HP Vectra Technical Reference Manual page 133

F_INQUIRE-ALL (AH
=
OSH)
This subfunction is used to determine which HP-HIL devices are present on the loop. The address
of a seven word table is passed to the subfunction. When the subfunction returns, the table will
contain the current status of all HP-HIL devices. The format of the buffer is shown in table 4.18.
Table 4.18
Device Inquire Buffer Format
HP-HIL
Word Device ID
0 High byte
1 " "
2
"
"
3
" "
4
" "
5 " "
6
"
"
Device Status*
Low byte
" "
" "
" "
" "
" "
" "
HP-HIL Device
Device
# 1
" " 2
" " 3
" " 4
" " 5
" " 6
" " 7
*
Bit 0
=
1 if device present, 0 if no device at this address.
Bits 2 - 7 are reserved.
On Entry: AH
=
F_INQUIRE--.-ALL (08H)
BP
=
V_SINPUT (002AH)
ES:SI Pointer to table
On Exit: AH
ES:SI
Return Status Code
Pointer to table
Registers Altered: AX, BP, DS
124 Input System and HP-HIL