+++ /dev/null
-/*
- * COPYRIGHT: GPL - See COPYING in the top level directory
- * PROJECT: ReactOS Virtual DOS Machine
- * FILE: dskbios32.c
- * PURPOSE: VDM 32-bit Disk BIOS
- * PROGRAMMERS: Hermes Belusca-Maito (hermes.belusca@sfr.fr)
- */
-
-/* INCLUDES *******************************************************************/
-
-#include "ntvdm.h"
-
-#define NDEBUG
-#include <debug.h>
-
-#include "emulator.h"
-// #include "../../memory.h"
-// #include "cpu/bop.h"
-#include "cpu/cpu.h" // for EMULATOR_FLAG_ZF
-#include "int32.h"
-
-#include "dskbios32.h"
-// #include <bios/dskbios.h>
-#include "bios32p.h"
-
-#include "hardware/disk.h"
-
-
-/* DEFINES ********************************************************************/
-
-// Disks which are currently supported by the BIOS Disk module.
-// NOTE: For the current implementation those are arrays of pointers to
-// DISK_IMAGEs maintained by the Generic Disk Controller. In the future
-// they will be arrays of objects containing disk information needed by
-// the BIOS only.
-static PDISK_IMAGE FloppyDrive[2] = {NULL};
-static PDISK_IMAGE HardDrive[4] = {NULL};
-
-#pragma pack(push, 1)
-
-// See: http://www.ctyme.com/intr/rb-2445.htm
-typedef struct _FLOPPY_PARAM_TABLE
-{
- BYTE Unused0;
- BYTE Unused1;
- BYTE MotorOffDelay;
- BYTE SectorSize;
- BYTE SectorsPerTrack;
- BYTE SectorGapLength;
- BYTE DataLength;
- BYTE FormatGapLength;
- BYTE FormatFillByte;
- BYTE HeadSettleTime;
- BYTE MotorStartTime;
-} FLOPPY_PARAM_TABLE, *PFLOPPY_PARAM_TABLE;
-
-typedef struct _FLOPPY_PARAM_TABLE_EX
-{
- FLOPPY_PARAM_TABLE FloppyParamTable;
-
- // IBM Additions
- BYTE MaxTrackNumber;
- BYTE DataTransferRate;
- BYTE CmosDriveType;
-} FLOPPY_PARAM_TABLE_EX, *PFLOPPY_PARAM_TABLE_EX;
-
-#pragma pack(pop)
-
-// Parameters for 1.44 MB Floppy, taken from SeaBIOS
-
-#define FLOPPY_SIZE_CODE 0x02 // 512 byte sectors
-#define FLOPPY_DATALEN 0xFF // Not used - because size code is 0x02
-#define FLOPPY_MOTOR_TICKS 37 // ~2 seconds
-#define FLOPPY_FILLBYTE 0xF6
-#define FLOPPY_GAPLEN 0x1B
-#define FLOPPY_FORMAT_GAPLEN 0x6C
-
-static const FLOPPY_PARAM_TABLE_EX FloppyParamTable =
-{
- // PC-AT compatible table
- {
- 0xAF, // step rate 12ms, head unload 240ms
- 0x02, // head load time 4ms, DMA used
- FLOPPY_MOTOR_TICKS, // ~2 seconds
- FLOPPY_SIZE_CODE,
- 18,
- FLOPPY_GAPLEN,
- FLOPPY_DATALEN,
- FLOPPY_FORMAT_GAPLEN,
- FLOPPY_FILLBYTE,
- 0x0F, // 15ms
- 0x08, // 1 second
- },
-
- // IBM Additions
- 79, // maximum track
- 0, // data transfer rate
- 4, // drive type in CMOS
-};
-
-
-#pragma pack(push, 1)
-
-// See: http://www.ctyme.com/intr/rb-6135.htm
-typedef struct _HARDDISK_PARAM_TABLE
-{
- WORD Cylinders;
- BYTE Heads;
- WORD Unused0;
- WORD Unused1;
- BYTE Unused2;
- BYTE Control;
- BYTE StandardTimeout;
- BYTE FormatTimeout;
- BYTE CheckingTimeout;
- WORD LandZoneCylinder;
- BYTE SectorsPerTrack;
- BYTE Reserved;
-} HARDDISK_PARAM_TABLE, *PHARDDISK_PARAM_TABLE;
-
-#pragma pack(pop)
-
-// static const HARDDISK_PARAM_TABLE HardDiskParamTable =
-// {0};
-
-
-/* PRIVATE FUNCTIONS **********************************************************/
-
-static PDISK_IMAGE
-GetDisk(IN BYTE DiskNumber)
-{
- if (DiskNumber & 0x80)
- {
- DiskNumber &= ~0x80;
-
- if (DiskNumber >= ARRAYSIZE(HardDrive))
- {
- DPRINT1("GetDisk: HDD number 0x%02X invalid\n", DiskNumber | 0x80);
- return NULL;
- }
-
- return HardDrive[DiskNumber];
- }
- else
- {
- if (DiskNumber >= ARRAYSIZE(FloppyDrive))
- {
- DPRINT1("GetDisk: Floppy number 0x%02X invalid\n", DiskNumber);
- return NULL;
- }
-
- return FloppyDrive[DiskNumber];
- }
-}
-
-static VOID
-AllDisksReset(VOID)
-{
- Bda->LastDisketteOperation = 0;
- Bda->LastDiskOperation = 0;
-}
-
-/*static*/
-VOID WINAPI BiosDiskService(LPWORD Stack)
-{
- BYTE Drive;
- PDISK_IMAGE DiskImage;
-
- switch (getAH())
- {
- /* Disk -- Reset Disk System */
- case 0x00:
- {
- Drive = getDL();
-
- if (Drive & 0x80)
- {
- AllDisksReset();
-
- /* Return success */
- setAH(0x00);
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
- break;
- }
-
- Drive &= ~0x80;
-
- if (Drive >= ARRAYSIZE(FloppyDrive))
- {
- DPRINT1("BiosDiskService(0x00): Drive number 0x%02X invalid\n", Drive);
-
- /* Return error */
- setAH(0x01);
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- break;
- }
-
- // TODO: Reset drive
-
- /* Return success */
- setAH(0x00);
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
- break;
- }
-
- /* Disk -- Get Status of Last Operation */
- case 0x01:
- {
- BYTE LastOperationStatus = 0x00;
-
- Drive = getDL();
- DiskImage = GetDisk(Drive);
- if (!DiskImage || !IsDiskPresent(DiskImage))
- {
- DPRINT1("BiosDiskService(0x01): Disk number 0x%02X invalid\n", Drive);
-
- /* Return error */
- setAH(0x01);
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- break;
- }
-
- LastOperationStatus = DiskImage->LastOperationStatus;
-
- if (Drive & 0x80)
- Bda->LastDiskOperation = LastOperationStatus;
- else
- Bda->LastDisketteOperation = LastOperationStatus;
-
- /* Return last error */
- setAH(LastOperationStatus);
- if (LastOperationStatus == 0x00)
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
- else
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
-
- break;
- }
-
- /* Disk -- Read Sectors into Memory */
- case 0x02:
- {
- BYTE Status;
- BYTE Head = getDH();
- BYTE NumSectors = getAL();
-
- // CH: Low eight bits of cylinder number
- // CL: High two bits of cylinder (bits 6-7, hard disk only)
- WORD Cylinder = MAKEWORD(getCH(), (getCL() >> 6) & 0x02);
-
- // CL: Sector number 1-63 (bits 0-5)
- BYTE Sector = (getCL() & 0x3F); // 1-based
-
- Drive = getDL();
- DiskImage = GetDisk(Drive);
- if (!DiskImage || !IsDiskPresent(DiskImage))
- {
- DPRINT1("BiosDiskService(0x02): Disk number 0x%02X invalid\n", Drive);
-
- /* Return error */
- setAH(0x01);
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- break;
- }
-
- /* Read the sectors */
- Status = ReadDisk(DiskImage, Cylinder, Head, Sector, NumSectors);
- if (Status == 0x00)
- {
- /* Return success */
- setAH(0x00);
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
- }
- else
- {
- DPRINT1("BiosDiskService(0x02): Error when reading from disk number 0x%02X (0x%02X)\n", Drive, Status);
-
- /* Return error */
- setAH(Status);
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- }
-
- break;
- }
-
- /* Disk -- Write Disk Sectors */
- case 0x03:
- {
- BYTE Status;
- BYTE Head = getDH();
- BYTE NumSectors = getAL();
-
- // CH: Low eight bits of cylinder number
- // CL: High two bits of cylinder (bits 6-7, hard disk only)
- WORD Cylinder = MAKEWORD(getCH(), (getCL() >> 6) & 0x02);
-
- // CL: Sector number 1-63 (bits 0-5)
- BYTE Sector = (getCL() & 0x3F); // 1-based
-
- Drive = getDL();
- DiskImage = GetDisk(Drive);
- if (!DiskImage || !IsDiskPresent(DiskImage))
- {
- DPRINT1("BiosDiskService(0x03): Disk number 0x%02X invalid\n", Drive);
-
- /* Return error */
- setAH(0x01);
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- break;
- }
-
- /* Write the sectors */
- Status = WriteDisk(DiskImage, Cylinder, Head, Sector, NumSectors);
- if (Status == 0x00)
- {
- /* Return success */
- setAH(0x00);
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
- }
- else
- {
- DPRINT1("BiosDiskService(0x03): Error when writing to disk number 0x%02X (0x%02X)\n", Drive, Status);
-
- /* Return error */
- setAH(Status);
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- }
-
- break;
- }
-
- /* Disk -- Verify Disk Sectors */
- case 0x04:
-
- /* Floppy/Fixed Disk -- Format Track */
- case 0x05:
-
- /* Fixed Disk -- Format Track and Set Bad Sector Flags */
- case 0x06:
-
- /* Fixed Disk -- Format Drive starting at Given Track */
- case 0x07:
- goto Default;
-
- /* Disk -- Get Drive Parameters */
- case 0x08:
- {
- WORD MaxCylinders;
- BYTE MaxHeads;
- BYTE PresentDrives = 0;
- BYTE i;
-
- Drive = getDL();
- DiskImage = GetDisk(Drive);
- if (!DiskImage || !IsDiskPresent(DiskImage))
- {
- DPRINT1("BiosDiskService(0x08): Disk number 0x%02X invalid\n", Drive);
-
- /* Return error */
- setAH(0x01);
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- break;
- }
-
- // Minus 2 because it's the maximum cylinder number (not count),
- // and the last cylinder is reserved (for compatibility with BIOSes
- // which reserve it for testing purposes).
- MaxCylinders = DiskImage->DiskInfo.Cylinders - 2;
- // Minus 1 because it's the maximum head number (not count).
- MaxHeads = DiskImage->DiskInfo.Heads - 1;
-
- // CL: Sector number 1-63 (bits 0-5)
- // High two bits of cylinder (bits 6-7, hard disk only)
- setCL((DiskImage->DiskInfo.Sectors & 0x3F) |
- ((HIBYTE(MaxCylinders) & 0x02) << 6));
- // CH: Low eight bits of cylinder number
- setCH(LOBYTE(MaxCylinders));
-
- setDH(MaxHeads);
-
- if (Drive & 0x80)
- {
- /* Count the number of active HDDs */
- for (i = 0; i < ARRAYSIZE(HardDrive); ++i)
- {
- if (IsDiskPresent(HardDrive[i]))
- ++PresentDrives;
- }
-
- /* Reset ES:DI to NULL */
- // FIXME: NONONO!! Apps expect (for example, MS-DOS kernel)
- // that this function does not modify ES:DI if it was called
- // for a HDD.
- // setES(0x0000);
- // setDI(0x0000);
- }
- else
- {
- /* Count the number of active floppies */
- for (i = 0; i < ARRAYSIZE(FloppyDrive); ++i)
- {
- if (IsDiskPresent(FloppyDrive[i]))
- ++PresentDrives;
- }
-
- /* ES:DI points to the floppy parameter table */
- setES(HIWORD(((PULONG)BaseAddress)[0x1E]));
- setDI(LOWORD(((PULONG)BaseAddress)[0x1E]));
- }
- setDL(PresentDrives);
-
- setBL(DiskImage->DiskType); // DiskGeometryList[DiskImage->DiskType].biosval
- setAL(0x00);
-
- /* Return success */
- setAH(0x00);
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
- break;
- }
-
- /* Hard Disk -- Initialize Controller with Drive Parameters */
- case 0x09:
-
- /* Hard Disk -- Read Long Sectors */
- case 0x0A:
-
- /* Hard Disk -- Write Long Sectors */
- case 0x0B:
- goto Default;
-
- /* Hard Disk -- Seek to Cylinder */
- case 0x0C:
- {
- BYTE Status;
- BYTE Head = getDH();
-
- // CH: Low eight bits of cylinder number
- // CL: High two bits of cylinder (bits 6-7, hard disk only)
- WORD Cylinder = MAKEWORD(getCH(), (getCL() >> 6) & 0x02);
-
- // CL: Sector number 1-63 (bits 0-5)
- BYTE Sector = (getCL() & 0x3F); // 1-based
-
- Drive = getDL();
- if (!(Drive & 0x80))
- {
- DPRINT1("BiosDiskService(0x0C): Disk number 0x%02X is not a HDD\n", Drive);
-
- /* Return error */
- setAH(0x01);
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- break;
- }
-
- DiskImage = GetDisk(Drive);
- if (!DiskImage || !IsDiskPresent(DiskImage))
- {
- DPRINT1("BiosDiskService(0x0C): Disk number 0x%02X invalid\n", Drive);
-
- /* Return error */
- setAH(0x01);
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- break;
- }
-
- /* Set position */
- Status = SeekDisk(DiskImage, Cylinder, Head, Sector);
- if (Status == 0x00)
- {
- /* Return success */
- setAH(0x00);
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
- }
- else
- {
- DPRINT1("BiosDiskService(0x0C): Error when seeking in disk number 0x%02X (0x%02X)\n", Drive, Status);
-
- /* Return error */
- setAH(Status);
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- }
-
- break;
- }
-
- /* Hard Disk -- Reset Hard Disks */
- case 0x0D:
- {
- // FIXME: Should do what 0x11 does.
- UNIMPLEMENTED;
- }
-
- /* Hard Disk -- Read Sector Buffer (XT only) */
- case 0x0E:
-
- /* Hard Disk -- Write Sector Buffer (XT only) */
- case 0x0F:
- goto Default;
-
- /* Hard Disk -- Check if Drive is ready */
- case 0x10:
- {
- Drive = getDL();
- if (!(Drive & 0x80))
- {
- DPRINT1("BiosDiskService(0x10): Disk number 0x%02X is not a HDD\n", Drive);
-
- /* Return error */
- setAH(0x01);
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- break;
- }
-
- DiskImage = GetDisk(Drive);
- if (!DiskImage || !IsDiskPresent(DiskImage))
- {
- DPRINT1("BiosDiskService(0x10): Disk number 0x%02X invalid\n", Drive);
-
- /* Return error */
- setAH(0x01);
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- break;
- }
-
- /* Return success */
- setAH(0x00);
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
- break;
- }
-
- /* Hard Disk -- Recalibrate Drive */
- case 0x11:
- {
- BYTE Status;
-
- Drive = getDL();
- if (!(Drive & 0x80))
- {
- DPRINT1("BiosDiskService(0x11): Disk number 0x%02X is not a HDD\n", Drive);
-
- /* Return error */
- setAH(0x01);
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- break;
- }
-
- DiskImage = GetDisk(Drive);
- if (!DiskImage || !IsDiskPresent(DiskImage))
- {
- DPRINT1("BiosDiskService(0x11): Disk number 0x%02X invalid\n", Drive);
-
- /* Return error */
- setAH(0x01);
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- break;
- }
-
- /* Set position to zero */
- Status = SeekDisk(DiskImage, /*Cylinder*/ 0, /*Head*/ 0, /*Sector*/ 1);
- if (Status == 0x00)
- {
- /* Return success */
- setAH(0x00);
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
- }
- else
- {
- DPRINT1("BiosDiskService(0x11): Error when recalibrating disk number 0x%02X (0x%02X)\n", Drive, Status);
-
- /* Return error */
- setAH(Status);
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- }
-
- break;
- }
-
- /* Hard Disk -- Controller RAM Diagnostic */
- case 0x12:
-
- /* Hard Disk -- Drive Diagnostic */
- case 0x13:
-
- /* Hard Disk -- Controller Internal Diagnostic */
- case 0x14:
- goto Default;
-
- /* Disk -- Get Disk Type */
- case 0x15:
- {
- Drive = getDL();
- DiskImage = GetDisk(Drive);
- if (!DiskImage || !IsDiskPresent(DiskImage))
- {
- DPRINT1("BiosDiskService(0x15): Disk number 0x%02X invalid\n", Drive);
-
- /* Return error */
- setAH(0x01);
- Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
- break;
- }
-
- if (Drive & 0x80)
- {
- ULONG NumSectors;
-
- /* Hard disk */
- setAH(0x03);
-
- /* Number of 512-byte sectors in CX:DX */
- NumSectors = (ULONG)((ULONG)DiskImage->DiskInfo.Cylinders * DiskImage->DiskInfo.Heads)
- * DiskImage->DiskInfo.Sectors;
- setCX(HIWORD(NumSectors));
- setDX(LOWORD(NumSectors));
- }
- else
- {
- /* Floppy */
- setAH(0x01);
- }
-
- /* Return success */
- Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
- break;
- }
-
- /* Floppy Disk -- Detect Disk Change */
- case 0x16:
-
- /* Floppy Disk -- Set Disk Type for Format */
- case 0x17:
-
- /* Disk -- Set Media Type for Format */
- case 0x18:
- goto Default;
-
- default: Default:
- {
- DPRINT1("BIOS Function INT 13h, AH = 0x%02X, AL = 0x%02X, BH = 0x%02X NOT IMPLEMENTED\n",
- getAH(), getAL(), getBH());
- }
- }
-}
-
-/* PUBLIC FUNCTIONS ***********************************************************/
-
-VOID DiskBios32Post(VOID)
-{
- /*
- * Initialize BIOS Disk RAM dynamic data
- */
-
- /* Some vectors are in fact addresses to tables */
- // Diskette Parameters
- ((PULONG)BaseAddress)[0x1E] = MAKELONG(0xEFC7, BIOS_SEGMENT);
- // Hard Disk 0 Parameter Table Address
- ((PULONG)BaseAddress)[0x41] = (ULONG)NULL;
- // Hard Disk 1 Drive Parameter Table Address
- ((PULONG)BaseAddress)[0x46] = (ULONG)NULL;
-
- /* Relocated services by the BIOS (when needed) */
- ((PULONG)BaseAddress)[0x40] = (ULONG)NULL; // ROM BIOS Diskette Handler relocated by Hard Disk BIOS
- // RegisterBiosInt32(0x40, NULL); // ROM BIOS Diskette Handler relocated by Hard Disk BIOS
-
- /* Register the BIOS 32-bit Interrupts */
- RegisterBiosInt32(BIOS_DISK_INTERRUPT, BiosDiskService);
-
- /* Initialize the BDA */
- // Bda->LastDisketteOperation = 0;
- // Bda->LastDiskOperation = 0;
- AllDisksReset();
-}
-
-BOOLEAN DiskBios32Initialize(VOID)
-{
- /*
- * Initialize BIOS Disk ROM static data
- */
-
- /* Floppy Parameter Table */
- RtlCopyMemory(SEG_OFF_TO_PTR(BIOS_SEGMENT, 0xEFC7),
- &FloppyParamTable.FloppyParamTable,
- sizeof(FloppyParamTable.FloppyParamTable));
-
- //
- // FIXME: Must be done by HW floppy controller!
- //
-
- /* Detect and initialize the supported disks */
- // TODO: the "Detect" part is missing.
- FloppyDrive[0] = RetrieveDisk(FLOPPY_DISK, 0);
- FloppyDrive[1] = RetrieveDisk(FLOPPY_DISK, 1);
- HardDrive[0] = RetrieveDisk(HARD_DISK, 0);
- HardDrive[1] = RetrieveDisk(HARD_DISK, 1);
- HardDrive[2] = RetrieveDisk(HARD_DISK, 2);
- HardDrive[3] = RetrieveDisk(HARD_DISK, 3);
-
- return TRUE;
-}
-
-VOID DiskBios32Cleanup(VOID)
-{
-}
-
-/* EOF */
projects / reactos.git / blobdiff