Online HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens
MSC: unsigned _bios_disk(unsigned cmd,struct diskinfo_t *dskinfo)
- prototype in bios.h
- cmd = _DISK_RESET resets disk system (INT 13,0)
= _DISK_STATUS return disk status (INT 13,1)
= _DISK_READ read disk sectors (INT 13,2)
= _DISK_WRITE write disk sectors (INT 13,3)
= _DISK_VERIFY verify disk sectors (INT 13,4)
= _DISK_FORMAT format disk track (INT 13,5)
- dskinfo = pointer to structure containing disk information:
struct diskinfo_t
{
unsigned drive; - physical drive number
unsigned head; - head number
unsigned track; - track number
unsigned sector; - sector number
unsigned nsectors; - sectors to deal with
void _far *buffer; - data buffer
};
- returns status of operation (AX register, AH contains status)
- drive numbers represent physical drives (0 = A:, 1 = B:,
80h = drive 0, 81h = drive 1
- disk reads should be retried at least 3 times
- Turbo C uses biosdisk()
- see INT 13
[helppc.bosbyte.nl] _bios_disk