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Method of switching power settings in BIOS Disclosure Number: IPCOM000019736D
Original Publication Date: 2003-Sep-26
Included in the Prior Art Database: 2003-Sep-26
Document File: 2 page(s) / 101K

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Method for Controlling 5VSB through bios.

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Method of switching power settings in BIOS

  The 'One Watt Executive Order' (1WEO) states that PCs must not draw more than one watt of power while the system is in the S5(off) state. In order for OEM manufacturers to sell systems to government agencies, the systems will have to meet the requirements of the 1WEO. This disclosure describes a method to create a second stage component which gives the customer the ability to switch between a 'normal operating mode', and 'power saving mode'. A BIOS setting would control the PWR on signal, 5VSB, and PWR OUT, effectively gating the standby current to the main system board. This is being developed as a second stage addition. It will not add cost to all systems, but rather only to those systems being sold to government organizations which 1WEO is mandated for. Adding the ability for BIOS to select between normal operation and low power mode is necessary in order to obtain Microsoft Logo certification for the platform.

    During normal operation mode, the LAN controller would still be active. This means the system would be able to pass the Microsoft Logo Hardware Compatibility Tests (HCT tests). During low power operation, the second stage controller would switch off power to the motherboard, thus powering down the LAN controller.

    This invention will allow for a single hardware solution to the problem, with the select group of users being able to choose the power option that applies to them. This will allow IBM to provide a solution for those users who need to meet the requirements of the 1WEO. Users that are not required to meet this specification would not be affected by this second stage device as it would appear completely passive to them in operation. Below you will see a block diagram of the proposed solution (Figure 1). Also shown below is the process flowchart which describes the process a system would follow when it is modified to include...