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/* This is file GETKEY.S */

/*

** Copyright (C) 1993 DJ Delorie

**

** This file is distributed under the terms listed in the document

** "copying.dj".

** A copy of "copying.dj" should accompany this file; if not, a copy

** should be available from where this file was obtained.  This file

** may not be distributed without a verbatim copy of "copying.dj".

**

** This file is distributed WITHOUT ANY WARRANTY; without even the implied

** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Modified by J. Alan Eldridge, Liberty Brokerage, 77 Water St, NYC 10005

Changed handling of characters starting with 0xE0:

        Now calls interrupt 16, function 10

        if leading byte was 0x00, ah = 0x01

        if leading byte was 0xE0, ah = 0x02

        The main function is now called getxkey()...

        getkey is provided to maintain compatibility with

        already written software

*/

        .globl  _getxkey

_getxkey:

        pushl   %ebx

        pushl   %esi

        pushl   %edi

        movb    $0x10,%ah

        int     $0x16

        mov     $1,%bl

        cmpb    $0,%al

        je      L0

        cmpb    $0xE0,%al

        jne     L1

        inc     %bl

L0:

        movb    %ah,%al

        movb    %bl,%ah

        jmp     L2

L1:

        movb    $0,%ah

L2:

        andl    $0xffff,%eax

        popl    %edi

        popl    %esi

        popl    %ebx

        ret

        .globl  _getkey

_getkey:

        call    _getxkey

        testb   $0x02,%ah

        jz      L3

        movb    $0x01,%ah

L3:

        ret