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diff --git a/src/VBox/Devices/PC/BIOS/keyboard.c b/src/VBox/Devices/PC/BIOS/keyboard.c
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+/* $Id: keyboard.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 "inlines.h"
+#include "biosint.h"
+
+#if DEBUG_INT16
+# define BX_DEBUG_INT16(...) BX_DEBUG(__VA_ARGS__)
+#else
+# define BX_DEBUG_INT16(...)
+#endif
+
+extern void post(void);
+#pragma aux post "*";
+
+void jmp_post(void);
+#pragma aux jmp_post = "jmp far ptr post" aborts;
+
+extern void eoi_master_pic(void); /* in assembly code */
+#pragma aux eoi_master_pic "*";
+
+/* Manually save/restore BP around invoking user Ctrl-Break handler.
+ * The handler could conceivably clobber BP and the compiler does not
+ * believe us when we say 'modify [bp]' (BP is considered unalterable).
+ */
+void int_1b(void);
+#pragma aux int_1b = \
+ "push bp" \
+ "int 1Bh" \
+ "pop bp" \
+ value [bp] modify [bp];
+
+
+#define none 0
+#define MAX_SCAN_CODE 0x58
+
+struct {
+ uint16_t normal;
+ uint16_t shift;
+ uint16_t control;
+ uint16_t alt;
+ uint8_t lock_flags;
+} static const scan_to_scanascii[MAX_SCAN_CODE + 1] = {
+ { none, none, none, none, none },
+ { 0x011b, 0x011b, 0x011b, 0x0100, none }, /* escape */
+ { 0x0231, 0x0221, none, 0x7800, none }, /* 1! */
+ { 0x0332, 0x0340, 0x0300, 0x7900, none }, /* 2@ */
+ { 0x0433, 0x0423, none, 0x7a00, none }, /* 3# */
+ { 0x0534, 0x0524, none, 0x7b00, none }, /* 4$ */
+ { 0x0635, 0x0625, none, 0x7c00, none }, /* 5% */
+ { 0x0736, 0x075e, 0x071e, 0x7d00, none }, /* 6^ */
+ { 0x0837, 0x0826, none, 0x7e00, none }, /* 7& */
+ { 0x0938, 0x092a, none, 0x7f00, none }, /* 8* */
+ { 0x0a39, 0x0a28, none, 0x8000, none }, /* 9( */
+ { 0x0b30, 0x0b29, none, 0x8100, none }, /* 0) */
+ { 0x0c2d, 0x0c5f, 0x0c1f, 0x8200, none }, /* -_ */
+ { 0x0d3d, 0x0d2b, none, 0x8300, none }, /* =+ */
+ { 0x0e08, 0x0e08, 0x0e7f, none, none }, /* backspace */
+ { 0x0f09, 0x0f00, none, none, none }, /* tab */
+ { 0x1071, 0x1051, 0x1011, 0x1000, 0x40 }, /* Q */
+ { 0x1177, 0x1157, 0x1117, 0x1100, 0x40 }, /* W */
+ { 0x1265, 0x1245, 0x1205, 0x1200, 0x40 }, /* E */
+ { 0x1372, 0x1352, 0x1312, 0x1300, 0x40 }, /* R */
+ { 0x1474, 0x1454, 0x1414, 0x1400, 0x40 }, /* T */
+ { 0x1579, 0x1559, 0x1519, 0x1500, 0x40 }, /* Y */
+ { 0x1675, 0x1655, 0x1615, 0x1600, 0x40 }, /* U */
+ { 0x1769, 0x1749, 0x1709, 0x1700, 0x40 }, /* I */
+ { 0x186f, 0x184f, 0x180f, 0x1800, 0x40 }, /* O */
+ { 0x1970, 0x1950, 0x1910, 0x1900, 0x40 }, /* P */
+ { 0x1a5b, 0x1a7b, 0x1a1b, none, none }, /* [{ */
+ { 0x1b5d, 0x1b7d, 0x1b1d, none, none }, /* ]} */
+ { 0x1c0d, 0x1c0d, 0x1c0a, none, none }, /* Enter */
+ { none, none, none, none, none }, /* L Ctrl */
+ { 0x1e61, 0x1e41, 0x1e01, 0x1e00, 0x40 }, /* A */
+ { 0x1f73, 0x1f53, 0x1f13, 0x1f00, 0x40 }, /* S */
+ { 0x2064, 0x2044, 0x2004, 0x2000, 0x40 }, /* D */
+ { 0x2166, 0x2146, 0x2106, 0x2100, 0x40 }, /* F */
+ { 0x2267, 0x2247, 0x2207, 0x2200, 0x40 }, /* G */
+ { 0x2368, 0x2348, 0x2308, 0x2300, 0x40 }, /* H */
+ { 0x246a, 0x244a, 0x240a, 0x2400, 0x40 }, /* J */
+ { 0x256b, 0x254b, 0x250b, 0x2500, 0x40 }, /* K */
+ { 0x266c, 0x264c, 0x260c, 0x2600, 0x40 }, /* L */
+ { 0x273b, 0x273a, none, none, none }, /* ;: */
+ { 0x2827, 0x2822, none, none, none }, /* '" */
+ { 0x2960, 0x297e, none, none, none }, /* `~ */
+ { none, none, none, none, none }, /* L shift */
+ { 0x2b5c, 0x2b7c, 0x2b1c, none, none }, /* |\ */
+ { 0x2c7a, 0x2c5a, 0x2c1a, 0x2c00, 0x40 }, /* Z */
+ { 0x2d78, 0x2d58, 0x2d18, 0x2d00, 0x40 }, /* X */
+ { 0x2e63, 0x2e43, 0x2e03, 0x2e00, 0x40 }, /* C */
+ { 0x2f76, 0x2f56, 0x2f16, 0x2f00, 0x40 }, /* V */
+ { 0x3062, 0x3042, 0x3002, 0x3000, 0x40 }, /* B */
+ { 0x316e, 0x314e, 0x310e, 0x3100, 0x40 }, /* N */
+ { 0x326d, 0x324d, 0x320d, 0x3200, 0x40 }, /* M */
+ { 0x332c, 0x333c, none, none, none }, /* ,< */
+ { 0x342e, 0x343e, none, none, none }, /* .> */
+ { 0x352f, 0x353f, none, none, none }, /* /? */
+ { none, none, none, none, none }, /* R Shift */
+ { 0x372a, 0x372a, none, none, none }, /* * */
+ { none, none, none, none, none }, /* L Alt */
+ { 0x3920, 0x3920, 0x3920, 0x3920, none }, /* space */
+ { none, none, none, none, none }, /* caps lock */
+ { 0x3b00, 0x5400, 0x5e00, 0x6800, none }, /* F1 */
+ { 0x3c00, 0x5500, 0x5f00, 0x6900, none }, /* F2 */
+ { 0x3d00, 0x5600, 0x6000, 0x6a00, none }, /* F3 */
+ { 0x3e00, 0x5700, 0x6100, 0x6b00, none }, /* F4 */
+ { 0x3f00, 0x5800, 0x6200, 0x6c00, none }, /* F5 */
+ { 0x4000, 0x5900, 0x6300, 0x6d00, none }, /* F6 */
+ { 0x4100, 0x5a00, 0x6400, 0x6e00, none }, /* F7 */
+ { 0x4200, 0x5b00, 0x6500, 0x6f00, none }, /* F8 */
+ { 0x4300, 0x5c00, 0x6600, 0x7000, none }, /* F9 */
+ { 0x4400, 0x5d00, 0x6700, 0x7100, none }, /* F10 */
+ { none, none, none, none, none }, /* Num Lock */
+ { none, none, none, none, none }, /* Scroll Lock */
+ { 0x4700, 0x4737, 0x7700, none, 0x20 }, /* 7 Home */
+ { 0x4800, 0x4838, none, none, 0x20 }, /* 8 UP */
+ { 0x4900, 0x4939, 0x8400, none, 0x20 }, /* 9 PgUp */
+ { 0x4a2d, 0x4a2d, none, none, none }, /* - */
+ { 0x4b00, 0x4b34, 0x7300, none, 0x20 }, /* 4 Left */
+ { 0x4c00, 0x4c35, none, none, 0x20 }, /* 5 */
+ { 0x4d00, 0x4d36, 0x7400, none, 0x20 }, /* 6 Right */
+ { 0x4e2b, 0x4e2b, none, none, none }, /* + */
+ { 0x4f00, 0x4f31, 0x7500, none, 0x20 }, /* 1 End */
+ { 0x5000, 0x5032, none, none, 0x20 }, /* 2 Down */
+ { 0x5100, 0x5133, 0x7600, none, 0x20 }, /* 3 PgDn */
+ { 0x5200, 0x5230, none, none, 0x20 }, /* 0 Ins */
+ { 0x5300, 0x532e, none, none, 0x20 }, /* Del */
+ { none, none, none, none, none },
+ { none, none, none, none, none },
+ { 0x565c, 0x567c, none, none, none }, /* \| */
+ { 0x8500, 0x8700, 0x8900, 0x8b00, none }, /* F11 */
+ { 0x8600, 0x8800, 0x8a00, 0x8c00, none } /* F12 */
+};
+
+
+/* Keyboard initialization. */
+
+//--------------------------------------------------------------------------
+// keyboard_panic
+//--------------------------------------------------------------------------
+void keyboard_panic(uint16_t status)
+{
+ // If you're getting a 993 keyboard panic here,
+ // please see the comment in keyboard_init
+
+ BX_PANIC("Keyboard error:%u\n",status);
+}
+
+
+//--------------------------------------------------------------------------
+// keyboard_init
+//--------------------------------------------------------------------------
+// this file is based on LinuxBIOS implementation of keyboard.c
+// could convert to #asm to gain space
+void BIOSCALL keyboard_init(void)
+{
+ uint16_t max;
+
+ /* ------------------- controller side ----------------------*/
+ /* send cmd = 0xAA, self test 8042 */
+ outb(0x64, 0xaa);
+
+ /* Wait until buffer is empty */
+ max=0xffff;
+ while ( (inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x00);
+ if (max==0x0) keyboard_panic(00);
+
+ /* Wait for data */
+ max=0xffff;
+ while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x01);
+ if (max==0x0) keyboard_panic(01);
+
+ /* read self-test result, 0x55 should be returned from 0x60 */
+ if ((inb(0x60) != 0x55)){
+ keyboard_panic(991);
+ }
+
+ /* send cmd = 0xAB, keyboard interface test */
+ outb(0x64,0xab);
+
+ /* Wait until buffer is empty */
+ max=0xffff;
+ while ((inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x10);
+ if (max==0x0) keyboard_panic(10);
+
+ /* Wait for data */
+ max=0xffff;
+ while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x11);
+ if (max==0x0) keyboard_panic(11);
+
+ /* read keyboard interface test result, */
+ /* 0x00 should be returned form 0x60 */
+ if ((inb(0x60) != 0x00)) {
+ keyboard_panic(992);
+ }
+
+ /* ------------------- keyboard side ------------------------*/
+ /* reset keyboard and self test (keyboard side) */
+ /* also enables the keyboard interface */
+ outb(0x60, 0xff);
+
+ /* Wait until buffer is empty */
+ max=0xffff;
+ while ((inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x20);
+ if (max==0x0) keyboard_panic(20);
+
+ /* Wait for data */
+ max=0xffff;
+ while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x21);
+ if (max==0x0) keyboard_panic(21);
+
+ /* keyboard should return ACK */
+ if ((inb(0x60) != 0xfa)) {
+ keyboard_panic(993);
+ }
+
+ /* Wait for reset to complete */
+ while ( (inb(0x64) & 0x01) == 0 ) outb(0x80, 0x31);
+
+ if ((inb(0x60) != 0xaa && inb(0x60) != 0xaa)) {
+ keyboard_panic(994);
+ }
+
+ /* Disable keyboard */
+ outb(0x60, 0xf5);
+
+ /* Wait until buffer is empty */
+ max=0xffff;
+ while ((inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x40);
+ if (max==0x0) keyboard_panic(40);
+
+ /* Wait for data */
+ max=0xffff;
+ while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x41);
+ if (max==0x0) keyboard_panic(41);
+
+ /* keyboard should return ACK */
+ if ((inb(0x60) != 0xfa)) {
+ keyboard_panic(995);
+ }
+
+ /* Write Keyboard Mode */
+ outb(0x64, 0x60);
+
+ /* Wait until buffer is empty */
+ max=0xffff;
+ while ((inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x50);
+ if (max==0x0) keyboard_panic(50);
+
+ /* send cmd: scan code convert, disable mouse, enable IRQ 1 */
+ outb(0x60, 0x65);
+
+ /* Wait until buffer is empty */
+ max=0xffff;
+ while ((inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x60);
+ if (max==0x0) keyboard_panic(60);
+
+ /* Enable keyboard */
+ outb(0x60, 0xf4);
+
+ /* Wait until buffer is empty */
+ max=0xffff;
+ while ((inb(0x64) & 0x02) && (--max>0)) outb(0x80, 0x70);
+ if (max==0x0) keyboard_panic(70);
+
+ /* Wait for data */
+ max=0xffff;
+ while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x71);
+ if (max==0x0) keyboard_panic(70);
+
+ /* keyboard should return ACK */
+ if ((inb(0x60) != 0xfa)) {
+ keyboard_panic(996);
+ }
+
+ /* Enable aux interface */
+ outb(0x64,0xa8);
+
+ /* While we're here, disable the A20 gate. Required for
+ * compatibility with the IBM PC and DOS.
+ */
+ set_enable_a20(0);
+}
+
+
+unsigned int enqueue_key(uint8_t scan_code, uint8_t ascii_code)
+{
+ uint16_t buffer_start, buffer_end, buffer_head, buffer_tail, temp_tail;
+
+#if VBOX_BIOS_CPU >= 80286
+ buffer_start = read_word(0x0040, 0x0080);
+ buffer_end = read_word(0x0040, 0x0082);
+#else
+ buffer_start = 0x001E;
+ buffer_end = 0x003E;
+#endif
+
+ buffer_head = read_word(0x0040, 0x001A);
+ buffer_tail = read_word(0x0040, 0x001C);
+
+ temp_tail = buffer_tail;
+ buffer_tail += 2;
+ if (buffer_tail >= buffer_end)
+ buffer_tail = buffer_start;
+
+ if (buffer_tail == buffer_head)
+ return(0);
+
+ write_byte(0x0040, temp_tail, ascii_code);
+ write_byte(0x0040, temp_tail+1, scan_code);
+ write_word(0x0040, 0x001C, buffer_tail);
+ return(1);
+}
+
+
+/* Keyboard hardware interrupt handler. */
+/// @todo should this be declared as taking arguments at all?
+void BIOSCALL int09_function(uint16_t ES, uint16_t DI, uint16_t SI, uint16_t BP, uint16_t SP,
+ uint16_t BX, uint16_t DX, uint16_t CX, uint16_t AX)
+{
+ uint8_t scancode, asciicode, shift_flags;
+ uint8_t mf2_flags, mf2_state, flag;
+
+ //
+ // DS has been set to F000 before call
+ //
+
+
+ scancode = GET_AL();
+
+ if (scancode == 0) {
+ BX_INFO("KBD: int09 handler: AL=0\n");
+ return;
+ }
+
+ mf2_flags = read_byte(0x0040, 0x18);
+ mf2_state = read_byte(0x0040, 0x96);
+ shift_flags = read_byte(0x0040, 0x17);
+ asciicode = 0;
+
+ switch (scancode) {
+ case 0x3a: /* Caps Lock press */
+ shift_flags ^= 0x40;
+ write_byte(0x0040, 0x17, shift_flags);
+ mf2_flags |= 0x40;
+ write_byte(0x0040, 0x18, mf2_flags);
+ break;
+ case 0xba: /* Caps Lock release */
+ mf2_flags &= ~0x40;
+ write_byte(0x0040, 0x18, mf2_flags);
+ break;
+
+ case 0x2a: /* L Shift press */
+ case 0xaa: /* L Shift release */
+ case 0x36: /* R Shift press */
+ case 0xb6: /* R Shift release */
+ /* If this was an extended (i.e. faked) key, leave flags alone. */
+ if (!(mf2_state & 0x02)) {
+ flag = (scancode & 0x7f) == 0x2a ? 0x02 : 0x01;
+ if (scancode & 0x80)
+ shift_flags &= ~flag;
+ else
+ shift_flags |= flag;
+ write_byte(0x0040, 0x17, shift_flags);
+ }
+ break;
+
+ case 0x1d: /* Ctrl press */
+ if ((mf2_state & 0x01) == 0) {
+ shift_flags |= 0x04;
+ write_byte(0x0040, 0x17, shift_flags);
+ if (mf2_state & 0x02) {
+ mf2_state |= 0x04;
+ write_byte(0x0040, 0x96, mf2_state);
+ } else {
+ mf2_flags |= 0x01;
+ write_byte(0x0040, 0x18, mf2_flags);
+ }
+ }
+ break;
+ case 0x9d: /* Ctrl release */
+ if ((mf2_state & 0x01) == 0) {
+ shift_flags &= ~0x04;
+ write_byte(0x0040, 0x17, shift_flags);
+ if (mf2_state & 0x02) {
+ mf2_state &= ~0x04;
+ write_byte(0x0040, 0x96, mf2_state);
+ } else {
+ mf2_flags &= ~0x01;
+ write_byte(0x0040, 0x18, mf2_flags);
+ }
+ }
+ break;
+
+ case 0x38: /* Alt press */
+ shift_flags |= 0x08;
+ write_byte(0x0040, 0x17, shift_flags);
+ if (mf2_state & 0x02) {
+ mf2_state |= 0x08;
+ write_byte(0x0040, 0x96, mf2_state);
+ } else {
+ mf2_flags |= 0x02;
+ write_byte(0x0040, 0x18, mf2_flags);
+ }
+ break;
+ case 0xb8: /* Alt release */
+ shift_flags &= ~0x08;
+ write_byte(0x0040, 0x17, shift_flags);
+ if (mf2_state & 0x02) {
+ mf2_state &= ~0x08;
+ write_byte(0x0040, 0x96, mf2_state);
+ } else {
+ mf2_flags &= ~0x02;
+ write_byte(0x0040, 0x18, mf2_flags);
+ }
+ break;
+
+ case 0x45: /* Num Lock/Pause press */
+ if ((mf2_state & 0x03) == 0) {
+ /* Num Lock */
+ mf2_flags |= 0x20;
+ write_byte(0x0040, 0x18, mf2_flags);
+ shift_flags ^= 0x20;
+ write_byte(0x0040, 0x17, shift_flags);
+ } else {
+ /* Pause */
+ mf2_flags |= 0x08; /* Set the suspend flag */
+ write_byte(0x0040, 0x18, mf2_flags);
+
+ /* Enable keyboard and send EOI. */
+ outp(0x64, 0xae);
+ eoi_master_pic();
+
+ while (read_byte(0x0040, 0x18) & 0x08)
+ ; /* Hold on and wait... */
+
+ /// @todo We will send EOI again (and enable keyboard) on the way out; we shouldn't
+ }
+ break;
+ case 0xc5: /* Num Lock/Pause release */
+ if ((mf2_state & 0x03) == 0) {
+ mf2_flags &= ~0x20;
+ write_byte(0x0040, 0x18, mf2_flags);
+ }
+ break;
+
+ case 0x46: /* Scroll Lock/Break press */
+ if (mf2_state & 0x02) { /* E0 prefix? */
+ /* Zap the keyboard buffer. */
+ write_word(0x0040, 0x001c, read_word(0x0040, 0x001a));
+
+ write_byte(0x0040, 0x71, 0x80); /* Set break flag */
+ outp(0x64, 0xae); /* Enable keyboard */
+ int_1b(); /* Invoke user handler */
+ enqueue_key(0, 0); /* Dummy key press*/
+ } else {
+ mf2_flags |= 0x10;
+ write_byte(0x0040, 0x18, mf2_flags);
+ shift_flags ^= 0x10;
+ write_byte(0x0040, 0x17, shift_flags);
+ }
+ break;
+
+ case 0xc6: /* Scroll Lock/Break release */
+ if (!(mf2_state & 0x02)) { /* Only if no E0 prefix */
+ mf2_flags &= ~0x10;
+ write_byte(0x0040, 0x18, mf2_flags);
+ }
+ break;
+
+ case 0x54: /* SysRq press */
+ if (!(mf2_flags & 0x04)) { /* If not already down */
+ mf2_flags |= 0x04;
+ write_byte(0x0040, 0x18, mf2_flags);
+ /// @todo EOI/enable kbd/enable interrupts/call INT 15h/8500h
+ }
+ break;
+
+ case 0xd4: /* SysRq release */
+ mf2_flags &= ~0x04;
+ write_byte(0x0040, 0x18, mf2_flags);
+ /// @todo EOI/enable kbd/enable interrupts/call INT 15h/8501h
+ break;
+
+ case 0x53: /* Del press */
+ if ((shift_flags & 0x0c) == 0x0c) {
+ /* Indicate a warm boot. */
+ write_word(0x0040,0x0072, 0x1234);
+ jmp_post();
+ }
+ /* fall through */
+
+ default:
+ /* Check if suspend flag set. */
+ if (mf2_flags & 0x08) {
+ /* Pause had been pressed. Clear suspend flag and do nothing. */
+ mf2_flags &= ~0x08;
+ write_byte(0x0040, 0x18, mf2_flags);
+ return;
+ }
+
+ if (scancode & 0x80) {
+ /* Set ack/resend flags if appropriate. */
+ if (scancode == 0xFA) {
+ flag = read_byte(0x0040, 0x97) | 0x10;
+ write_byte(0x0040, 0x97, flag);
+ } else if (scancode == 0xFE) {
+ flag = read_byte(0x0040, 0x97) | 0x20;
+ write_byte(0x0040, 0x97, flag);
+ }
+ break; /* toss key releases ... */
+ }
+ if (scancode > MAX_SCAN_CODE) {
+ BX_INFO("KBD: int09h_handler(): unknown scancode read: 0x%02x!\n", scancode);
+ return;
+ }
+ if (shift_flags & 0x08) { /* ALT */
+ asciicode = scan_to_scanascii[scancode].alt;
+ scancode = scan_to_scanascii[scancode].alt >> 8;
+ } else if (shift_flags & 0x04) { /* CONTROL */
+ asciicode = scan_to_scanascii[scancode].control;
+ scancode = scan_to_scanascii[scancode].control >> 8;
+ } else if (((mf2_state & 0x02) > 0) && ((scancode >= 0x47) && (scancode <= 0x53))) {
+ /* extended keys handling */
+ asciicode = 0xe0;
+ scancode = scan_to_scanascii[scancode].normal >> 8;
+ } else if (shift_flags & 0x03) { /* LSHIFT + RSHIFT */
+ /* check if lock state should be ignored
+ * because a SHIFT key are pressed */
+
+ if (shift_flags & scan_to_scanascii[scancode].lock_flags) {
+ asciicode = scan_to_scanascii[scancode].normal;
+ scancode = scan_to_scanascii[scancode].normal >> 8;
+ } else {
+ asciicode = scan_to_scanascii[scancode].shift;
+ scancode = scan_to_scanascii[scancode].shift >> 8;
+ }
+ } else {
+ /* check if lock is on */
+ if (shift_flags & scan_to_scanascii[scancode].lock_flags) {
+ asciicode = scan_to_scanascii[scancode].shift;
+ scancode = scan_to_scanascii[scancode].shift >> 8;
+ } else {
+ asciicode = scan_to_scanascii[scancode].normal;
+ scancode = scan_to_scanascii[scancode].normal >> 8;
+ }
+ }
+ if (scancode==0 && asciicode==0) {
+ BX_INFO("KBD: int09h_handler(): scancode & asciicode are zero?\n");
+ }
+ enqueue_key(scancode, asciicode);
+ break;
+ }
+ if ((scancode & 0x7f) != 0x1d) {
+ mf2_state &= ~0x01;
+ }
+ mf2_state &= ~0x02;
+ write_byte(0x0040, 0x96, mf2_state);
+}
+
+unsigned int dequeue_key(uint8_t __far *scan_code, uint8_t __far *ascii_code, unsigned incr)
+{
+ uint16_t buffer_start, buffer_end, buffer_head, buffer_tail;
+ uint8_t acode, scode;
+
+#if VBOX_BIOS_CPU >= 80286
+ buffer_start = read_word(0x0040, 0x0080);
+ buffer_end = read_word(0x0040, 0x0082);
+#else
+ buffer_start = 0x001E;
+ buffer_end = 0x003E;
+#endif
+
+ buffer_head = read_word(0x0040, 0x001a);
+ buffer_tail = read_word(0x0040, 0x001c);
+
+ if (buffer_head != buffer_tail) {
+ acode = read_byte(0x0040, buffer_head);
+ scode = read_byte(0x0040, buffer_head+1);
+ *ascii_code = acode;
+ *scan_code = scode;
+ BX_DEBUG_INT16("dequeue_key: ascii=%02x scan=%02x \n", acode, scode);
+
+ if (incr) {
+ buffer_head += 2;
+ if (buffer_head >= buffer_end)
+ buffer_head = buffer_start;
+ write_word(0x0040, 0x001a, buffer_head);
+ }
+ return(1);
+ }
+ else {
+ return(0);
+ }
+}
+
+
+/// @todo move somewhere else?
+#define AX r.gr.u.r16.ax
+#define BX r.gr.u.r16.bx
+#define CX r.gr.u.r16.cx
+#define DX r.gr.u.r16.dx
+#define SI r.gr.u.r16.si
+#define DI r.gr.u.r16.di
+#define BP r.gr.u.r16.bp
+#define SP r.gr.u.r16.sp
+#define FLAGS r.ra.flags.u.r16.flags
+#define IFLGS r.ifl
+
+/* Interrupt 16h service implementation. */
+
+void BIOSCALL int16_function(volatile kbd_regs_t r)
+{
+ uint8_t scan_code, ascii_code, shift_flags, led_flags, count;
+ uint16_t kbd_code, max;
+
+ BX_DEBUG_INT16("int16: AX=%04x BX=%04x CX=%04x DX=%04x \n", AX, BX, CX, DX);
+
+ shift_flags = read_byte(0x0040, 0x17);
+ led_flags = read_byte(0x0040, 0x97);
+ if ((((shift_flags >> 4) & 0x07) ^ (led_flags & 0x07)) != 0) {
+ int_disable(); /// @todo interrupts should be disabled already??
+ outb(0x60, 0xed);
+ while ((inb(0x64) & 0x01) == 0) outb(0x80, 0x21);
+ if ((inb(0x60) == 0xfa)) {
+ led_flags &= 0xc8;
+ led_flags |= ((shift_flags >> 4) & 0x07);
+ outb(0x60, led_flags & 0x07);
+ while ((inb(0x64) & 0x01) == 0)
+ outb(0x80, 0x21);
+ inb(0x60);
+ write_byte(0x0040, 0x97, led_flags);
+ }
+ int_enable();
+ }
+
+ switch (GET_AH()) {
+ case 0x00: /* read keyboard input */
+ if ( !dequeue_key(&scan_code, &ascii_code, 1) ) {
+ BX_PANIC("KBD: int16h: out of keyboard input\n");
+ }
+ if (scan_code !=0 && ascii_code == 0xF0)
+ ascii_code = 0;
+ else if (ascii_code == 0xE0)
+ ascii_code = 0;
+ AX = (scan_code << 8) | ascii_code;
+ break;
+
+ case 0x01: /* check keyboard status */
+ /* Enable interrupts, preserve most flags. Some callers depend on that! */
+ FLAGS = IFLGS;
+ if ( !dequeue_key(&scan_code, &ascii_code, 0) ) {
+ SET_ZF();
+ return;
+ }
+ if (scan_code !=0 && ascii_code == 0xF0)
+ ascii_code = 0;
+ else if (ascii_code == 0xE0)
+ ascii_code = 0;
+ AX = (scan_code << 8) | ascii_code;
+ CLEAR_ZF();
+ break;
+
+ case 0x02: /* get shift flag status */
+ shift_flags = read_byte(0x0040, 0x17);
+ SET_AL(shift_flags);
+ break;
+
+ case 0x05: /* store key-stroke into buffer */
+ if ( !enqueue_key(GET_CH(), GET_CL()) ) {
+ SET_AL(1);
+ }
+ else {
+ SET_AL(0);
+ }
+ break;
+
+ case 0x09: /* GET KEYBOARD FUNCTIONALITY */
+ // bit Bochs Description
+ // 7 0 reserved
+ // 6 0 INT 16/AH=20h-22h supported (122-key keyboard support)
+ // 5 1 INT 16/AH=10h-12h supported (enhanced keyboard support)
+ // 4 1 INT 16/AH=0Ah supported
+ // 3 0 INT 16/AX=0306h supported
+ // 2 0 INT 16/AX=0305h supported
+ // 1 0 INT 16/AX=0304h supported
+ // 0 0 INT 16/AX=0300h supported
+ //
+ SET_AL(0x30);
+ break;
+
+ case 0x0A: /* GET KEYBOARD ID */
+ count = 2;
+ kbd_code = 0x0;
+ /// @todo Might be better to just mask the KB interrupt
+ int_disable();
+ outb(0x60, 0xf2);
+ /* Wait for data */
+ max=0xffff;
+ while ( ((inb(0x64) & 0x01) == 0) && (--max>0) )
+ inb(0x80);
+ if (max>0x0) {
+ if ((inb(0x60) == 0xfa)) {
+ do {
+ max=0xffff;
+ while ( ((inb(0x64) & 0x01) == 0) && (--max>0) )
+ inb(0x80);
+ if (max>0x0) {
+ kbd_code >>= 8;
+ kbd_code |= (inb(0x60) << 8);
+ }
+ } while (--count>0);
+ }
+ }
+ BX=kbd_code;
+ break;
+
+ case 0x10: /* read MF-II keyboard input */
+ if ( !dequeue_key(&scan_code, &ascii_code, 1) ) {
+ BX_PANIC("KBD: int16h: out of keyboard input\n");
+ }
+ if (scan_code !=0 && ascii_code == 0xF0)
+ ascii_code = 0;
+ AX = (scan_code << 8) | ascii_code;
+ break;
+
+ case 0x11: /* check MF-II keyboard status */
+ /* Enable interrupts, preserve most flags. Some callers depend on that! */
+ FLAGS = IFLGS;
+ if ( !dequeue_key(&scan_code, &ascii_code, 0) ) {
+ SET_ZF();
+ return;
+ }
+ if (scan_code !=0 && ascii_code == 0xF0)
+ ascii_code = 0;
+ AX = (scan_code << 8) | ascii_code;
+ CLEAR_ZF();
+ break;
+
+ case 0x12: /* get extended keyboard status */
+ shift_flags = read_byte(0x0040, 0x17);
+ SET_AL(shift_flags);
+ shift_flags = read_byte(0x0040, 0x18) & 0x73;
+ shift_flags |= read_byte(0x0040, 0x96) & 0x0c;
+ SET_AH(shift_flags);
+ BX_DEBUG_INT16("int16: func 12 sending %04x\n",AX);
+ break;
+
+ case 0x92: /* keyboard capability check called by DOS 5.0+ keyb */
+ SET_AH(0x80); // function int16 ah=0x10-0x12 supported
+ break;
+
+ case 0xA2: /* 122 keys capability check called by DOS 5.0+ keyb */
+ // don't change AH : function int16 ah=0x20-0x22 NOT supported
+ break;
+
+ /// @todo what's the point of handling this??
+#if 0
+ case 0x6F:
+ if (GET_AL() == 0x08)
+ SET_AH(0x02); // unsupported, aka normal keyboard
+#endif
+
+ default:
+ BX_INFO("KBD: unsupported int 16h function %02x\n", GET_AH());
+ BX_INFO("AX=%04x BX=%04x CX=%04x DX=%04x \n", AX, BX, CX, DX);
+ }
+ BX_DEBUG_INT16("int16ex: AX=%04x BX=%04x CX=%04x DX=%04x \n", AX, BX, CX, DX);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-08 07:19:49 +0000