source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH24h_HSetBlocks.asm@ 444

Last change on this file since 444 was 376, checked in by gregli@…, 12 years ago

WIDE checkin... Added copyright and license information to sorce files, as per the GPL instructions for usage.

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1; Project name : XTIDE Universal BIOS
2; Description : Int 13h function AH=24h, Set Multiple Blocks.
3
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
20; Section containing code
21SECTION .text
22
23;--------------------------------------------------------------------
24; Int 13h function AH=24h, Set Multiple Blocks.
25;
26; AH24h_HandlerForSetMultipleBlocks
27; Parameters:
28; AL: Same as in INTPACK
29; DL: Translated Drive number
30; DS:DI: Ptr to DPT (in RAMVARS segment)
31; SS:BP: Ptr to IDEPACK
32; Parameters on INTPACK:
33; AL: Number of Sectors per Block (1, 2, 4, 8, 16, 32, 64 or 128)
34; Returns with INTPACK:
35; AH: Int 13h return status
36; CF: 0 if successful, 1 if error
37;--------------------------------------------------------------------
38AH24h_HandlerForSetMultipleBlocks:
39%ifndef USE_186
40 call AH24h_SetBlockSize
41 jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
42%else
43 push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
44 ; Fall to AH24h_SetBlockSize
45%endif
46
47
48;--------------------------------------------------------------------
49; AH24h_SetBlockSize
50; Parameters:
51; AL: Number of Sectors per Block (1, 2, 4, 8, 16, 32, 64 or 128)
52; DS:DI: Ptr to DPT (in RAMVARS segment)
53; SS:BP: Ptr to IDEPACK
54; Returns:
55; AH: Int 13h return status
56; CF: 0 if successful, 1 if error
57; Corrupts registers:
58; AL, CX, DX
59;--------------------------------------------------------------------
60AH24h_SetBlockSize:
61 push bx
62
63 push ax
64 xchg dx, ax ; DL = Block size (Sector Count Register)
65 mov al, COMMAND_SET_MULTIPLE_MODE
66 mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRDY, FLG_STATUS_DRDY)
67 call Idepack_StoreNonExtParametersAndIssueCommandFromAL
68 pop bx
69 jnc SHORT .StoreBlockSize
70 mov bl, 1 ; Block size 1 will always work
71.StoreBlockSize: ; Store new block size to DPT and return
72 mov [di+DPT_ATA.bBlockSize], bl
73
74 pop bx
75 ret
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