subsystems/ntvdm/dos.h

   1 /*
   2  * COPYRIGHT:       GPL - See COPYING in the top level directory
   3  * PROJECT:         ReactOS Virtual DOS Machine
   4  * FILE:            dos.h
   5  * PURPOSE:         VDM DOS Kernel (header file)
   6  * PROGRAMMERS:     Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
   7  */
   8
   9 #ifndef _DOS_H_
  10 #define _DOS_H_
  11
  12 /* INCLUDES *******************************************************************/
  13
  14 #include "ntvdm.h"
  15
  16 /* DEFINES ********************************************************************/
  17
  18 #define DOS_VERSION MAKEWORD(6, 0)
  19 #define DOS_CONFIG_PATH L"%SystemRoot%\\system32\\CONFIG.NT"
  20 #define DOS_COMMAND_INTERPRETER L"%SystemRoot%\\system32\\COMMAND.COM /k %SystemRoot%\\system32\\AUTOEXEC.NT"
  21 #define FIRST_MCB_SEGMENT 0x1000
  22 #define USER_MEMORY_SIZE 0x8FFFF
  23 #define SYSTEM_PSP 0x08
  24 #define SYSTEM_ENV_BLOCK 0x800
  25 #define SEGMENT_TO_MCB(seg) ((PDOS_MCB)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), 0)))
  26 #define SEGMENT_TO_PSP(seg) ((PDOS_PSP)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), 0)))
  27
  28 #pragma pack(push, 1)
  29
  30 typedef struct _DOS_MCB
  31 {
  32     CHAR BlockType;
  33     WORD OwnerPsp;
  34     WORD Size;
  35     BYTE Unused[3];
  36     CHAR Name[8];
  37 } DOS_MCB, *PDOS_MCB;
  38
  39 typedef struct _DOS_FCB
  40 {
  41     BYTE DriveNumber;
  42     CHAR FileName[8];
  43     CHAR FileExt[3];
  44     WORD BlockNumber;
  45     WORD RecordSize;
  46     DWORD FileSize;
  47     WORD LastWriteDate;
  48     WORD LastWriteTime;
  49     BYTE Reserved[8];
  50     BYTE BlockRecord;
  51     BYTE RecordNumber[3];
  52 } DOS_FCB, *PDOS_FCB;
  53
  54 typedef struct _DOS_PSP
  55 {
  56     BYTE Exit[2];
  57     WORD MemSize;
  58     BYTE Reserved0[6];
  59     DWORD TerminateAddress;
  60     DWORD BreakAddress;
  61     DWORD CriticalAddress;
  62     WORD ParentPsp;
  63     BYTE HandleTable[20];
  64     WORD EnvBlock;
  65     DWORD LastStack;
  66     WORD HandleTableSize;
  67     DWORD HandleTablePtr;
  68     DWORD PreviousPsp;
  69     DWORD Reserved1;
  70     WORD DosVersion;
  71     BYTE Reserved2[14];
  72     BYTE FarCall[3];
  73     BYTE Reserved3[9];
  74     DOS_FCB Fcb;
  75     BYTE CommandLineSize;
  76     CHAR CommandLine[127];
  77 } DOS_PSP, *PDOS_PSP;
  78
  79 typedef struct _DOS_SFT_ENTRY
  80 {
  81     WORD ReferenceCount;
  82     WORD Mode;
  83     BYTE Attribute;
  84     WORD DeviceInfo;
  85     DWORD DriveParamBlock;
  86     WORD FirstCluster;
  87     WORD FileTime;
  88     WORD FileDate;
  89     DWORD FileSize;
  90     DWORD CurrentOffset;
  91     WORD LastClusterAccessed;
  92     DWORD DirEntSector;
  93     BYTE DirEntryIndex;
  94     CHAR FileName[11];
  95     BYTE Reserved0[6];
  96     WORD OwnerPsp;
  97     BYTE Reserved1[8];
  98 } DOS_SFT_ENTRY, *PDOS_SFT_ENTRY;
  99
 100 typedef struct _DOS_SFT
 101 {
 102     DWORD NextTablePtr;
 103     WORD FileCount;
 104     DOS_SFT_ENTRY Entry[ANYSIZE_ARRAY];
 105 } DOS_SFT, *PDOS_SFT;
 106
 107 typedef struct _DOS_INPUT_BUFFER
 108 {
 109     BYTE MaxLength, Length;
 110     CHAR Buffer[ANYSIZE_ARRAY];
 111 } DOS_INPUT_BUFFER, *PDOS_INPUT_BUFFER;
 112
 113 #pragma pack(pop)
 114
 115 /* FUNCTIONS ******************************************************************/
 116
 117 WORD DosAllocateMemory(WORD Size, WORD *MaxAvailable);
 118 BOOLEAN DosResizeMemory(WORD BlockData, WORD NewSize, WORD *MaxAvailable);
 119 BOOLEAN DosFreeMemory(WORD BlockData);
 120 VOID DosInitializePsp(WORD PspSegment, LPCSTR CommandLine, WORD ProgramSize, WORD Environment);
 121 BOOLEAN DosCreateProcess(LPCSTR CommandLine, WORD EnvBlock);
 122 VOID DosTerminateProcess(WORD Psp, BYTE ReturnCode);
 123 CHAR DosReadCharacter();
 124 VOID DosPrintCharacter(CHAR Character);
 125 VOID DosInt20h(WORD CodeSegment);
 126 VOID DosInt21h(WORD CodeSegment);
 127 VOID DosBreakInterrupt();
 128 BOOLEAN DosInitialize();
 129
 130 #endif
 131
 132 /* EOF */
 133