; ; Command & Conquer Red Alert(tm) ; Copyright 2025 Electronic Arts Inc. ; ; This program is free software: you can redistribute it and/or modify ; it under the terms of the GNU General Public License as published by ; the Free Software Foundation, either version 3 of the License, or ; (at your option) any later version. ; ; This program is distributed in the hope that it will be useful, ; but WITHOUT ANY WARRANTY; without even the implied warranty of ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ; GNU General Public License for more details. ; ; You should have received a copy of the GNU General Public License ; along with this program. If not, see <http://www.gnu.org/licenses/>. ; ;*************************************************************************** ;** C O N F I D E N T I A L --- W E S T W O O D S T U D I O S ** ;*************************************************************************** ;* * ;* Project Name : Hard/Critical Error Handler * ;* * ;* File Name : harderr.asm * ;* * ;* Programmer : Scott K. Bowen. * ;* * ;* Start Date : July 18, 1994 * ;* * ;* Last Update : July 26, 1994 [SKB] * ;* * ;*-------------------------------------------------------------------------* ;* Functions: * ;* Install_Hard_Error_Handler -- Setup for handling critical errors * ;* Remove_Hard_Erroror_Handler -- Remove the critical error handler stuff* ;* Critical_Error_Handler -- Catch critical error interrupt. * ;* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - * IDEAL P386 MODEL USE32 FLAT LOCALS ?? ;INCLUDE "tntdos.inc" ;////////////////////////////////////////////////////////////////////////////////////// ;///////////////////////////////////// Equates //////////////////////////////////////// DOS_SYS_CALL EQU 21h ; to do TNT DOS-XNDR system calls. LOCK_PAGES EQU 5 ; Lock pages subfunction using DX_MEM_MGT UNLOCK_PAGES EQU 6 ; Unlock pages subfunction using DX_MEM_MGT CRITERR_INT_NUM EQU 24h DISK_ERROR_BIT EQU 01000000000000000b ; bit 7 of dh. DISK_ERROR EQU 1 ; Value of Hard_Error_Occured if disk/floppy error. OTHER_ERROR EQU 2 ; Value of Hard_Error_Occured if other type of error. ; ; Interrupt handler stack frame ; _FLGS equ [DWORD PTR ebp+52] ; 386|DOS-Extender flags _GS equ [WORD PTR ebp+48] ; original GS _FS equ [WORD PTR ebp+44] ; original FS _DS equ [WORD PTR ebp+40] ; original DS _ES equ [WORD PTR ebp+36] ; original ES _SS equ [WORD PTR ebp+32] ; original SS _ESP equ [DWORD PTR ebp+28] ; original ESP _EFLAGS equ [DWORD PTR ebp+24] ; original EFLAGS _CS equ [DWORD PTR ebp+20] ; original CS _EIP equ [DWORD PTR ebp+16] ; original EIP _EBP equ [DWORD PTR ebp] ; original EBP ; ; DOS critical error stack frame ; _DOS_FLAGS equ [WORD PTR es:ebx+22] ; interrupt stack frame from real _DOS_CS equ [WORD PTR es:ebx+20] ; mode INT 21h _DOS_IP equ [WORD PTR es:ebx+18] ; _DOS_ES equ [WORD PTR es:ebx+16] ; regs at time INT 21h was issued _DOS_DS equ [WORD PTR es:ebx+14] ; in real mode _DOS_BP equ [WORD PTR es:ebx+12] ; _DOS_DI equ [WORD PTR es:ebx+10] ; _DOS_SI equ [WORD PTR es:ebx+8] ; _DOS_DX equ [WORD PTR es:ebx+6] ; _DOS_CX equ [WORD PTR es:ebx+4] ; _DOS_BX equ [WORD PTR es:ebx+2] ; _DOS_AX equ [WORD PTR es:ebx] ; ; ; Error codes put into Hard_Error_Code ; DISK_WRITE_PROTECTED equ 00h UNKOWN_DEVICE equ 01h DRIVE_NOT_READY equ 02h UNKOWN_COMMAND equ 03h CRC_ERROR equ 04h WRONG_DATA_LENGTH equ 05h SEEK_ERROR equ 06h UNKOWN_DEVICE_TYPE equ 07h SECTOR_NOT_FOUND equ 08h OUT_OF_PAPER equ 09h WRITE_ERROR equ 0Ah READ_ERROR equ 0Bh GENERAL_ERROR equ 0Ch ;////////////////////////////////////////////////////////////////////////////////////// ;/////////////////////////////////// Prototypes /////////////////////////////////////// GLOBAL Install_Hard_Error_Handler :NEAR GLOBAL Remove_Hard_Error_Handler :NEAR ;////////////////////////////////////////////////////////////////////////////////////// ;///////////////////////////////// Global/Local Data ////////////////////////////////// DATASEG LABEL LockedDataStart BYTE Hard_Error_Occured DB 0 ; Hard disk error or other error. Hard_Error_Code DB 0 ; Error Code. LABEL LockedDataEnd BYTE OldRMI DD ? ; original real mode critical err vector OldPMIOffset DD ? ; original protected mode critical err vector OldPMISelector DD ? ; original PM crit error selector. InitFlags DD 0 ; Flags to indicate what has been initialized. ; InitFlags that are set to have a fully functional interrupt. IF_SET_VECTORS equ 1 ; Vectors have been set. IF_LOCKED_PM_CODE equ 2 ; Locked PM code for DPMI. IF_LOCKED_PM_DATA equ 4 ; Locked PM data for DPMI. IF_FUNCTIONAL equ 8 ; crit error is in and functional. ;////////////////////////////////////////////////////////////////////////////////////// ;///////////////////////////////////// Code ////////////////////////////////////////// CODESEG ;*************************************************************************** ;* INSTALL_HARD_ERROR_HANDLER -- Setup for handling critical errors. * ;* * ;* * ;* * ;* INPUT: * ;* * ;* OUTPUT: * ;* * ;* WARNINGS: * ;* * ;* HISTORY: * ;* 07/26/1994 SKB : Created. * ;*=========================================================================* PROC Install_Hard_Error_Handler C near USES eax,ebx,ecx,ds,es ret ENDP Install_Hard_Error_Handler ;*************************************************************************** ;* REMOVE_HARD_ERROROR_HANDLER -- Remove the critical error handler stuff * ;* * ;* * ;* * ;* INPUT: * ;* * ;* OUTPUT: * ;* * ;* WARNINGS: * ;* * ;* HISTORY: * ;* 07/26/1994 SKB : Created. * ;*=========================================================================* PROC Remove_Hard_Error_Handler C near USES ebx,ecx,edx,ds,es ; ; Restore the original interrupt vectors and exit ; ret ENDP Remove_Hard_Error_Handler ;*************************************************************************** ;* Critical_Error_Handler -- Catch critical error interrupt. * ;* * ;* * ;* * ;* INPUT: * ;* * ;* OUTPUT: * ;* * ;* WARNINGS: * ;* * ;* HISTORY: * ;* 07/26/1994 SKB : Created. * ;*=========================================================================* LABEL LockedCodeStart BYTE PROC Critical_Error_Handler NEAR ENDP Critical_Error_Handler LABEL LockedCodeEnd BYTE END