This is a type of file or record used internally by Turbo Pascal. It is around 256 bytes in size.
| Address | Size (bytes) | Name | Type | Description |
|---|---|---|---|---|
| 0000 | 2 | Handle | WORD | Handle contains the file’s handle (when the file is open) as returned by DOS |
| 0002 | 2 | Mode | WORD | The Mode field can assume one of the magic values (see Modes) |
| 0004 | 2 | BufSize | WORD | Size of the TextBuf character buffer |
| 0006 | 2 | Private | WORD | Unused but reserved |
| 0008 | 2 | BufPos | WORD | Index of the next character in the buffer to read or write |
| 000A | 2 | BufEnd | WORD | Count of characters in the buffer |
| 000C | 4 | BufPtr | FAR PTR | Pointer to TextBuf buffer of BufSize bytes |
| 0010 | 4 | OpenFunc | FAR PTR | Pointer to I/O routine that opens this file |
| 0014 | 4 | InOutFunc | FAR PTR | Pointer to I/O routine that performs read/write on this file |
| 0018 | 4 | FlushFunc | FAR PTR | Pointer to I/O routine that flushes the buffer |
| 001C | 4 | CloseFunc | FAR PTR | Pointer to I/O routine that closes this file |
| 0020 | 16 | UserData | BYTE array | Not used by Turbo Pascal. can be freely used to store any data |
| 0030 | 80 | Name | BYTE array | This file’s name which is a NULL (00h) terminated string |
| 0080 | 128 | TextBuf | BYTE array | Character buffer |
Total size: 256 (100h) bytes
See also: File Modes, Input/Output, or Go Back