keyboard.c revision c58f1213e628a545081c70e26c6b67a841cff880
/*
* Copyright (C) 2006-2012 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.
* --------------------------------------------------------------------
*
* 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
*
*/
#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;
#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 data */
max=0xffff;
while ( ((inb(0x64) & 0x01) == 0) && (--max>0) ) outb(0x80, 0x31);
if (max==0x0) keyboard_panic(31);
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 BX_CPU < 2
buffer_start = 0x001E;
buffer_end = 0x003E;
#else
buffer_start = read_word(0x0040, 0x0080);
buffer_end = read_word(0x0040, 0x0082);
#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;
}
shift_flags = read_byte(0x0040, 0x17);
mf2_flags = read_byte(0x0040, 0x18);
mf2_state = read_byte(0x0040, 0x96);
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 press */
if ((mf2_state & 0x03) == 0) {
mf2_flags |= 0x20;
write_byte(0x0040, 0x18, mf2_flags);
shift_flags ^= 0x20;
write_byte(0x0040, 0x17, shift_flags);
}
break;
case 0xc5: /* Num Lock release */
if ((mf2_state & 0x03) == 0) {
mf2_flags &= ~0x20;
write_byte(0x0040, 0x18, mf2_flags);
}
break;
case 0x46: /* Scroll Lock press */
mf2_flags |= 0x10;
write_byte(0x0040, 0x18, mf2_flags);
shift_flags ^= 0x10;
write_byte(0x0040, 0x17, shift_flags);
break;
case 0xc6: /* Scroll Lock release */
mf2_flags &= ~0x10;
write_byte(0x0040, 0x18, mf2_flags);
break;
case 0x53: /* Del press */
if ((shift_flags & 0x0c) == 0x0c)
jmp_post();
/* fall through */
default:
if (scancode & 0x80) {
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 BX_CPU < 2
buffer_start = 0x001E;
buffer_end = 0x003E;
#else
buffer_start = read_word(0x0040, 0x0080);
buffer_end = read_word(0x0040, 0x0082);
#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
/* 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 &= 0xf8;
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 */
SET_IF(); /* Enable interrupts. Some callers depend on that! */
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 */
SET_IF();
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);
}