| [392] | 1 | ; Project name : XTIDE Universal BIOS
|
|---|
| 2 | ; Description : Functions for accessings BOOTVARS.
|
|---|
| 3 |
|
|---|
| 4 | ;
|
|---|
| [491] | 5 | ; XTIDE Universal BIOS and Associated Tools
|
|---|
| [526] | 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.
|
|---|
| [491] | 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
|
|---|
| [491] | 16 | ; GNU General Public License for more details.
|
|---|
| [392] | 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
|
|---|
| [491] | 18 | ;
|
|---|
| [392] | 19 |
|
|---|
| 20 | ; Section containing code
|
|---|
| 21 | SECTION .text
|
|---|
| 22 |
|
|---|
| 23 | ;--------------------------------------------------------------------
|
|---|
| 24 | ; BootVars_Initialize
|
|---|
| 25 | ; Parameters:
|
|---|
| 26 | ; DS: RAMVARS Segment
|
|---|
| 27 | ; ES: BDA Segment
|
|---|
| 28 | ; Returns:
|
|---|
| 29 | ; Nothing
|
|---|
| 30 | ; Corrupts registers:
|
|---|
| 31 | ; AX, CX, DX, DI
|
|---|
| 32 | ;--------------------------------------------------------------------
|
|---|
| 33 | BootVars_Initialize:
|
|---|
| [524] | 34 | ; Clear all DRVDETECTINFO structs to zero
|
|---|
| [397] | 35 | mov al, DRVDETECTINFO_size
|
|---|
| [392] | 36 | mul BYTE [cs:ROMVARS.bIdeCnt]
|
|---|
| 37 | xchg cx, ax
|
|---|
| [528] | 38 | %ifndef MODULE_HOTKEYS
|
|---|
| [593] | 39 | mov di, BOOTVARS.rgDrvDetectInfo ; We must not initialize anything before this!
|
|---|
| [528] | 40 | jmp Memory_ZeroESDIwithSizeInCX
|
|---|
| [395] | 41 |
|
|---|
| [528] | 42 | %else ; if MODULE_HOTKEYS
|
|---|
| [593] | 43 | ; Also zero HOTKEYVARS located above DRVDETECTINFO structs
|
|---|
| 44 | mov di, BOOTVARS.hotkeyVars
|
|---|
| 45 | add cx, BYTE HOTKEYVARS_size
|
|---|
| [392] | 46 | call Memory_ZeroESDIwithSizeInCX
|
|---|
| [599] | 47 | jmp HotkeyBar_InitializeVariables
|
|---|
| [395] | 48 | %endif ; MODULE_HOTKEYS
|
|---|
| [547] | 49 |
|
|---|
| 50 |
|
|---|
| 51 | ;--------------------------------------------------------------------
|
|---|
| 52 | ; Returns letter for first hard disk. Usually it will be 'C' but it
|
|---|
| 53 | ; can be higher if more than two floppy drives are found.
|
|---|
| 54 | ;
|
|---|
| 55 | ; BootVars_GetLetterForFirstHardDriveToAX
|
|---|
| 56 | ; Parameters:
|
|---|
| 57 | ; DS: RAMVARS segment
|
|---|
| 58 | ; Returns:
|
|---|
| 59 | ; AX: Upper case letter for first hard disk
|
|---|
| 60 | ; Corrupts registers:
|
|---|
| 61 | ; Nothing
|
|---|
| 62 | ;--------------------------------------------------------------------
|
|---|
| 63 | BootVars_GetLetterForFirstHardDriveToAX:
|
|---|
| 64 | call FloppyDrive_GetCountToAX
|
|---|
| 65 | add al, DEFAULT_FLOPPY_DRIVE_LETTER ; First Hard Drive letter comes after last floppy drive letter...
|
|---|
| 66 | MAX_U al, DEFAULT_HARD_DRIVE_LETTER ; ...but it can never be 'A' or 'B'
|
|---|
| 67 | ret
|
|---|
