DOS/32 Advanced DOS Extender
- Programmer's Reference
3.04 - DOS function 1Ch - Get
Specific Drive Info
In:
AH = 1Ch DL = drive number
Out:
if successful: AL = sectors per cluster ECX = bytes per sector EDX = total number of clusters on drive DS:EBX = pointer to media ID byte
if failed: AL = 0FFh (invalid drive in DL)
Notes:
a) The selector returned
in DS register will be zero selector, ie readable/writeable data selector
with Base=0. This is an internal to DOS/32 Advanced selector which may
NOT be freed or modified under any circumstances.