Compaq iPAQ 1.0 User Manual

Technical Reference Guide
Compaq iPAQ Series of Desktop Personal Computers
Review Copy - January 2001
8-5
8.3.2 EDID RETRIEVE
The BIOS function INT 15, AX=E813h is a tri-modal call that retrieves the VESA extended
display identification data (EDID). Two subfunctions are provided: AX=E813h BH=00h retrieves
the EDID information while AX=E813h BX=01h determines the level of DDC support.
Input:
AX = E813h
BH = 00 Get EDID .
BH = 01 Get DDC support level
If BH = 00 then
DS:(E)SI = Pointer to a buffer (128 bytes) where ROM will return block
If 32-bit protected mode then
DS:(E)SI = Pointer to $DDC location
Output:
(Successful)
If BH = 0:
DS:SI=Buffer with EDID file.
CX = Number of bytes written
CF = 0
AH =00h Completion of command
If BH = 1:
BH = System DDC support
<0>=1 DDC1 support
<1>=1 DDC2 support
BL = Monitor DDC support
<0>=1 DDC1 support
<1>=1 DDC2 support
<2>=1 Screen blanked during transfer
(Failure)
CF = 1
AH = 86h or 87h
8.3.3 DRIVE FAULT PREDICTION
The Compaq BIOS provides direct Drive Fault Prediction support for IDE-type hard drives. This
feature is provided through two BIOS calls. Function INT 15, AX=E817h is used to retrieve a 512-
byte block of drive attribute data while the INT 15, AX=E81Bh is used to retrieve the drive’s
warranty threshold data. If data is returned indicating possible failure then the following message
is displayed:
“
1720-Intellisafe Hard Drive detects imminent failure
”

Compaq iPAQ 1.0 Specifications

General

Brand	Compaq
Model	iPAQ 1.0
Category	Desktop
Language	English