|
| |
REQUEST HEADER
The request header passes the information describing what DOS
wants the device driver to do.
| Length |
Field |
| BYTE |
Length in bytes of the
request header plus data |
| BYTE |
Unit code. The subunit
the operation is for
(minor device). Has no meaning for character devices. |
| WORD |
Command code |
| 8 BYTEs |
Reserved for DOS |
| (variable) |
Data appropriate for
the operation |
|