BIOS Data for OS Booting Outline Necessary Data for OS Booting System Information APM OS ACPI OS DOS Service Routines Conclusions.

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Presentation transcript:

BIOS Data for OS Booting Outline Necessary Data for OS Booting System Information APM OS ACPI OS DOS Service Routines Conclusions

Necessary Data for OS Booting System Information for OS DMI data ESCD data PnP data Specifications for OS MP spec SMBIOS spec

Necessary Data for OS Booting Power Management APM ACPI BIOS Service Routines Interrupt Services SMI Services

System Information DMI Data SMBIOS spec 2.3 Define system devices. Store in Flash ROM. Move into memory after system configuration was finished.

System Information ESCD Extended System Configuration Data Support non-PnP devices configuration. Store in non-volatile storage. ESCD data could be accessed through PnP functions.

System Information Plug-and-Play Distributing System Resources DMA IO IRQ Memory Recording System Resources Extended ISA Support

System Information Plug-and-Play ISA Support Assign CSN (Card Select Number). Initialize PnP ISA cards. POST PCI ROM initialization System Resource Management Transferring Control to OS

System Information Miscellaneous Specifications MP Specification 1.4 Build up MP table in memory. System Management BIOS Specification Construct DMI data.

APM OS APM – Advanced Power Management APM BIOS – Software Interface to M/B, Devices and Component APM BIOS – APM Driver APM System Power State Full on APM Standby APM Suspend Off

APM OS APM Device Control Device On Device Power Managed Device Low Power Device Off APM CPU Control Full On Slow Clock Stop

ACPI OS ACPI – Advanced Configuration Power Interface Integrating APM, PnP, and MPS Operation-System directed configuration and Power Management Decreasing the Complexity of BIOS AML codes of System Information

ACPI OS ACPI Structure

ACPI OS ACPI vs. Legacy

ACPI OS Power Model

ACPI OS Event Model

DOS Service Routine 256 Vectors Table Multiple Services Int 10h – Video Vector Int 15h – Miscellaneous Services Int 21h – Showing Characters … DOS Services

Conclusions ACPI OS will be the standard. APM is out of date. Microsoft WHQL and Knowledge Base provides many related information.