source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH3h_HWrite.asm@ 162

Last change on this file since 162 was 158, checked in by Tomi Tilli, 14 years ago

Changes to XTIDE Universal BIOS:

  • Optimized few bytes.
File size: 1.6 KB
Line 
1; Project name : XTIDE Universal BIOS
2; Description : Int 13h function AH=3h, Write Disk Sectors.
3
4; Section containing code
5SECTION .text
6
7;--------------------------------------------------------------------
8; Int 13h function AH=3h, Write Disk Sectors.
9;
10; AH3h_HandlerForWriteDiskSectors
11; Parameters:
12; AL, CX, DH, ES: Same as in INTPACK
13; DL: Translated Drive number
14; DS:DI: Ptr to DPT (in RAMVARS segment)
15; SS:BP: Ptr to IDEREGS_AND_INTPACK
16; Parameters on INTPACK:
17; AL: Number of sectors to write
18; CH: Cylinder number, bits 7...0
19; CL: Bits 7...6: Cylinder number bits 9 and 8
20; Bits 5...0: Starting sector number (1...63)
21; DH: Starting head number (0...255)
22; ES:BX: Pointer to source data
23; Returns with INTPACK:
24; AH: Int 13h/40h floppy return status
25; CF: 0 if successfull, 1 if error
26;--------------------------------------------------------------------
27ALIGN JUMP_ALIGN
28AH3h_HandlerForWriteDiskSectors:
29 cmp BYTE [bp+IDEPACK.intpack+INTPACK.al], 0
30 je SHORT AH2h_ExitInt13hSinceSectorCountInIntpackIsZero
31
32 mov ah, COMMAND_WRITE_SECTORS ; Load sector mode command
33 test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_BLOCK_MODE_SUPPORTED
34 eCMOVNZ ah, COMMAND_WRITE_MULTIPLE ; Load block mode command
35 mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ)
36 mov si, [bp+IDEPACK.intpack+INTPACK.bx]
37%ifdef USE_186
38 push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
39 jmp Idepack_TranslateOldInt13hAddressAndIssueCommandFromAH
40%else
41 call Idepack_TranslateOldInt13hAddressAndIssueCommandFromAH
42 jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
43%endif
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