source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH25h_HDrvID.asm@ 252

Last change on this file since 252 was 221, checked in by aitotat@…, 13 years ago

Changes to XTIDE Universal BIOS:

  • AH=0Ch (Seek) should work properly again.
  • More than 127 sectors are no longer allowed for EBIOS functions.
  • Changed location for BOOTNFO structs.
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 al, 1 ; Read 1 sector
25 call Prepare_BufferToESSIforOldInt13hTransfer
26%ifdef USE_186
27 push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
28 ; Fall to AH25h_GetDriveInformationToBufferInESSI
29%else
30 call AH25h_GetDriveInformationToBufferInESSI
31 jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
32%endif
33
34
35;--------------------------------------------------------------------
36; AH25h_GetDriveInformationToBufferInESSI
37; Parameters:
38; DS:DI: Ptr to DPT (in RAMVARS segment)
39; ES:SI: Ptr to buffer to receive 512-byte drive information
40; Returns with INTPACK:
41; AH: Int 13h return status
42; CF: 0 if succesfull, 1 if error
43; Corrupts registers:
44; AL, BX, CX, DX
45;--------------------------------------------------------------------
46;ALIGN JUMP_ALIGN
47AH25h_GetDriveInformationToBufferInESSI:
48 push es
49 push bp
50 push di
51 push si
52
53 call AccessDPT_GetDriveSelectByteToAL
54 mov bh, al
55 eMOVZX ax, BYTE [di+DPT.bIdevarsOffset]
56 xchg bp, ax
57 call Device_IdentifyToBufferInESSIwithDriveSelectByteInBH
58
59 pop si
60 pop di
61 pop bp
62 pop es
63 ret
Note: See TracBrowser for help on using the repository browser.