source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH25h_HDrvID.asm @ 613

; Project name  :   XTIDE Universal BIOS
; Description   :   Int 13h function AH=25h, Get Drive Information.

;
; XTIDE Universal BIOS and Associated Tools
; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team.
;
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2 of the License, or
; (at your option) any later version.
;
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
; GNU General Public License for more details.
; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
;

; Section containing code
SECTION .text

;--------------------------------------------------------------------
; Int 13h function AH=25h, Get Drive Information.
;
; AH25h_HandlerForGetDriveInformation
;   Parameters:
;       CX, ES: Same as in INTPACK
;       DL:     Translated Drive number
;       DS:DI:  Ptr to DPT (in RAMVARS segment)
;       SS:BP:  Ptr to IDEPACK
;   Parameters on INTPACK:
;       CX:     XUB_INT13h_SIGNATURE to ignore illegal ATA-ID values, otherwise
;               correct them (only used if NOT build with NO_ATAID_CORRECTION)
;       ES:BX:  Ptr to buffer to receive 512-byte drive information
;   Returns with INTPACK:
;       AH:     Int 13h return status
;       CF:     0 if successful, 1 if error
;--------------------------------------------------------------------
AH25h_HandlerForGetDriveInformation:
    mov     ax, (COMMAND_IDENTIFY_DEVICE << 8 | 1)      ; Read 1 sector
    call    Prepare_BufferToESSIforOldInt13hTransfer    ; Preserves AX
    mov     bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ)
%ifdef USE_186
    push    Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
    jmp     Idepack_TranslateOldInt13hAddressAndIssueCommandFromAH
%else
    call    Idepack_TranslateOldInt13hAddressAndIssueCommandFromAH
    jmp     Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
%endif