Western Digital T13/2132-D - Manual (Page 50)

T13/2132-D Revision 3 June 23, 2010
38 Working Draft Enhanced Disk Drive - 4 (EDD-4)
8.10 Get Disk Type (FN 15h)
This function shall be used to find the device type. This function is called by some versions of DOS during the
boot process.
Entry
AH 15h
DL BIOS device number
Exit
Carry Clear Function completed without error
AH
Value Description
00h Removable media device present
03h Fixed media device present
CX:DX Number of sectors on the media
Carry Set Function completed with an error
AH Shall be set to the error code