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https://github.com/reactos/reactos.git
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117 lines
3.2 KiB
C
117 lines
3.2 KiB
C
/*
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* COPYRIGHT: GPL - See COPYING in the top level directory
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* PROJECT: ReactOS Virtual DOS Machine
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* FILE: dos.h
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* PURPOSE: VDM DOS Kernel (header file)
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* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
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*/
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#ifndef _DOS_H_
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#define _DOS_H_
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/* INCLUDES *******************************************************************/
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#include "ntvdm.h"
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/* DEFINES ********************************************************************/
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#define DOS_VERSION MAKEWORD(6, 0)
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#define DOS_CONFIG_PATH L"%SystemRoot%\\system32\\CONFIG.NT"
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#define DOS_COMMAND_INTERPRETER L"%SystemRoot%\\system32\\COMMAND.COM /k %SystemRoot%\\system32\\AUTOEXEC.NT"
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#define FIRST_MCB_SEGMENT 0x1000
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#define USER_MEMORY_SIZE 0x8FFF
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#define SYSTEM_PSP 0x08
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#define SYSTEM_ENV_BLOCK 0x800
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#define INVALID_DOS_HANDLE 0xFFFF
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#define DOS_INPUT_HANDLE 0
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#define DOS_OUTPUT_HANDLE 1
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#define DOS_ERROR_HANDLE 2
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#define DOS_SFT_SIZE 255
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#define SEGMENT_TO_MCB(seg) ((PDOS_MCB)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), 0)))
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#define SEGMENT_TO_PSP(seg) ((PDOS_PSP)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), 0)))
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#define UMB_START_SEGMENT 0xC000
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#define UMB_END_SEGMENT 0xDFFF
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#pragma pack(push, 1)
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typedef struct _DOS_MCB
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{
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CHAR BlockType;
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WORD OwnerPsp;
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WORD Size;
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BYTE Unused[3];
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CHAR Name[8];
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} DOS_MCB, *PDOS_MCB;
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typedef struct _DOS_FCB
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{
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BYTE DriveNumber;
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CHAR FileName[8];
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CHAR FileExt[3];
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WORD BlockNumber;
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WORD RecordSize;
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DWORD FileSize;
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WORD LastWriteDate;
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WORD LastWriteTime;
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BYTE Reserved[8];
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BYTE BlockRecord;
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BYTE RecordNumber[3];
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} DOS_FCB, *PDOS_FCB;
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typedef struct _DOS_PSP
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{
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BYTE Exit[2];
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WORD LastParagraph;
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BYTE Reserved0[6];
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DWORD TerminateAddress;
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DWORD BreakAddress;
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DWORD CriticalAddress;
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WORD ParentPsp;
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BYTE HandleTable[20];
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WORD EnvBlock;
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DWORD LastStack;
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WORD HandleTableSize;
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DWORD HandleTablePtr;
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DWORD PreviousPsp;
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DWORD Reserved1;
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WORD DosVersion;
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BYTE Reserved2[14];
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BYTE FarCall[3];
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BYTE Reserved3[9];
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DOS_FCB Fcb;
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BYTE CommandLineSize;
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CHAR CommandLine[127];
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} DOS_PSP, *PDOS_PSP;
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typedef struct _DOS_INPUT_BUFFER
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{
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BYTE MaxLength, Length;
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CHAR Buffer[ANYSIZE_ARRAY];
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} DOS_INPUT_BUFFER, *PDOS_INPUT_BUFFER;
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#pragma pack(pop)
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/* FUNCTIONS ******************************************************************/
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WORD DosAllocateMemory(WORD Size, WORD *MaxAvailable);
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BOOLEAN DosResizeMemory(WORD BlockData, WORD NewSize, WORD *MaxAvailable);
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BOOLEAN DosFreeMemory(WORD BlockData);
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WORD DosCreateFile(LPWORD Handle, LPCSTR FilePath, WORD Attributes);
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WORD DosOpenFile(LPWORD Handle, LPCSTR FilePath, BYTE AccessMode);
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WORD DosReadFile(WORD FileHandle, LPVOID Buffer, WORD Count, LPWORD BytesRead);
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WORD DosWriteFile(WORD FileHandle, LPVOID Buffer, WORD Count, LPWORD BytesWritten);
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VOID DosInitializePsp(WORD PspSegment, LPCSTR CommandLine, WORD ProgramSize, WORD Environment);
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BOOLEAN DosCreateProcess(LPCSTR CommandLine, WORD EnvBlock);
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VOID DosTerminateProcess(WORD Psp, BYTE ReturnCode);
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CHAR DosReadCharacter();
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VOID DosPrintCharacter(CHAR Character);
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VOID DosInt20h(WORD CodeSegment);
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VOID DosInt21h(WORD CodeSegment);
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VOID DosBreakInterrupt();
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BOOLEAN DosInitialize();
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#endif
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/* EOF */
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