source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH25h_HDrvID.asm @ 170

Last change on this file since 170 was 170, checked in by krille_n_@…, 13 years ago

Changes to all parts of the project:

  • Minor size optimizations
  • Commented away some ALIGN JUMP_ALIGN directives in the Int13h handler (they are either in init procedures, procedures that are rarely called or are unnecessary due to conditional assembly)
  • Fixed what appears to be a typo in EBIOS.inc
File size: 1.8 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 succesfull, 1 if error
21;--------------------------------------------------------------------
22ALIGN JUMP_ALIGN
23AH25h_HandlerForGetDriveInformation:
24    mov     si, [bp+IDEPACK.intpack+INTPACK.bx]
25%ifdef USE_186
26    push    Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
27    ; Fall to AH25h_GetDriveInformationToBufferInESSI
28%else
29    call    AH25h_GetDriveInformationToBufferInESSI
30    jmp     Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
31%endif
32
33
34;--------------------------------------------------------------------
35; AH25h_GetDriveInformationToBufferInESSI
36;   Parameters:
37;       DS:DI:  Ptr to DPT (in RAMVARS segment)
38;       ES:SI:  Ptr to buffer to receive 512-byte drive information
39;   Returns with INTPACK:
40;       AH:     Int 13h return status
41;       CF:     0 if succesfull, 1 if error
42;   Corrupts registers:
43;       AL, BX, CX, DX
44;--------------------------------------------------------------------
45;ALIGN JUMP_ALIGN
46AH25h_GetDriveInformationToBufferInESSI:
47    push    es
48    push    bp
49    push    di
50    push    si
51
52    call    AccessDPT_GetDriveSelectByteToAL
53    mov     bh, al
54    eMOVZX  ax, BYTE [di+DPT.bIdevarsOffset]
55    xchg    bp, ax
56    call    Device_IdentifyToBufferInESSIwithDriveSelectByteInBH
57
58    pop     si
59    pop     di
60    pop     bp
61    pop     es
62    ret
Note: See TracBrowser for help on using the repository browser.