| 1 | ; $Id: bs3-cmn-KbdWait.asm 82968 2020-02-04 10:35:17Z vboxsync $
|
|---|
| 2 | ;; @file
|
|---|
| 3 | ; BS3Kit - Bs3KbdWait.
|
|---|
| 4 | ;
|
|---|
| 5 |
|
|---|
| 6 | ;
|
|---|
| 7 | ; Copyright (C) 2007-2020 Oracle Corporation
|
|---|
| 8 | ;
|
|---|
| 9 | ; This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | ; available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | ; you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | ; General Public License (GPL) as published by the Free Software
|
|---|
| 13 | ; Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | ; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | ; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | ;
|
|---|
| 17 | ; The contents of this file may alternatively be used under the terms
|
|---|
| 18 | ; of the Common Development and Distribution License Version 1.0
|
|---|
| 19 | ; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
|
|---|
| 20 | ; VirtualBox OSE distribution, in which case the provisions of the
|
|---|
| 21 | ; CDDL are applicable instead of those of the GPL.
|
|---|
| 22 | ;
|
|---|
| 23 | ; You may elect to license modified versions of this file under the
|
|---|
| 24 | ; terms and conditions of either the GPL or the CDDL or both.
|
|---|
| 25 | ;
|
|---|
| 26 |
|
|---|
| 27 | %include "bs3kit-template-header.mac"
|
|---|
| 28 |
|
|---|
| 29 | ;;
|
|---|
| 30 | ; Waits for the keyboard controller to become ready.
|
|---|
| 31 | ;
|
|---|
| 32 | ; @cproto BS3_DECL(void) Bs3KbdWait_c16(void);
|
|---|
| 33 | ;
|
|---|
| 34 | BS3_PROC_BEGIN_CMN Bs3KbdWait, BS3_PBC_HYBRID_0_ARGS
|
|---|
| 35 | push xBP
|
|---|
| 36 | mov xBP, xSP
|
|---|
| 37 | push xAX
|
|---|
| 38 |
|
|---|
| 39 | .check_status:
|
|---|
| 40 | in al, 64h
|
|---|
| 41 | test al, 1 ; KBD_STAT_OBF
|
|---|
| 42 | jnz .read_data_and_status
|
|---|
| 43 | test al, 2 ; KBD_STAT_IBF
|
|---|
| 44 | jnz .check_status
|
|---|
| 45 |
|
|---|
| 46 | pop xAX
|
|---|
| 47 | pop xBP
|
|---|
| 48 | BS3_HYBRID_RET
|
|---|
| 49 |
|
|---|
| 50 | .read_data_and_status:
|
|---|
| 51 | in al, 60h
|
|---|
| 52 | jmp .check_status
|
|---|
| 53 | BS3_PROC_END_CMN Bs3KbdWait
|
|---|
| 54 |
|
|---|
