+++ /dev/null
-/*
- * COPYRIGHT: GPL - See COPYING in the top level directory
- * PROJECT: ReactOS Virtual DOS Machine
- * FILE: subsystems/mvdm/ntvdm/dos/dos32krnl/bios.c
- * PURPOSE: DOS32 Bios
- * PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
- */
-
-/* INCLUDES *******************************************************************/
-
-#include "ntvdm.h"
-
-#define NDEBUG
-#include <debug.h>
-
-#include "emulator.h"
-#include "int32.h"
-
-#include "../dem.h"
-#include "dos.h"
-#include "dosfiles.h"
-#include "handle.h"
-#include "memory.h"
-#include "bios/bios.h"
-
-// This is needed because on UNICODE this symbol is redirected to
-// GetEnvironmentStringsW whereas on ANSI it corresponds to the real
-// "ANSI" function (and GetEnvironmentStringsA is aliased to it).
-#undef GetEnvironmentStrings
-
-// Symmetrize the dumbness of the previous symbol: on UNICODE
-// FreeEnvironmentStrings aliases to FreeEnvironmentStringsW but
-// on "ANSI" FreeEnvironmentStrings aliases to FreeEnvironmentStringsA
-#undef FreeEnvironmentStrings
-#define FreeEnvironmentStrings FreeEnvironmentStringsA
-
-/* PRIVATE VARIABLES **********************************************************/
-
-/* PUBLIC VARIABLES ***********************************************************/
-
-/* Global DOS BIOS data area */
-PBIOS_DATA BiosData;
-
-/* PRIVATE FUNCTIONS **********************************************************/
-
-/* PUBLIC FUNCTIONS ***********************************************************/
-
-VOID DosEchoCharacter(CHAR Character)
-{
- switch (Character)
- {
- case '\0':
- {
- /* Nothing */
- break;
- }
-
- case '\b':
- {
- /* Erase the character */
- DosPrintCharacter(DOS_OUTPUT_HANDLE, '\b');
- DosPrintCharacter(DOS_OUTPUT_HANDLE, ' ');
- DosPrintCharacter(DOS_OUTPUT_HANDLE, '\b');
- break;
- }
-
- default:
- {
- /*
- * Check if this is a special character
- * NOTE: \r and \n are handled by the underlying driver!
- */
- if (Character < 0x20 && Character != '\r' && Character != '\n')
- {
- DosPrintCharacter(DOS_OUTPUT_HANDLE, '^');
- Character += 'A' - 1;
- }
-
- /* Echo the character */
- DosPrintCharacter(DOS_OUTPUT_HANDLE, Character);
- }
- }
-}
-
-CHAR DosReadCharacter(WORD FileHandle, BOOLEAN Echo)
-{
- WORD BytesRead;
- PDOS_FILE_DESCRIPTOR Descriptor = NULL;
- WORD OldDeviceInfo;
-
- /* Find the standard input descriptor and switch it to binary mode */
- Descriptor = DosGetHandleFileDescriptor(FileHandle);
- if (Descriptor)
- {
- OldDeviceInfo = Descriptor->DeviceInfo;
- Descriptor->DeviceInfo |= FILE_INFO_BINARY;
- }
-
- Sda->ByteBuffer = '\0';
- DPRINT("DosReadCharacter\n");
-
- /* Use the file reading function */
- DosReadFile(FileHandle,
- MAKELONG(DOS_DATA_OFFSET(Sda.ByteBuffer), DOS_DATA_SEGMENT),
- 1,
- &BytesRead);
-
- /* Check if we should echo and the file is actually the CON device */
- if (Echo && Descriptor && Descriptor->DeviceInfo & FILE_INFO_DEVICE)
- {
- /* Echo the character */
- DosEchoCharacter(Sda->ByteBuffer);
- }
-
- /* Restore the old mode and return the character */
- if (Descriptor) Descriptor->DeviceInfo = OldDeviceInfo;
- return Sda->ByteBuffer;
-}
-
-BOOLEAN DosCheckInput(VOID)
-{
- PDOS_FILE_DESCRIPTOR Descriptor = DosGetHandleFileDescriptor(DOS_INPUT_HANDLE);
-
- if (Descriptor == NULL)
- {
- /* Invalid handle */
- Sda->LastErrorCode = ERROR_INVALID_HANDLE; // ERROR_FILE_NOT_FOUND
- return FALSE;
- }
-
- if (Descriptor->DeviceInfo & FILE_INFO_DEVICE)
- {
- WORD Result;
- PDOS_DEVICE_NODE Node = DosGetDriverNode(Descriptor->DevicePointer);
-
- if (!Node->InputStatusRoutine) return FALSE;
-
- Result = Node->InputStatusRoutine(Node);
- return !(Result & DOS_DEVSTAT_BUSY);
- }
- else
- {
- DWORD FileSizeHigh;
- DWORD FileSize = GetFileSize(Descriptor->Win32Handle, &FileSizeHigh);
- LONG LocationHigh = 0;
- DWORD Location = SetFilePointer(Descriptor->Win32Handle, 0, &LocationHigh, FILE_CURRENT);
-
- return ((Location != FileSize) || (LocationHigh != FileSizeHigh));
- }
-}
-
-VOID DosPrintCharacter(WORD FileHandle, CHAR Character)
-{
- WORD BytesWritten;
-
- Sda->ByteBuffer = Character;
-
- /* Use the file writing function */
- DosWriteFile(FileHandle,
- MAKELONG(DOS_DATA_OFFSET(Sda.ByteBuffer), DOS_DATA_SEGMENT),
- 1,
- &BytesWritten);
-}
-
-BOOLEAN DosBuildSysEnvBlock(VOID)
-{
- LPSTR SourcePtr, Environment;
- LPSTR DestPtr = (LPSTR)SEG_OFF_TO_PTR(SYSTEM_ENV_BLOCK, 0);
-
- /*
- * Get the environment strings
- *
- * NOTE: On non-STANDALONE builds, this corresponds to the VDM environment
- * as created by BaseVDM for NTVDM. On STANDALONE builds this is the Win32
- * environment. In this last case we need to convert it to a proper VDM env.
- */
- SourcePtr = Environment = GetEnvironmentStrings();
- if (Environment == NULL) return FALSE;
-
- /* Fill the DOS system environment block */
- while (*SourcePtr)
- {
- /*
- * - Ignore environment strings starting with a '=',
- * they describe current directories.
- * - Ignore also the WINDIR environment variable since
- * DOS apps should ignore that we started from ReactOS.
- * - Upper-case the environment names, not their values.
- */
- if (*SourcePtr != '=' && _strnicmp(SourcePtr, "WINDIR", 6) != 0)
- {
- PCHAR Delim = NULL;
-
- /* Copy the environment string */
- strcpy(DestPtr, SourcePtr);
-
- /* Upper-case the environment name */
- Delim = strchr(DestPtr, '='); // Find the '=' delimiter
- if (Delim) *Delim = '\0'; // Temporarily replace it by NULL
- _strupr(DestPtr); // Upper-case
- if (Delim) *Delim = '='; // Restore the delimiter
-
- DestPtr += strlen(SourcePtr);
-
- /* NULL-terminate the environment string */
- *(DestPtr++) = '\0';
- }
-
- /* Move to the next string */
- SourcePtr += strlen(SourcePtr) + 1;
- }
- /* NULL-terminate the environment block */
- *DestPtr = '\0';
-
- /* Free the memory allocated for environment strings */
- FreeEnvironmentStrings(Environment);
-
- return TRUE;
-}
-
-BOOLEAN DosBIOSInitialize(VOID)
-{
- FILE *Stream;
- WCHAR Buffer[256];
-
- /* Set the data segment */
- setDS(BIOS_DATA_SEGMENT);
-
- /* Initialize the global DOS BIOS data area */
- BiosData = (PBIOS_DATA)SEG_OFF_TO_PTR(BIOS_DATA_SEGMENT, 0x0000);
-
- /* Initialize the DOS BIOS stack */
- // FIXME: Add a block of fixed size for the stack in BIOS/DOS_DATA instead!
- setSS(0x0F00);
- setSP(0x0FF0);
-/// setBP(0x091E); // DOS base stack pointer relic value
-
- /*
- * Initialize the INT 13h (BIOS Disk Services) handler chain support.
- *
- * The INT 13h handler chain is some functionality that allows DOS
- * to insert disk filter drivers in between the (hooked) INT 13h handler
- * and its original handler.
- * Typically, those are:
- * - filter for detecting disk changes (for floppy disks),
- * - filter for tracking formatting calls and correcting DMA boundary errors,
- * - a possible filter to work around a bug in a particular version of PC-AT's
- * IBM's ROM BIOS (on systems with model byte FCh and BIOS date "01/10/84" only)
- * (see http://www.ctyme.com/intr/rb-4453.htm for more details).
- *
- * This functionality is known to be used by some legitimate programs,
- * by Windows 3.x, as well as some illegitimate ones (aka. virii).
- *
- * See extra information about this support in dos.h
- */
- // FIXME: Should be done by the DOS BIOS
- BiosData->RomBiosInt13 = ((PULONG)BaseAddress)[0x13];
- BiosData->PrevInt13 = BiosData->RomBiosInt13;
-// RegisterDosInt32(0x13, DosInt13h); // Unused at the moment!
-
- //
- // HERE: Do all hardware initialization needed for DOS
- //
-
- /*
- * SysInit part...
- */
-
- /* Initialize the DOS kernel (DosInit) */
- if (!DosKRNLInitialize())
- {
- BiosDisplayMessage("Failed to load the DOS kernel! Exiting...\n");
- return FALSE;
- }
-
- /* DOS kernel loading succeeded, we can finish the initialization */
-
- /* Build the system master (pre-) environment block (inherited by the shell) */
- if (!DosBuildSysEnvBlock())
- {
- DosDisplayMessage("An error occurred when setting up the system environment block.\n");
- }
-
- /* TODO: Read CONFIG.NT/SYS */
- Stream = _wfopen(DOS_CONFIG_PATH, L"r");
- if (Stream != NULL)
- {
- while (fgetws(Buffer, ARRAYSIZE(Buffer), Stream))
- {
- // TODO: Parse the line
- }
- fclose(Stream);
- }
-
- return TRUE;
-}
-
-/* EOF */
projects / reactos.git / blobdiff