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; $Id$
;; @file
; BS3Kit - Bs3KbdWait.
;
;
; Copyright (C) 2007-2019 Oracle Corporation
;
; This file is part of VirtualBox Open Source Edition (OSE), as
; available from http://www.virtualbox.org. This file is free software;
; you can redistribute it and/or modify it under the terms of the GNU
; General Public License (GPL) as published by the Free Software
; Foundation, in version 2 as it comes in the "COPYING" file of the
; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
;
; The contents of this file may alternatively be used under the terms
; of the Common Development and Distribution License Version 1.0
; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
; VirtualBox OSE distribution, in which case the provisions of the
; CDDL are applicable instead of those of the GPL.
;
; You may elect to license modified versions of this file under the
; terms and conditions of either the GPL or the CDDL or both.
;
%include "bs3kit-template-header.mac"
;;
; Waits for the keyboard controller to become ready.
;
; @cproto BS3_DECL(void) Bs3KbdWait_c16(void);
;
BS3_PROC_BEGIN_CMN Bs3KbdWait, BS3_PBC_HYBRID_0_ARGS
push xBP
mov xBP, xSP
push xAX
.check_status:
in al, 64h
test al, 1 ; KBD_STAT_OBF
jnz .read_data_and_status
test al, 2 ; KBD_STAT_IBF
jnz .check_status
pop xAX
pop xBP
BS3_HYBRID_RET
.read_data_and_status:
in al, 60h
jmp .check_status
BS3_PROC_END_CMN Bs3KbdWait
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