source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/BootVars.inc @ 61

Last change on this file since 61 was 3, checked in by aitotat, 14 years ago
File size: 1.3 KB
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1; File name     :   BootVars.inc
2; Project name  :   IDE BIOS
3; Created date  :   23.3.2010
4; Last update   :   9.4.2010
5; Author        :   Tomi Tilli
6; Description   :   Defines for BOOTVARS struct used by boot menu
7;                   and drive initialization.
8%ifndef BOOTVARS_INC
9%define BOOTVARS_INC
10
11
12; Boot Menu Information Table. These are generated for all XTIDE Universal
13; BIOS drives. Available only until boot is successfull.
14LEN_BOOTNFO_DRV     EQU     26      ; Bytes reserved for drive name
15struc BOOTNFO
16    .twSectCnt      resb    6       ; Total user addressable sectors
17    .szDrvName      resb    LEN_BOOTNFO_DRV+1   ; Drive name
18                    resb    1       ; Alignment
19endstruc
20
21
22; Pre-boot variables. These do not exist after successfull boot to OS.
23; Segment is always 0000h, same as BDA segment
24struc BOOTVARS
25                    resb    800h
26    .dwSys18h       resb    4       ;  800h, System INT 18h handler (Diskless boot, Boot failure)
27    .dwPostStack    resb    4       ;  804h, POST stack when entering INT 19h
28    .bMenuHotkey    resb    1       ;  808h, Boot Menu hotkey, zero if none pressed
29                    resb    3
30    .rgBootNfo      resb    73F4h   ;  80Ch, Array containing BOOTNFO structs
31    .rgbMnuStack:                   ; 7C00h and below, Boot Menu stack
32    .rgbAtaInfo:                    ; 7C00h, ATA Information for drive detection
33    .rgbBootSect    resb    512     ; 7C00h, Boot sector
34endstruc
35
36
37%endif ; BOOTVARS_INC
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