HP Vectra Technical Reference Manual page 454

Class
Definition
Hex Bit
Name (If bit
=
'1', driver is member of class)
0080
07H CLBLK Addressed block device.
0040 06H CLBOOT
Logical device used as the priority boot device. If set
on a physical device, the device is capable of being a
boot device. Typically a physical driver would have
both the CLBOOT bit set and the CLBLK bit set.
0020 OSH CLLGID Logical graphics input device (for example
V_LTABLET, V_LPOINTER V_LHPMOUSE, physical
GID devices and the keyboard driver). This class maps
to logical devices which are not the child of another
driver.
0010 04H CLPGID
This class of driver can map to a device which is the
child of another driver.
0008 03H CLGID This class is reserved for all dt ivers which can map to
an event.
0004 02H CLPTS Physical touch device (for example, physical GID
drivers or V_LTOUCH).
0002
01H CL01 Reserved
0001 OOH CLOO Class Extension Bit
Special Group Classes
FFFF
-
CLALL This device maps to all other devices (V_PNULL).
0000
-
CLNULL This device maps to no other driver.
The DH_V_PARENT field contains a vector to the driver that is called
when the current driver receives an F_ISR function code that it
cannot or doesn't know how to process.
The DH_V_CHILD field contains a vector to the driver that is called if
this driver decides it cannot handle the request function (as long as
that function is :lot F _ISR).
Major address range.
Minor address range.
, . . See the HP_SHEADER macro definition in the equate files listed in Appendix E.
Driver Writer's Guide 445