| // 16bit code to handle keyboard requests. |
| // |
| // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net> |
| // Copyright (C) 2002 MandrakeSoft S.A. |
| // |
| // This file may be distributed under the terms of the GNU LGPLv3 license. |
| |
| #include "biosvar.h" // GET_BDA |
| #include "bregs.h" // struct bregs |
| #include "config.h" // CONFIG_* |
| #include "hw/ps2port.h" // ps2_kbd_command |
| #include "hw/usb-hid.h" // usb_kbd_command |
| #include "output.h" // debug_enter |
| #include "stacks.h" // yield |
| #include "string.h" // memset |
| #include "util.h" // kbd_init |
| |
| void |
| kbd_init(void) |
| { |
| dprintf(3, "init keyboard\n"); |
| u16 x = offsetof(struct bios_data_area_s, kbd_buf); |
| SET_BDA(kbd_flag1, KF1_101KBD); |
| SET_BDA(kbd_buf_head, x); |
| SET_BDA(kbd_buf_tail, x); |
| SET_BDA(kbd_buf_start_offset, x); |
| |
| SET_BDA(kbd_buf_end_offset |
| , x + FIELD_SIZEOF(struct bios_data_area_s, kbd_buf)); |
| } |
| |
| static u8 |
| enqueue_key(u16 keycode) |
| { |
| u16 buffer_start = GET_BDA(kbd_buf_start_offset); |
| u16 buffer_end = GET_BDA(kbd_buf_end_offset); |
| |
| u16 buffer_head = GET_BDA(kbd_buf_head); |
| u16 buffer_tail = GET_BDA(kbd_buf_tail); |
| |
| u16 temp_tail = buffer_tail; |
| buffer_tail += 2; |
| if (buffer_tail >= buffer_end) |
| buffer_tail = buffer_start; |
| |
| if (buffer_tail == buffer_head) |
| return 0; |
| |
| SET_FARVAR(SEG_BDA, *(u16*)(temp_tail+0), keycode); |
| SET_BDA(kbd_buf_tail, buffer_tail); |
| return 1; |
| } |
| |
| static void |
| dequeue_key(struct bregs *regs, int incr, int extended) |
| { |
| yield(); |
| u16 buffer_head; |
| u16 buffer_tail; |
| for (;;) { |
| buffer_head = GET_BDA(kbd_buf_head); |
| buffer_tail = GET_BDA(kbd_buf_tail); |
| |
| if (buffer_head != buffer_tail) |
| break; |
| if (!incr) { |
| regs->flags |= F_ZF; |
| return; |
| } |
| yield_toirq(); |
| } |
| |
| u16 keycode = GET_FARVAR(SEG_BDA, *(u16*)(buffer_head+0)); |
| u8 ascii = keycode & 0xff; |
| if (!extended) { |
| // Translate extended keys |
| if (ascii == 0xe0 && keycode & 0xff00) |
| keycode &= 0xff00; |
| else if (keycode == 0xe00d || keycode == 0xe00a) |
| // Extended enter key |
| keycode = 0x1c00 | ascii; |
| else if (keycode == 0xe02f) |
| // Extended '/' key |
| keycode = 0x352f; |
| // Technically, if the ascii value is 0xf0 or if the |
| // 'scancode' is greater than 0x84 then the key should be |
| // discarded. However, there seems no harm in passing on the |
| // extended values in these cases. |
| } |
| if (ascii == 0xf0 && keycode & 0xff00) |
| keycode &= 0xff00; |
| regs->ax = keycode; |
| |
| if (!incr) { |
| regs->flags &= ~F_ZF; |
| return; |
| } |
| u16 buffer_start = GET_BDA(kbd_buf_start_offset); |
| u16 buffer_end = GET_BDA(kbd_buf_end_offset); |
| |
| buffer_head += 2; |
| if (buffer_head >= buffer_end) |
| buffer_head = buffer_start; |
| SET_BDA(kbd_buf_head, buffer_head); |
| } |
| |
| static int |
| kbd_command(int command, u8 *param) |
| { |
| if (usb_kbd_active()) |
| return usb_kbd_command(command, param); |
| return ps2_kbd_command(command, param); |
| } |
| |
| // read keyboard input |
| static void |
| handle_1600(struct bregs *regs) |
| { |
| dequeue_key(regs, 1, 0); |
| } |
| |
| // check keyboard status |
| static void |
| handle_1601(struct bregs *regs) |
| { |
| dequeue_key(regs, 0, 0); |
| } |
| |
| // get shift flag status |
| static void |
| handle_1602(struct bregs *regs) |
| { |
| yield(); |
| regs->al = GET_BDA(kbd_flag0); |
| } |
| |
| // store key-stroke into buffer |
| static void |
| handle_1605(struct bregs *regs) |
| { |
| regs->al = !enqueue_key(regs->cx); |
| } |
| |
| // GET KEYBOARD FUNCTIONALITY |
| static void |
| handle_1609(struct bregs *regs) |
| { |
| // 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 |
| // |
| regs->al = 0x30; |
| } |
| |
| // GET KEYBOARD ID |
| static void noinline |
| handle_160a(struct bregs *regs) |
| { |
| u8 param[2]; |
| int ret = kbd_command(ATKBD_CMD_GETID, param); |
| if (ret) { |
| regs->bx = 0; |
| return; |
| } |
| regs->bx = (param[1] << 8) | param[0]; |
| } |
| |
| // read MF-II keyboard input |
| static void |
| handle_1610(struct bregs *regs) |
| { |
| dequeue_key(regs, 1, 1); |
| } |
| |
| // check MF-II keyboard status |
| static void |
| handle_1611(struct bregs *regs) |
| { |
| dequeue_key(regs, 0, 1); |
| } |
| |
| // get extended keyboard status |
| static void |
| handle_1612(struct bregs *regs) |
| { |
| yield(); |
| regs->ax = ((GET_BDA(kbd_flag0) & ~((KF1_RCTRL|KF1_RALT) << 8)) |
| | ((GET_BDA(kbd_flag1) & (KF1_RCTRL|KF1_RALT)) << 8)); |
| //BX_DEBUG_INT16("int16: func 12 sending %04x\n",AX); |
| } |
| |
| static void |
| handle_166f(struct bregs *regs) |
| { |
| if (regs->al == 0x08) |
| // unsupported, aka normal keyboard |
| regs->ah = 2; |
| } |
| |
| // keyboard capability check called by DOS 5.0+ keyb |
| static void |
| handle_1692(struct bregs *regs) |
| { |
| // function int16 ah=0x10-0x12 supported |
| regs->ah = 0x80; |
| } |
| |
| // 122 keys capability check called by DOS 5.0+ keyb |
| static void |
| handle_16a2(struct bregs *regs) |
| { |
| // don't change AH : function int16 ah=0x20-0x22 NOT supported |
| } |
| |
| static void |
| handle_16XX(struct bregs *regs) |
| { |
| warn_unimplemented(regs); |
| } |
| |
| static void noinline |
| set_leds(void) |
| { |
| u8 shift_flags = (GET_BDA(kbd_flag0) >> 4) & 0x07; |
| u8 kbd_led = GET_BDA(kbd_led); |
| u8 led_flags = kbd_led & 0x07; |
| if (shift_flags == led_flags) |
| return; |
| |
| int ret = kbd_command(ATKBD_CMD_SETLEDS, &shift_flags); |
| if (ret) |
| // Error |
| return; |
| kbd_led = (kbd_led & ~0x07) | shift_flags; |
| SET_BDA(kbd_led, kbd_led); |
| } |
| |
| // INT 16h Keyboard Service Entry Point |
| void VISIBLE16 |
| handle_16(struct bregs *regs) |
| { |
| debug_enter(regs, DEBUG_HDL_16); |
| if (! CONFIG_KEYBOARD) |
| return; |
| |
| // XXX - set_leds should be called from irq handler |
| set_leds(); |
| |
| switch (regs->ah) { |
| case 0x00: handle_1600(regs); break; |
| case 0x01: handle_1601(regs); break; |
| case 0x02: handle_1602(regs); break; |
| case 0x05: handle_1605(regs); break; |
| case 0x09: handle_1609(regs); break; |
| case 0x0a: handle_160a(regs); break; |
| case 0x10: handle_1610(regs); break; |
| case 0x11: handle_1611(regs); break; |
| case 0x12: handle_1612(regs); break; |
| case 0x92: handle_1692(regs); break; |
| case 0xa2: handle_16a2(regs); break; |
| case 0x6f: handle_166f(regs); break; |
| default: handle_16XX(regs); break; |
| } |
| } |
| |
| #define none 0 |
| |
| static struct scaninfo { |
| u16 normal; |
| u16 shift; |
| u16 control; |
| u16 alt; |
| } scan_to_keycode[] VAR16 = { |
| { none, none, none, none }, |
| { 0x011b, 0x011b, 0x011b, 0x01f0 }, /* escape */ |
| { 0x0231, 0x0221, none, 0x7800 }, /* 1! */ |
| { 0x0332, 0x0340, 0x0300, 0x7900 }, /* 2@ */ |
| { 0x0433, 0x0423, none, 0x7a00 }, /* 3# */ |
| { 0x0534, 0x0524, none, 0x7b00 }, /* 4$ */ |
| { 0x0635, 0x0625, none, 0x7c00 }, /* 5% */ |
| { 0x0736, 0x075e, 0x071e, 0x7d00 }, /* 6^ */ |
| { 0x0837, 0x0826, none, 0x7e00 }, /* 7& */ |
| { 0x0938, 0x092a, none, 0x7f00 }, /* 8* */ |
| { 0x0a39, 0x0a28, none, 0x8000 }, /* 9( */ |
| { 0x0b30, 0x0b29, none, 0x8100 }, /* 0) */ |
| { 0x0c2d, 0x0c5f, 0x0c1f, 0x8200 }, /* -_ */ |
| { 0x0d3d, 0x0d2b, none, 0x8300 }, /* =+ */ |
| { 0x0e08, 0x0e08, 0x0e7f, 0x0ef0 }, /* backspace */ |
| { 0x0f09, 0x0f00, 0x9400, 0xa5f0 }, /* tab */ |
| { 0x1071, 0x1051, 0x1011, 0x1000 }, /* Q */ |
| { 0x1177, 0x1157, 0x1117, 0x1100 }, /* W */ |
| { 0x1265, 0x1245, 0x1205, 0x1200 }, /* E */ |
| { 0x1372, 0x1352, 0x1312, 0x1300 }, /* R */ |
| { 0x1474, 0x1454, 0x1414, 0x1400 }, /* T */ |
| { 0x1579, 0x1559, 0x1519, 0x1500 }, /* Y */ |
| { 0x1675, 0x1655, 0x1615, 0x1600 }, /* U */ |
| { 0x1769, 0x1749, 0x1709, 0x1700 }, /* I */ |
| { 0x186f, 0x184f, 0x180f, 0x1800 }, /* O */ |
| { 0x1970, 0x1950, 0x1910, 0x1900 }, /* P */ |
| { 0x1a5b, 0x1a7b, 0x1a1b, 0x1af0 }, /* [{ */ |
| { 0x1b5d, 0x1b7d, 0x1b1d, 0x1bf0 }, /* ]} */ |
| { 0x1c0d, 0x1c0d, 0x1c0a, 0x1cf0 }, /* Enter */ |
| { none, none, none, none }, /* L Ctrl */ |
| { 0x1e61, 0x1e41, 0x1e01, 0x1e00 }, /* A */ |
| { 0x1f73, 0x1f53, 0x1f13, 0x1f00 }, /* S */ |
| { 0x2064, 0x2044, 0x2004, 0x2000 }, /* D */ |
| { 0x2166, 0x2146, 0x2106, 0x2100 }, /* F */ |
| { 0x2267, 0x2247, 0x2207, 0x2200 }, /* G */ |
| { 0x2368, 0x2348, 0x2308, 0x2300 }, /* H */ |
| { 0x246a, 0x244a, 0x240a, 0x2400 }, /* J */ |
| { 0x256b, 0x254b, 0x250b, 0x2500 }, /* K */ |
| { 0x266c, 0x264c, 0x260c, 0x2600 }, /* L */ |
| { 0x273b, 0x273a, none, 0x27f0 }, /* ;: */ |
| { 0x2827, 0x2822, none, 0x28f0 }, /* '" */ |
| { 0x2960, 0x297e, none, 0x29f0 }, /* `~ */ |
| { none, none, none, none }, /* L shift */ |
| { 0x2b5c, 0x2b7c, 0x2b1c, 0x2bf0 }, /* |\ */ |
| { 0x2c7a, 0x2c5a, 0x2c1a, 0x2c00 }, /* Z */ |
| { 0x2d78, 0x2d58, 0x2d18, 0x2d00 }, /* X */ |
| { 0x2e63, 0x2e43, 0x2e03, 0x2e00 }, /* C */ |
| { 0x2f76, 0x2f56, 0x2f16, 0x2f00 }, /* V */ |
| { 0x3062, 0x3042, 0x3002, 0x3000 }, /* B */ |
| { 0x316e, 0x314e, 0x310e, 0x3100 }, /* N */ |
| { 0x326d, 0x324d, 0x320d, 0x3200 }, /* M */ |
| { 0x332c, 0x333c, none, 0x33f0 }, /* ,< */ |
| { 0x342e, 0x343e, none, 0x34f0 }, /* .> */ |
| { 0x352f, 0x353f, none, 0x35f0 }, /* /? */ |
| { none, none, none, none }, /* R Shift */ |
| { 0x372a, 0x372a, 0x9600, 0x37f0 }, /* * */ |
| { none, none, none, none }, /* L Alt */ |
| { 0x3920, 0x3920, 0x3920, 0x3920 }, /* space */ |
| { none, none, none, none }, /* caps lock */ |
| { 0x3b00, 0x5400, 0x5e00, 0x6800 }, /* F1 */ |
| { 0x3c00, 0x5500, 0x5f00, 0x6900 }, /* F2 */ |
| { 0x3d00, 0x5600, 0x6000, 0x6a00 }, /* F3 */ |
| { 0x3e00, 0x5700, 0x6100, 0x6b00 }, /* F4 */ |
| { 0x3f00, 0x5800, 0x6200, 0x6c00 }, /* F5 */ |
| { 0x4000, 0x5900, 0x6300, 0x6d00 }, /* F6 */ |
| { 0x4100, 0x5a00, 0x6400, 0x6e00 }, /* F7 */ |
| { 0x4200, 0x5b00, 0x6500, 0x6f00 }, /* F8 */ |
| { 0x4300, 0x5c00, 0x6600, 0x7000 }, /* F9 */ |
| { 0x4400, 0x5d00, 0x6700, 0x7100 }, /* F10 */ |
| { none, none, none, none }, /* Num Lock */ |
| { none, none, none, none }, /* Scroll Lock */ |
| { 0x4700, 0x4737, 0x7700, none }, /* 7 Home */ |
| { 0x4800, 0x4838, 0x8d00, none }, /* 8 UP */ |
| { 0x4900, 0x4939, 0x8400, none }, /* 9 PgUp */ |
| { 0x4a2d, 0x4a2d, 0x8e00, 0x4af0 }, /* - */ |
| { 0x4b00, 0x4b34, 0x7300, none }, /* 4 Left */ |
| { 0x4c00, 0x4c35, 0x8f00, none }, /* 5 */ |
| { 0x4d00, 0x4d36, 0x7400, none }, /* 6 Right */ |
| { 0x4e2b, 0x4e2b, 0x9000, 0x4ef0 }, /* + */ |
| { 0x4f00, 0x4f31, 0x7500, none }, /* 1 End */ |
| { 0x5000, 0x5032, 0x9100, none }, /* 2 Down */ |
| { 0x5100, 0x5133, 0x7600, none }, /* 3 PgDn */ |
| { 0x5200, 0x5230, 0x9200, none }, /* 0 Ins */ |
| { 0x5300, 0x532e, 0x9300, none }, /* Del */ |
| { none, none, none, none }, /* SysReq */ |
| { none, none, none, none }, |
| { 0x565c, 0x567c, none, none }, /* \| */ |
| { 0x8500, 0x8700, 0x8900, 0x8b00 }, /* F11 */ |
| { 0x8600, 0x8800, 0x8a00, 0x8c00 }, /* F12 */ |
| }; |
| |
| struct scaninfo key_ext_enter VAR16 = { |
| 0xe00d, 0xe00d, 0xe00a, 0xa600 |
| }; |
| struct scaninfo key_ext_slash VAR16 = { |
| 0xe02f, 0xe02f, 0x9500, 0xa400 |
| }; |
| |
| static void |
| kbd_set_flag(int key_release, u16 set_bit0, u8 set_bit1, u16 toggle_bit) |
| { |
| u16 flags0 = GET_BDA(kbd_flag0); |
| u8 flags1 = GET_BDA(kbd_flag1); |
| if (key_release) { |
| flags0 &= ~set_bit0; |
| flags1 &= ~set_bit1; |
| } else { |
| flags0 ^= toggle_bit; |
| flags0 |= set_bit0; |
| flags1 |= set_bit1; |
| } |
| SET_BDA(kbd_flag0, flags0); |
| SET_BDA(kbd_flag1, flags1); |
| } |
| |
| static void |
| kbd_ctrl_break(int key_release) |
| { |
| if (!key_release) |
| return; |
| // Clear keyboard buffer and place 0x0000 in buffer |
| u16 buffer_start = GET_BDA(kbd_buf_start_offset); |
| SET_BDA(kbd_buf_head, buffer_start); |
| SET_BDA(kbd_buf_tail, buffer_start+2); |
| SET_FARVAR(SEG_BDA, *(u16*)(buffer_start+0), 0x0000); |
| // Set break flag |
| SET_BDA(break_flag, 0x80); |
| // Generate int 0x1b |
| struct bregs br; |
| memset(&br, 0, sizeof(br)); |
| br.flags = F_IF; |
| call16_int(0x1b, &br); |
| } |
| |
| static void |
| kbd_sysreq(int key_release) |
| { |
| // SysReq generates int 0x15/0x85 |
| struct bregs br; |
| memset(&br, 0, sizeof(br)); |
| br.ah = 0x85; |
| br.al = key_release ? 0x01 : 0x00; |
| br.flags = F_IF; |
| call16_int(0x15, &br); |
| } |
| |
| static void |
| kbd_prtscr(int key_release) |
| { |
| if (key_release) |
| return; |
| // PrtScr generates int 0x05 (ctrl-prtscr has keycode 0x7200?) |
| struct bregs br; |
| memset(&br, 0, sizeof(br)); |
| br.flags = F_IF; |
| call16_int(0x05, &br); |
| } |
| |
| // Handle a ps2 style scancode read from the keyboard. |
| static void |
| __process_key(u8 scancode) |
| { |
| // Check for multi-scancode key sequences |
| u8 flags1 = GET_BDA(kbd_flag1); |
| if (scancode == 0xe0 || scancode == 0xe1) { |
| // Start of two byte extended (e0) or three byte pause key (e1) sequence |
| u8 eflag = scancode == 0xe0 ? KF1_LAST_E0 : KF1_LAST_E1; |
| SET_BDA(kbd_flag1, flags1 | eflag); |
| return; |
| } |
| int key_release = scancode & 0x80; |
| scancode &= ~0x80; |
| if (flags1 & (KF1_LAST_E0|KF1_LAST_E1)) { |
| if (flags1 & KF1_LAST_E1 && scancode == 0x1d) |
| // Ignore second byte of pause key (e1 1d 45 / e1 9d c5) |
| return; |
| // Clear E0/E1 flag in memory for next key event |
| SET_BDA(kbd_flag1, flags1 & ~(KF1_LAST_E0|KF1_LAST_E1)); |
| } |
| |
| // Check for special keys |
| switch (scancode) { |
| case 0x3a: /* Caps Lock */ |
| kbd_set_flag(key_release, KF0_CAPS, 0, KF0_CAPSACTIVE); |
| return; |
| case 0x2a: /* L Shift */ |
| if (flags1 & KF1_LAST_E0) |
| // Ignore fake shifts |
| return; |
| kbd_set_flag(key_release, KF0_LSHIFT, 0, 0); |
| return; |
| case 0x36: /* R Shift */ |
| if (flags1 & KF1_LAST_E0) |
| // Ignore fake shifts |
| return; |
| kbd_set_flag(key_release, KF0_RSHIFT, 0, 0); |
| return; |
| case 0x1d: /* Ctrl */ |
| if (flags1 & KF1_LAST_E0) |
| kbd_set_flag(key_release, KF0_CTRLACTIVE, KF1_RCTRL, 0); |
| else |
| kbd_set_flag(key_release, KF0_CTRLACTIVE | KF0_LCTRL, 0, 0); |
| return; |
| case 0x38: /* Alt */ |
| if (flags1 & KF1_LAST_E0) |
| kbd_set_flag(key_release, KF0_ALTACTIVE, KF1_RALT, 0); |
| else |
| kbd_set_flag(key_release, KF0_ALTACTIVE | KF0_LALT, 0, 0); |
| return; |
| case 0x45: /* Num Lock */ |
| if (flags1 & KF1_LAST_E1) |
| // XXX - pause key. |
| return; |
| kbd_set_flag(key_release, KF0_NUM, 0, KF0_NUMACTIVE); |
| return; |
| case 0x46: /* Scroll Lock */ |
| if (flags1 & KF1_LAST_E0) { |
| kbd_ctrl_break(key_release); |
| return; |
| } |
| kbd_set_flag(key_release, KF0_SCROLL, 0, KF0_SCROLLACTIVE); |
| return; |
| |
| case 0x37: /* * */ |
| if (flags1 & KF1_LAST_E0) { |
| kbd_prtscr(key_release); |
| return; |
| } |
| break; |
| case 0x54: /* SysReq */ |
| kbd_sysreq(key_release); |
| return; |
| case 0x53: /* Del */ |
| if ((GET_BDA(kbd_flag0) & (KF0_CTRLACTIVE|KF0_ALTACTIVE)) |
| == (KF0_CTRLACTIVE|KF0_ALTACTIVE) && !key_release) { |
| // Ctrl+alt+del - reset machine. |
| SET_BDA(soft_reset_flag, 0x1234); |
| reset(); |
| } |
| break; |
| |
| default: |
| break; |
| } |
| |
| // Handle generic keys |
| if (key_release) |
| // ignore key releases |
| return; |
| if (!scancode || scancode >= ARRAY_SIZE(scan_to_keycode)) { |
| dprintf(1, "__process_key unknown scancode read: 0x%02x!\n", scancode); |
| return; |
| } |
| struct scaninfo *info = &scan_to_keycode[scancode]; |
| if (flags1 & KF1_LAST_E0 && (scancode == 0x1c || scancode == 0x35)) |
| info = (scancode == 0x1c ? &key_ext_enter : &key_ext_slash); |
| u16 flags0 = GET_BDA(kbd_flag0); |
| u16 keycode; |
| if (flags0 & KF0_ALTACTIVE) { |
| keycode = GET_GLOBAL(info->alt); |
| } else if (flags0 & KF0_CTRLACTIVE) { |
| keycode = GET_GLOBAL(info->control); |
| } else { |
| u8 useshift = flags0 & (KF0_RSHIFT|KF0_LSHIFT) ? 1 : 0; |
| u8 ascii = GET_GLOBAL(info->normal) & 0xff; |
| if ((flags0 & KF0_NUMACTIVE && scancode >= 0x47 && scancode <= 0x53) |
| || (flags0 & KF0_CAPSACTIVE && ascii >= 'a' && ascii <= 'z')) |
| // Numlock/capslock toggles shift on certain keys |
| useshift ^= 1; |
| if (useshift) |
| keycode = GET_GLOBAL(info->shift); |
| else |
| keycode = GET_GLOBAL(info->normal); |
| } |
| if (flags1 & KF1_LAST_E0 && scancode >= 0x47 && scancode <= 0x53) { |
| /* extended keys handling */ |
| if (flags0 & KF0_ALTACTIVE) |
| keycode = (scancode + 0x50) << 8; |
| else |
| keycode = (keycode & 0xff00) | 0xe0; |
| } |
| if (keycode) |
| enqueue_key(keycode); |
| } |
| |
| void |
| process_key(u8 key) |
| { |
| if (!CONFIG_KEYBOARD) |
| return; |
| |
| if (CONFIG_KBD_CALL_INT15_4F) { |
| // allow for keyboard intercept |
| struct bregs br; |
| memset(&br, 0, sizeof(br)); |
| br.eax = (0x4f << 8) | key; |
| br.flags = F_IF|F_CF; |
| call16_int(0x15, &br); |
| if (!(br.flags & F_CF)) |
| return; |
| key = br.eax; |
| } |
| __process_key(key); |
| } |