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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
commit | f215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch) | |
tree | 6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /src/VBox/Devices/PC/BIOS/parallel.c | |
parent | Initial commit. (diff) | |
download | virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip |
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/VBox/Devices/PC/BIOS/parallel.c')
-rw-r--r-- | src/VBox/Devices/PC/BIOS/parallel.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/src/VBox/Devices/PC/BIOS/parallel.c b/src/VBox/Devices/PC/BIOS/parallel.c new file mode 100644 index 00000000..5a4cbe6b --- /dev/null +++ b/src/VBox/Devices/PC/BIOS/parallel.c @@ -0,0 +1,101 @@ +/* $Id: parallel.c $ */ +/** @file + * PC BIOS - ??? + */ + +/* + * Copyright (C) 2006-2023 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>. + * + * SPDX-License-Identifier: GPL-3.0-only + * -------------------------------------------------------------------- + * + * This code is based on: + * + * ROM BIOS for use with Bochs/Plex86/QEMU emulation environment + * + * Copyright (C) 2002 MandrakeSoft S.A. + * + * MandrakeSoft S.A. + * 43, rue d'Aboukir + * 75002 Paris - France + * http://www.linux-mandrake.com/ + * http://www.mandrakesoft.com/ + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + +/* + * Oracle LGPL Disclaimer: For the avoidance of doubt, except that if any license choice + * other than GPL or LGPL is available it will apply instead, Oracle elects to use only + * the Lesser General Public License version 2.1 (LGPLv2) at this time for any software where + * a choice of LGPL license versions is made available with the language indicating + * that LGPLv2 or any later version may be used, or where a choice of which version + * of the LGPL is applied is otherwise unspecified. + */ + + +#include <stdint.h> +#include "biosint.h" +#include "inlines.h" + +void BIOSCALL int17_function(pusha_regs_t regs, uint16_t es, uint16_t ds, volatile iret_addr_t iret_addr) +{ + uint16_t addr,timeout; + uint8_t val8; + + int_enable(); + + addr = read_word(0x0040, (regs.u.r16.dx << 1) + 8); + if ((regs.u.r8.ah < 3) && (regs.u.r16.dx < 3) && (addr > 0)) { + timeout = read_byte(0x0040, 0x0078 + regs.u.r16.dx) << 8; + if (regs.u.r8.ah == 0) { + outb(addr, regs.u.r8.al); + val8 = inb(addr+2); + outb(addr+2, val8 | 0x01); // send strobe + outb(addr+2, val8 & ~0x01); + while (((inb(addr+1) & 0x40) == 0x40) && (timeout)) { + timeout--; + } + } + if (regs.u.r8.ah == 1) { + val8 = inb(addr+2); + outb(addr+2, val8 & ~0x04); // send init + outb(addr+2, val8 | 0x04); + } + val8 = inb(addr+1); + regs.u.r8.ah = (val8 ^ 0x48); + if (!timeout) regs.u.r8.ah |= 0x01; + ClearCF(iret_addr.flags); + } else { + SetCF(iret_addr.flags); // Unsupported + } +} |