source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH25h_HDrvID.asm @ 322

Last change on this file since 322 was 322, checked in by krille_n_@…, 12 years ago

Changes to XTIDE Universal BIOS:

  • Commented out the FS and GS segment registers from INTPACK since we never touch them anyway.
  • Minor changes to improve speed in the Int13h handler.
  • Changed Prepare_ByValidatingSectorsInALforOldInt13h so it really doesn't corrupt anything.
  • Changed the makefile so 'make strings' now works even if StringsCompressed.asm is missing or empty.
File size: 1.2 KB
Line 
1; Project name  :   XTIDE Universal BIOS
2; Description   :   Int 13h function AH=25h, Get Drive Information.
3
4; Section containing code
5SECTION .text
6
7;--------------------------------------------------------------------
8; Int 13h function AH=25h, Get Drive Information.
9;
10; AH25h_HandlerForGetDriveInformation
11;   Parameters:
12;       ES:     Same as in INTPACK
13;       DL:     Translated Drive number
14;       DS:DI:  Ptr to DPT (in RAMVARS segment)
15;       SS:BP:  Ptr to IDEPACK
16;   Parameters on INTPACK:
17;       ES:BX:  Ptr to buffer to receive 512-byte drive information
18;   Returns with INTPACK:
19;       AH:     Int 13h return status
20;       CF:     0 if successful, 1 if error
21;--------------------------------------------------------------------
22ALIGN JUMP_ALIGN
23AH25h_HandlerForGetDriveInformation:
24    mov     ax, (COMMAND_IDENTIFY_DEVICE << 8 | 1)      ; Read 1 sector
25    call    Prepare_BufferToESSIforOldInt13hTransfer    ; Preserves AX
26    mov     bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ)
27%ifdef USE_186
28    push    Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
29    jmp     Idepack_TranslateOldInt13hAddressAndIssueCommandFromAH
30%else
31    call    Idepack_TranslateOldInt13hAddressAndIssueCommandFromAH
32    jmp     Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
33%endif
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