HP Vectra Technical Reference Manual page 90

F_SAMPLE (AH
=
06H)
This function allows an application to poll the pointer device. This function reports the current
absolute position of the logical device in a form similar to a Logical ISR Event Record.
On Entry: AH
=
F_SAMPLE (06H)
BP
=
V_LPOINTER (OOCOH)
On Exit: AH
=
Return Status Code
BX
=
Current logical position along X axis
CX
=
Current logical position along Y axis
DL
=
LD_TRANSITION field of Logical Describe Record
DH
=
LD_STATE field of Logical Describe Record
ES:O
=
Pointer to logical device header and Describe Record
Registers Altered: AX, BX, CX, DX, BP, DS, ES
The following is an example of how to call the F_SAMPLE function.
MOV AH, F_SAMPLE
MOV BP, V-,-POINTER
PUSH OS
INT HP_ENTRY
POP OS
,. load function code
,. load vector address
,. save the current
OS
,. call extended BIOS driver
,. restore OS
4.2.3.3 V_LTABLET Driver (BP
=
OOBAH)
This section contains a detailed description of the tablet driver. See table 4.8 for a summary of
functions supported by this driver.
Input System and HP-HIL 81