DOS_CODE module routines

DOS_CODE.C

This module contains various low level DOS disk interface routines. Warning - routines in this module can fetch things that if written back to disk - Could (and if Murphy has anything to say about it WILL) mung things up VERY bad. So don't write these back unless you know what you are doing. Ok you been warned, it's your foot.

Function	load_disk_boot_record
Include file	DOS_CODE.H
Prototype	void load_disk_boot_record( int drive )
Remarks	Load the boot record for the requested drive and calc the start of the root directory. Drive is absolute drive number (not logical).

Function	get_logical_sector_number
Include file	DOS_CODE.H
Prototype	UINT get_logical_sector_number( UINT cluster )
Remarks	Convert disk cluster number into logical sector numbers.

Function	get_dir_record
Include file	DOS_CODE.H
Prototype	DIR_REC get_dir_record( char file_name_n_ext , int start_sector , int root_flag )
Remarks	This routine will read and search a MSDOS directory file for a target entry. The disk sector of the directory file must be given but the search can be either the root dir or any sub-directory. Sub-directory searchs are limited to the cluster of the directory.

Function	load_disk_info_via_ioctl
Include file	DOS_CODE.H
Prototype	void load_disk_info_via_ioctl( void )
Remarks	Use the Int 21 IOCTL get device parameters call to fetch disk info.

Function	get_dos_version
Include file	DOS_CODE.H
Prototype	int get_dos_version( void )
Remarks	return XY where X - major , Y - minor version levels.

Function	call_int21_get_disk_data
Include file	DOS_CODE.H
Prototype	void call_int21_get_disk_data( void )
Remarks	Call the old Int 21 get disk data function.

Table of Contents Function Index