] [kbhit.s] - Blame information for rev 1782

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1 39 lampret
/* This is file KBHIT.S */
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/*
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** Copyright (C) 1993 DJ Delorie, 24 Kirsten Ave, Rochester NH 03867-2954
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**
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** This file is distributed under the terms listed in the document
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** "copying.dj", available from DJ Delorie at the address above.
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** A copy of "copying.dj" should accompany this file; if not, a copy
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** should be available from where this file was obtained.  This file
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** may not be distributed without a verbatim copy of "copying.dj".
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**
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** This file is distributed WITHOUT ANY WARRANTY; without even the implied
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** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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        .globl  _kbhit
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_kbhit:
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        pushl   %ebp
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        movl    %esp,%ebp
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        pushl   %ebx
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        pushl   %esi
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        pushl   %edi
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try_again:
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        movl    $0x41a,%eax
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        call    dosmemsetup
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        movzwl  %gs:(%eax),%ebx
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        movzwl  %gs:2(%eax),%ecx
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        cmp     %ebx,%ecx
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        je      key_not_hit
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        movb    $0x11,%ah
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        int     $0x16
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        jz      key_not_hit
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        cmp     $0,%eax
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        jne     key_hit
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        movb    $0x10,%ah
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        int     $0x16
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        jmp     try_again
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key_not_hit:
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        movl    $0,%eax
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        jmp     L1
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key_hit:
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        movl    $1,%eax
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L1:
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        popl    %edi
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        popl    %esi
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        popl    %ebx
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        leave
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        ret

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