source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeError.asm@ 566

Last change on this file since 566 was 566, checked in by krille_n_@…, 11 years ago

Changes to XTIDE Universal BIOS:

  • Fixed a very old bug (from r150) in IdeError.asm where GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX would return RET_HD_SEEK_FAIL instead of RET_HD_STATUSERR.
  • Optimizations and other fixes.
File size: 3.5 KB
Line 
1; Project name : XTIDE Universal BIOS
2; Description : IDE Device error functions.
3
4;
5; XTIDE Universal BIOS and Associated Tools
6; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 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; IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL
25; Parameters:
26; AL: IDE Status Register contents
27; DS:DI: Ptr to DPT (in RAMVARS segment)
28; Returns:
29; AH: BIOS error code
30; CF: Set if error
31; Cleared if no error
32; Corrupts registers:
33; AL, BX, DX
34;--------------------------------------------------------------------
35ALIGN JUMP_ALIGN
36IdeError_GetBiosErrorCodeToAHfromPolledStatusRegisterInAL:
37 mov ah, al ; IDE Status Register to AH
38 INPUT_TO_AL_FROM_IDE_REGISTER ERROR_REGISTER_in
39 xchg al, ah ; Status Register now in AL, Error Register now in AH
40 ; Fall to GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX
41
42
43;--------------------------------------------------------------------
44; GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX
45; Parameters:
46; AL: IDE Status Register contents
47; AH: IDE Error Register contents
48; Returns:
49; AH: BIOS INT 13h error code
50; CF: Set if error
51; Cleared if no error
52; Corrupts registers:
53; BX
54;--------------------------------------------------------------------
55ALIGN JUMP_ALIGN
56GetBiosErrorCodeToAHfromStatusAndErrorRegistersInAX:
57 test al, FLG_STATUS_BSY | FLG_STATUS_DF | FLG_STATUS_CORR | FLG_STATUS_ERR ; Clears CF
58 jnz SHORT .CheckErrorBitsFromStatusRegisterInAL
59 ; The MSB of AL (FLG_STATUS_BSY) is cleared at this point.
60 cbw ; No errors, zero AH (CF already cleared)
61 ret
62
63ALIGN JUMP_ALIGN
64.CheckErrorBitsFromStatusRegisterInAL:
65 js SHORT .Flg_Status_Bsy ; Jump if FLG_STATUS_BSY
66 test al, FLG_STATUS_ERR ; Error specified in Error register?
67 jnz SHORT .ConvertBiosErrorToAHfromErrorRegisterInAH
68 mov ah, RET_HD_ECC ; Assume ECC corrected error
69 test al, FLG_STATUS_CORR ; ECC corrected error?
70 jnz SHORT .ReturnBiosErrorCodeInAH
71 mov ah, RET_HD_CONTROLLER ; Must be Device Fault
72 SKIP2B bx
73.Flg_Status_Bsy:
74 mov ah, RET_HD_TIMEOUT
75.ReturnBiosErrorCodeInAH:
76 stc
77 ret
78
79.ConvertBiosErrorToAHfromErrorRegisterInAH:
80 stc ; Needed in case Error register (AH) is zero
81 mov bx, .rgbRetCodeLookup-1
82.ErrorBitLoop:
83 inc bx
84 rcr ah, 1
85 jnc SHORT .ErrorBitLoop ; CF will be set eventually
86 mov ah, [cs:bx]
87 ret
88
89
90.rgbRetCodeLookup:
91 db RET_HD_ADDRMARK ; Bit0=AMNF, Address Mark Not Found
92 db RET_HD_SEEK_FAIL ; Bit1=TK0NF, Track 0 Not Found
93 db RET_HD_INVALID ; Bit2=ABRT, Aborted Command
94 db RET_HD_NOTLOCKED ; Bit3=MCR, Media Change Requested
95 db RET_HD_NOT_FOUND ; Bit4=IDNF, ID Not Found
96 db RET_HD_LOCKED ; Bit5=MC, Media Changed
97 db RET_HD_UNCORRECC ; Bit6=UNC, Uncorrectable Data Error
98 db RET_HD_BADSECTOR ; Bit7=BBK, Bad Block Detected
99 db RET_HD_STATUSERR ; When Error Register is zero
Note: See TracBrowser for help on using the repository browser.