source: xtideuniversalbios/trunk/Assembly_Library/Src/File/DosCritical.asm @ 592

Last change on this file since 592 was 592, checked in by krille_n_, 6 years ago

Changes:

  • The problem with NASM in the previous revision (r591) has been fixed.
  • The colors used by the boot menu and hotkey bar can now be customized by selecting one of a number of pre-defined color themes. Suggestions for additional themes are more than welcome!
  • Large builds are now 10 KB. Small builds are still 8 KB with the exception of the Tiny build which is now 4 KB. In other words, builds are now as small as possible to make it easier to combine them with other BIOSes.
  • Added code to the library to improve drive error handling. XTIDECFG can now handle "Drive Not Ready" errors.
  • Fixed a couple of potential bugs in AtaID.asm (AtaID_GetMaxPioModeToAXandMinCycleTimeToCX); 1) ATA1.bPioMode was treated as a WORD variable. 2) ATA2.bPIOSupp was assumed to be non-zero which would result in PIO mode 3 being returned if the assumption was wrong.
  • Made the same changes in the equivalent function used by BIOSDRVS (DisplayPioModeInformationUsingAtaInfoFromDSBX in AtaInfo.asm).
  • Fixed a bug from r587 in PDC20x30.asm in PDC20x30_GetMaxPioModeToALandMinPioCycleTimeToBX.
  • Fixed a bug from r523 in XTIDECFG where Auto Configure would only set the IRQ on one IDE interface on AT-builds.
  • XTIDECFG will now restore the default settings for the "Serial port virtual device" when reselecting it in the list of device types. This makes it behave consistently for all device types.
  • The eAAM macro is now used regardless if USE_UNDOC_INTEL is defined or not because it is apparently supported on all processors including the NEC V20/V30 CPUs.
  • Renamed the EXCLUDE_FROM_XTIDE_UNIVERSAL_BIOS define to EXCLUDE_FROM_XUB.
  • Added a define to exclude unused library code from BIOSDRVS (EXCLUDE_FROM_BIOSDRVS). This makes it a lot smaller than in previous revisions.
  • All unnecessary CLD-instructions are now under a new define 'CLD_NEEDED' which is only enabled for the BIOS. It is disabled for XTIDECFG and BIOSDRVS but can be enabled if needed by adding this define to the respective makefile. This change was made because these unnecessary instructions are wasteful and should never be needed. In fact, they only serve to hide bugs (in other peoples code) which I strongly believe should be avoided. I recommend people making their own BIOSes from source to not use this define as it's extremely unlikely to be needed.
  • Updated the copyright info in SerDrive and changed an URL to point to the new site.
  • Updated the copyright info and version number in BIOSDRVS.
  • Updated the copyright info in XTIDECFG.
  • Optimizations in general.
File size: 3.3 KB
Line 
1; Project name  :   Assembly Library
2; Description   :   DOS Critical Error Handler (24h) replacements.
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; Note! Only DOS functions 01h - 0Ch, 30h and 59h can be called from a Critical Error Handler.
21
22; DOS Critical Error Handler return values
23struc CRITICAL_ERROR_ACTION
24    .ignoreErrorAndContinueProcessingRequest    resb    1
25    .retryOperation                             resb    1
26    .terminateProgramAsThoughInt21hAH4ChCalled  resb    1
27    .failSystemCallInProgress                   resb    1   ; Needs DOS 3.1+
28endstruc
29
30
31; Section containing code
32SECTION .text
33
34;--------------------------------------------------------------------
35; DosCritical_InstallNewHandlerFromCSDX
36;   Parameters:
37;       CS:DX:  New Critical Error Handler
38;   Returns:
39;       Nothing
40;   Corrupts registers:
41;       AX
42;--------------------------------------------------------------------
43ALIGN JUMP_ALIGN
44DosCritical_InstallNewHandlerFromCSDX:
45    push    ds
46
47    push    cs
48    pop     ds
49    mov     ax, (SET_INTERRUPT_VECTOR<<8) | DOS_CRITICAL_ERROR_HANDLER_24h
50    int     DOS_INTERRUPT_21h
51
52    pop     ds
53    ret
54
55
56;--------------------------------------------------------------------
57; DosCritical_RestoreDosHandler
58;   Parameters:
59;       Nothing
60;   Returns:
61;       Nothing
62;   Corrupts registers:
63;       Nothing
64;--------------------------------------------------------------------
65ALIGN JUMP_ALIGN
66DosCritical_RestoreDosHandler:
67    push    ds
68    push    dx
69    push    ax
70
71    lds     dx, [cs:PSP.fpInt24hCriticalError]
72    mov     ax, (SET_INTERRUPT_VECTOR<<8) | DOS_CRITICAL_ERROR_HANDLER_24h
73    int     DOS_INTERRUPT_21h
74
75    pop     ax
76    pop     dx
77    pop     ds
78    ret
79
80
81;--------------------------------------------------------------------
82; DosCritical_CustomHandler
83;   Parameters:
84;       Nothing
85;   Returns:
86;       Nothing
87;   Corrupts registers:
88;       Nothing
89;--------------------------------------------------------------------
90ALIGN JUMP_ALIGN
91DosCritical_CustomHandler:
92    add     sp, 6   ; Remove the INT 24h return address and flags from stack
93
94    mov     ah, GET_EXTENDED_ERROR_INFORMATION  ; Requires DOS 3.0+
95    xor     bx, bx
96    int     DOS_INTERRUPT_21h
97    mov     [cs:bLastCriticalError], al
98
99    pop     ax
100    pop     bx
101    pop     cx
102    pop     dx
103    pop     si
104    pop     di
105    pop     bp
106    pop     ds
107    pop     es
108    iret            ; Return from the INT 21h call
109
110bLastCriticalError:     db  0
111
112
113;--------------------------------------------------------------------
114; DosCritical_HandlerToIgnoreAllErrors
115;   Parameters:
116;       Nothing
117;   Returns:
118;       AL:     CRITICAL_ERROR_ACTION
119;   Corrupts registers:
120;       Nothing
121;--------------------------------------------------------------------
122ALIGN JUMP_ALIGN
123DosCritical_HandlerToIgnoreAllErrors:
124    mov     al, CRITICAL_ERROR_ACTION.ignoreErrorAndContinueProcessingRequest
125    iret
126
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