source: xtideuniversalbios/trunk/Assembly_Library/Src/Util/Reboot.asm@ 246

Last change on this file since 246 was 245, checked in by aitotat@…, 13 years ago

Changes to Assembly Library:

  • Added functions to reboot computer.
  • Added JMP_DELAY macro.
File size: 1.3 KB
Line 
1; Project name : Assembly Library
2; Description : Functions for rebooting computer.
3
4; Section containing code
5SECTION .text
6
7;--------------------------------------------------------------------
8; Reboot_ComputerWithBootFlagInAX
9; Parameters:
10; AX: Boot Flag
11; Returns:
12; Nothing, function never returns
13;--------------------------------------------------------------------
14Reboot_ComputerWithBootFlagInAX:
15 LOAD_BDA_SEGMENT_TO dx, bx
16 mov [BDA.wBoot], ax ; Store boot flag
17 ; Fall to Reboot_AT
18
19
20;--------------------------------------------------------------------
21; Reboot_AT
22; Parameters:
23; Nothing
24; Returns:
25; Nothing, function never returns
26;--------------------------------------------------------------------
27Reboot_AT:
28 mov al, 0FEh ; System reset (AT+ keyboard controller)
29 out 64h, al ; Reset computer (AT+)
30 mov al, 10
31 call Delay_MicrosecondsFromAX
32 ; Fall to Reboot_XT
33
34
35;--------------------------------------------------------------------
36; Reboot_XT
37; Parameters:
38; Nothing
39; Returns:
40; Nothing, function never returns
41;--------------------------------------------------------------------
42Reboot_XT:
43 xor ax, ax
44 push ax
45 popf ; Clear FLAGS (disables interrupt)
46 mov ds, ax
47 mov es, ax
48 mov ss, ax
49 jmp WORD 0FFFFh:0h ; XT reset
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