[392] | 1 | ; Project name : XTIDE Universal BIOS |
---|
| 2 | ; Description : Int 19h Handler (Boot Loader). |
---|
| 3 | |
---|
| 4 | ; |
---|
[526] | 5 | ; XTIDE Universal BIOS and Associated Tools |
---|
| 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team. |
---|
[392] | 7 | ; |
---|
| 8 | ; This program is free software; you can redistribute it and/or modify |
---|
| 9 | ; it under the terms of the GNU General Public License as published by |
---|
| 10 | ; the Free Software Foundation; either version 2 of the License, or |
---|
| 11 | ; (at your option) any later version. |
---|
[526] | 12 | ; |
---|
[392] | 13 | ; This program is distributed in the hope that it will be useful, |
---|
| 14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
| 15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
[526] | 16 | ; GNU General Public License for more details. |
---|
[392] | 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
---|
[526] | 18 | ; |
---|
[392] | 19 | |
---|
| 20 | ; Section containing code |
---|
| 21 | SECTION .text |
---|
| 22 | |
---|
| 23 | ;-------------------------------------------------------------------- |
---|
| 24 | ; INT 19h handler that properly reboots the computer when |
---|
| 25 | ; INT 19h is called. |
---|
| 26 | ; |
---|
| 27 | ; Int19hReset_Handler |
---|
| 28 | ; Parameters: |
---|
| 29 | ; Nothing |
---|
| 30 | ; Returns: |
---|
| 31 | ; Never returns (reboots computer) |
---|
| 32 | ;-------------------------------------------------------------------- |
---|
| 33 | Int19hReset_Handler: |
---|
[595] | 34 | ; Try to boot from drive A. |
---|
| 35 | ; This is needed if INT 19h is used to launch booter games while |
---|
| 36 | ; preserving interrupt vector table (for example to hook interrupt 10h) |
---|
| 37 | xor dx, dx ; Drive 00h |
---|
| 38 | call BootSector_LoadFirstSectorFromDriveDL |
---|
| 39 | jc SHORT .Reboot |
---|
| 40 | cmp WORD [bx+510], 0AA55h ; Valid boot sector? |
---|
[597] | 41 | je SHORT Int19h_JumpToBootSectorInESBXOrRomBootWithoutStackChange |
---|
[595] | 42 | |
---|
| 43 | ; Do warm reset since boot from floppy drive failed |
---|
| 44 | .Reboot: |
---|
[392] | 45 | mov ax, BOOT_FLAG_WARM ; Skip memory tests |
---|
| 46 | jmp Reboot_ComputerWithBootFlagInAX |
---|