US 2003/0142111 A1 · Method and apparatus for implementing color graphics on a remote computer

Abstract

A method and apparatus captures the color palettes of a video graphics controller of a managed computer to a remote computer to transmit correct color information to a remote computer. A remote management controller may perform this technique independent from the operating system. The managed computer includes a processor and a video graphics controller. The remote management controller snoops a bus, which couples the processor to the video graphics controller, for processor accesses to the EGA and VGA color palettes stored in the video graphics controller. The remote management controller includes an EGA shadow look up table and a VGA shadow look up table that store the snooped information which is used to create correct color information to be transmitted to the remote computer so that it can display the same colors generated at the managed computer.

Claims22

Dependent claims

An apparatus for implementing color graphics on a remote computer, the apparatus comprising:

a remote management controller having an EGA shadow look up table and a VGA shadow look up table, the remote management controller being adapted to snoop accesses to EGA and VGA color palettes of a video graphics controller, and to create a copy of information in the EGA color palette in the EGA shadow look up table and a copy of information in the VGA color palette in the VGA shadow look up table, wherein information in the EGA shadow look up table and the VGA shadow look up table is used to communicate correct color information to the remote computer.

A computer system comprising:

a first computer;
a second computer;
a network coupling the first computer to the second computer;
the first computer comprising:
a processor;
a video graphics controller coupled to the processor, the video graphics controller having an EGA color palette and a VGA color palette that are accessible by the processor;
and
a remote management controller having an EGA shadow look up table and a VGA shadow look up table, the remote management controller being adapted to snoop accesses by the processor to the EGA and VGA color palettes of the video graphics controller, and to create a copy of information in the EGA color palette in the EGA shadow look up table and a copy of information in the VGA color palette in the VGA shadow look up table, wherein information in the EGA shadow look up table and the VGA shadow look up table is used to communicate correct color information to the second computer via the network.

5 more elements

Dependencies are inferred from the claim text.

Method and apparatus for implementing color graphics on a remote computer

Life of this patent

Method and apparatus for implementing color graphics on a remote computer

Life of this patent

Abstract

Claims22