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Diffstat (limited to '')
-rw-r--r-- | src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-KbdWait.asm | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-KbdWait.asm b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-KbdWait.asm new file mode 100644 index 00000000..e63fcb99 --- /dev/null +++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-KbdWait.asm @@ -0,0 +1,64 @@ +; $Id: bs3-cmn-KbdWait.asm $ +;; @file +; BS3Kit - Bs3KbdWait. +; + +; +; Copyright (C) 2007-2023 Oracle and/or its affiliates. +; +; This file is part of VirtualBox base platform packages, as +; available from https://www.virtualbox.org. +; +; This program is free software; you can redistribute it and/or +; modify it under the terms of the GNU General Public License +; as published by the Free Software Foundation, in version 3 of the +; License. +; +; This program is distributed in the hope that it will be useful, but +; WITHOUT ANY WARRANTY; without even the implied warranty of +; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +; General Public License for more details. +; +; You should have received a copy of the GNU General Public License +; along with this program; if not, see <https://www.gnu.org/licenses>. +; +; The contents of this file may alternatively be used under the terms +; of the Common Development and Distribution License Version 1.0 +; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included +; in the VirtualBox 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. +; +; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 +; + +%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 + |