HP Vectra Technical Reference Manual page 442

SF_START (AX
=
0202H)
This function notifies a driver that it may call other drivers for any additional setup it may require.
All other ROM drivers and ROM services are present, active and capable of being accessed. This
function does not usually return to the caller until all its internal and external setup is complete.
On Entry: AH
=
F_SYSTEM (02H)
AL
=
SF_START (02H)
BP
=
Driver's vector address
On Exit: AH
=
Return Status Code
Reports a word of status or state information to the caller in the DX register. The format of the
state information will be presented bit wise and should be presented in the same format for all
drivers of the same class.
On Entry: AH
=
F_SYSTEM (02H)
AL
=
SF_REPORT_STATE
BP
=
Driver's vector address
On Exit: AH
=
Return Status Code
BX
=
State of Driver
SF_VERSION_DESC (AX
=
0206H)
Reports the version number of
thE~
driver code and an optional describe record which contains
other driver-dependent information.
On Entry: AH
=
F_SYSTEM (02H)
AL
=
SF_ VERSION_DESC (06H)
BP
=
Driver's vector address
On Exit: AH
=
Return Status Code
BX
=
Version number, YYWW is a BeD number where,
WW is the week of the year
YY is the number of years since 1960
ex
=
Number of bytes in data buffer
ES:DI
=
Pointer to describe record
Driver Writer's Guide 433