| [116] | 1 | ; Project name : XTIDE Universal BIOS
|
|---|
| [3] | 2 | ; Description : Int 13h function AH=Ch, Seek.
|
|---|
| 3 |
|
|---|
| [376] | 4 | ;
|
|---|
| 5 | ; XTIDE Universal BIOS and Associated Tools
|
|---|
| 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
|
|---|
| 7 | ;
|
|---|
| 8 | ; This program is free software; you can redistribute it and/or modify
|
|---|
| 9 | ; it under the terms of the GNU General Public License as published by
|
|---|
| 10 | ; the Free Software Foundation; either version 2 of the License, or
|
|---|
| 11 | ; (at your option) any later version.
|
|---|
| 12 | ;
|
|---|
| 13 | ; This program is distributed in the hope that it will be useful,
|
|---|
| 14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|---|
| 16 | ; GNU General Public License for more details.
|
|---|
| 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
|
|---|
| 18 | ;
|
|---|
| 19 |
|
|---|
| [3] | 20 | ; Section containing code
|
|---|
| 21 | SECTION .text
|
|---|
| 22 |
|
|---|
| 23 | ;--------------------------------------------------------------------
|
|---|
| 24 | ; Int 13h function AH=Ch, Seek.
|
|---|
| 25 | ;
|
|---|
| 26 | ; AHCh_HandlerForSeek
|
|---|
| 27 | ; Parameters:
|
|---|
| [148] | 28 | ; CX, DH: Same as in INTPACK
|
|---|
| 29 | ; DL: Translated Drive number
|
|---|
| 30 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| [150] | 31 | ; SS:BP: Ptr to IDEREGS_AND_INTPACK
|
|---|
| 32 | ; Parameters on INTPACK:
|
|---|
| [3] | 33 | ; CH: Cylinder number, bits 7...0
|
|---|
| 34 | ; CL: Bits 7...6: Cylinder number bits 9 and 8
|
|---|
| 35 | ; Bits 5...0: Starting sector number (1...63)
|
|---|
| 36 | ; DH: Starting head number (0...255)
|
|---|
| [150] | 37 | ; Returns with INTPACK:
|
|---|
| [3] | 38 | ; AH: BIOS Error code
|
|---|
| [294] | 39 | ; CF: 0 if successful, 1 if error
|
|---|
| [3] | 40 | ;--------------------------------------------------------------------
|
|---|
| 41 | ALIGN JUMP_ALIGN
|
|---|
| 42 | AHCh_HandlerForSeek:
|
|---|
| [84] | 43 | %ifndef USE_186
|
|---|
| [3] | 44 | call AHCh_SeekToCylinder
|
|---|
| [148] | 45 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
|
|---|
| [84] | 46 | %else
|
|---|
| [148] | 47 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
|
|---|
| [162] | 48 | ; Fall to AHCh_SeekToCylinder
|
|---|
| [84] | 49 | %endif
|
|---|
| [3] | 50 |
|
|---|
| 51 | ;--------------------------------------------------------------------
|
|---|
| 52 | ; AHCh_SeekToCylinder
|
|---|
| 53 | ; Parameters:
|
|---|
| 54 | ; CH: Cylinder number, bits 7...0
|
|---|
| 55 | ; CL: Bits 7...6: Cylinder number bits 9 and 8
|
|---|
| 56 | ; Bits 5...0: Starting sector number (1...63)
|
|---|
| 57 | ; DH: Starting head number (0...255)
|
|---|
| [148] | 58 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
|
|---|
| [150] | 59 | ; SS:BP: Ptr to IDEREGS_AND_INTPACK
|
|---|
| [3] | 60 | ; Returns:
|
|---|
| 61 | ; AH: BIOS Error code
|
|---|
| [294] | 62 | ; CF: 0 if successful, 1 if error
|
|---|
| [3] | 63 | ; Corrupts registers:
|
|---|
| 64 | ; AL, BX, CX, DX
|
|---|
| 65 | ;--------------------------------------------------------------------
|
|---|
| 66 | AHCh_SeekToCylinder:
|
|---|
| [150] | 67 | mov ah, COMMAND_SEEK
|
|---|
| 68 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRDY)
|
|---|
| 69 | jmp Idepack_TranslateOldInt13hAddressAndIssueCommandFromAH
|
|---|
