source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH25h_HDrvID.asm @ 150

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

; Section containing code
SECTION .text

;--------------------------------------------------------------------
; Int 13h function AH=25h, Get Drive Information.
;
; AH25h_HandlerForGetDriveInformation
;   Parameters:
;       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:
;       ES:BX:  Ptr to buffer to receive 512-byte drive information
;   Returns with INTPACK:
;       AH:     Int 13h return status
;       CF:     0 if succesfull, 1 if error
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
AH25h_HandlerForGetDriveInformation:
    push    bp

    mov     si, [bp+IDEPACK.intpack+INTPACK.bx]
    call    AccessDPT_GetDriveSelectByteToAL
    mov     bh, al
    eMOVZX  ax, BYTE [di+DPT.bIdevarsOffset]
    xchg    bp, ax
    call    Device_IdentifyToBufferInESSIwithDriveSelectByteInBH

    pop     bp
    jmp     Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH