Text File Type

This is a type of file or record used internally by Turbo Pascal. It is around 256 bytes in size.

Structure of Text Type

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