Specifications

Chapter 2-23
Software Specification for KB-BIOS
General purpose
This document define the EC specification with standard interface and also define the special
feature for OEM function .It’s useful for software engineer to access EC status,and for SA test
guide.
Features
•
Advanced Power Management 1.2 support
• ACPI1.0 b and PC2001 compliant
• Support SMBus specification V1.0
• Hot keys for system control
• Audio volume output control
• External LED control
• Battery scope report and control
• Battery learning support
• Sticky key support
• Power switch control
• Speaker control
• Port replicator
• Extra key emulation
• Two host interface channels support
• Supports three independent devices
• Devices Hot Plug-and Play/Hot swapping configuration
• Internal Keyboard country selection
Types of KB-BIOS provided
• Standard version
Support for US(87)/UK(88)/Japanese(90) keyboard.
KB-BIOS command support with SYSTEM-BIOS
Command set 40h-4Fh for OEM defined through Port60/64 and Port62/66
Command Set (from system's point of view) via 60/64 and 62/66
CMD DATA Description return
40h Boot fail restart
0x01-0x7F Boot fail restart, write in a byte to EC and enable the timer.
This command called by BIOS and will cause the system
reboot after the byte count down to zero if system still no
reset the counter. It could make sure the system success
boot up.
None