source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH1h_HStatus.asm @ 294

; Project name  :   XTIDE Universal BIOS
; Description   :   Int 13h function AH=1h, Read Disk Status.

; Section containing code
SECTION .text

;--------------------------------------------------------------------
; Int 13h function AH=1h, Read Disk Status.
;
; AH1h_HandlerForReadDiskStatus
;   Parameters:
;       DL:     Translated Drive number
;       DS:DI:  Ptr to DPT (in RAMVARS segment)
;       SS:BP:  Ptr to IDEREGS_AND_INTPACK
;   Returns with INTPACK:
;       AH:     Int 13h floppy return status
;       CF:     0 if AH = RET_HD_SUCCESS, 1 otherwise (error)
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
AH1h_HandlerForReadDiskStatus:
    LOAD_BDA_SEGMENT_TO ds, ax, !

%ifdef MODULE_SERIAL_FLOPPY
    test    dl, dl
    js      .HardDisk
    mov     ah, [BDA.bFDRetST]  ; Unlike for hard disks below, floppy version does not clear the status
    jmp     .done
.HardDisk:
%endif

    xchg    ah, [BDA.bHDLastSt] ; Load and clear last error (AH is cleared with the LOAD_BDA_SEGMENT_TO above)

.done:
%ifndef USE_186
    call    Int13h_SetErrorCodeToIntpackInSSBPfromAH
    jmp     Int13h_ReturnFromHandlerWithoutStoringErrorCode
%else
    push    Int13h_ReturnFromHandlerWithoutStoringErrorCode
    jmp     Int13h_SetErrorCodeToIntpackInSSBPfromAH
%endif