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include blockdev.inc BlockDev_Device_Descriptor STRUC BDD_Next dd ? BDD_BD_Major_Ver db BD_Major_Version BDD_BD_Minor_Ver db BD_Minor_Version BDD_Device_Type db ? BDD_Int_13h_Number db ? BDD_Flags dd ? BDD_Name_Ptr dd ? BDD_Max_Sector dq ? BDD_Sector_Size dd ? BDD_Num_Heads dd ? BDD_Num_Cylinders dd ? BDD_Num_Sec_Per_Track dd ? BDD_Sync_Cmd_Proc dd ? BDD_Command_Proc dd ? BDD_Hw_Int_Proc dd 0 BDD_Reserved_BlockDev db BD_Priv_Data_Size dup (?) BlockDev_Device_Descriptor ENDS |
The BlockDev_Device_Descriptor structure contains information about the block device.
BDD_Next
Points to the next BlockDev_Device_Descriptor structure in the list.
BDD_BD_Major_Ver
Specifies the major version number. It is 03h for Windows version 3.1.
BDD_BD_Minor_Ver
Specifies the minor version number. It is 0Ah for Windows version 3.1.
BDD_Device_Type
Specifies the type of hardware device. It can be one of the following values:
| Value | Meaning |
| BDT_1200K_5_Inch_Floppy | 5.25 inch, 1.2 megabyte floppy drive |
| BDT_360K_5_Inch_Floppy | 5.25 inch, 360 kilobyte floppy drive |
| BDT_720K_3_Inch_Floppy | 3.5 inch, 720 kilobyte floppy drive |
| BDT_Double_Dens_8_Inch | 8 inch, double-density floppy drive |
| BDT_Fixed_Disk | Hard disk drive |
| BDT_Other | Other storage media |
| BDT_Single_Dens_8_Inch | 8 inch, single-density floppy drive |
| BDT_Tape_Drive | Tape drive |
BDD_Int_13h_Number
Specifies the Interrupt 13h number.
BDD_Flags
Specifies the device flags. It can be one or more of the following values:
| Value | Meaning |
| BDF_Cache | Cached device |
| BDF_Int13_Drive | Interrupt 13h drive |
| BDF_Remote | Remote device |
| BDF_Removable | Removable media |
| BDF_Serial_Cmd | Serial commands |
| BDF_Writeable | Writeable media |
BDD_Name_Ptr
Points to a null-terminated string specifying the name of the block device.
BDD_Max_Sector
Specifies the maximum number of sectors for the block device.
BDD_Sector_Size
Specifies the size (in bytes) of each sector.
BDD_Num_Heads
Specifies the number of head for the block device.
BDD_Num_Cylinders
Specifies the number of cylinders for the block device.
BDD_Num_Sec_Per_Track
Specifies the number of sectors in each track of the block device.
BDD_Sync_Cmd_Proc
Points to the synchronous command procedure for the block device.
BDD_Command_Proc
Points to the command procedure for the block device.
BDD_Hw_Int_Proc
Points to the hardware interrupt handler for the block device.
BDD_Reserved_BlockDev
Reserved; do not use.