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REMOVABLE MEDIA (DOS 3.x)
command code = 15
ES:BX pointer
length field
13 bytes status request header
To use this call, set bit 11 of the attribute field to 1. Block
devices can only use this call through a subfunction of the IOCTL
function call (44h). This call is useful because it allows a
utility to know whether it is dealing with a nonremovable media
drive or with a removable media drive. For example, the FORMAT
utility needs to know whether a drive is removable or
nonremovable because it prints different versions of some
prompts.
The information is returned in the BUSY bit of the status word.
If the busy bit is 1, the media is nonremovable.
Note: No error checking is performed. It is assumed that this
call always succeeds. |