04928237 is referenced by 28 patents and cites 16 patents.

A computer system and method for operating a computer system capable of running in mutually incompatible real and protected addressing modes, in which programs written for one mode can be run in the other mode without modification. The operating system using BIOS assembles two different common data areas for the two modes, each inclusive of device block pointers, function transfer table pointers, data pointers, and function pointers. The common data area for the real mode is assembled first. To assemble the pointers for the protected mode common data area, the offset values from the real mode area are copied directly, and then selector values are inserted whose physical addresses correspond to the segments of the corresponding pointers in the real mode area. The selector values are derived from a segment descriptor table.

Title
Computer system having mode independent addressing
Application Number
7/30789
Publication Number
4928237
Application Date
March 27, 1987
Publication Date
May 22, 1990
Inventor
Gary A Vaiskauckas
Boca Raton
FL, US
Donald D Williams
Boca Raton
FL, US
Guy G Sotomayor
West Palm Beach
FL, US
Robert B Liverman
Raleigh
NC, US
Jeffrey I Krantz
Boca Raton
FL, US
Scott G Kinnear
Boca Raton
FL, US
David J Doria
Boca Raton
FL, US
Richard A Dayan
Boca Raton
FL, US
Richard Bealkowski
Delray Beach
FL, US
Agent
Winfield James Brown Jr
Assignee
International Business Machines
NY, US
IPC
G06F 9/00
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