HP Vectra Technical Reference Manual page 436

G.4 Initialization
This section covers the possible steps the driver must take to insure proper initialization.
G.4.1 Product Identification
This section discusses several methods available through ROM BIOS functions for software to
determine whether its host is an HP Vectra.
HP Vectra Feature/Revision Identification (V_SCOPY):
The V_SCOPY (OOH) vector entry has a data segment (DS) that points to the system's copyright
string. The driver can look at this string to determine if the machine is an HP Vectra. The
following example illustrates how to get this string:
MOV BP, V_SCOPY
PUSH OS
INT HP_ENTRY
PUSH OS
POP ES
POP OS
,. Call the COPYRIGHT vector
,. which will set the OS and return
,. Save OS of copyright string
,. in ES. ES:O is address of string
,. Recover old
os.
HP Vectra Indicator Word, Revision Word, and Date Codes
At ROM address OFOOF8H the HP Vectra has the following data.
Ow 'HP'
OW 0000
OW Revision_code
OW Date_code
,. Byte 0
=
year, byte 1
=
week
This code can be used to discern the HP Vectra from other industry standard products and thus
take advantage of the unique features of the HP Vedra. This method is not the preferred
method.
Driver Writer's Guide 427