Abstract: A method for dynamically caching data objects in a logical cache memory begins by organizing the logical cache memory into a set of maximally equally-sized, contiguous pages that begin at a logical cache base address. Any one of the maximal size logical cache pages may be dynamically subdivided into a set of smaller pages of equal size. The smaller size pages cache data objects having a smaller size than the maximum possible data object size. Each subdivided page stores only those smaller size data objects. The logical address for a page is mapped to at least a maximal size page index identifying the position of the maximal size logical page in the cache and, if the page is a smaller size page, the page location is also mapped to a smaller size page index which identifies a particular one of the smaller size pages located within a maximal size page. Pages are dynamically reconfigured based on a least-recently-used policy.

Abstract: The present invention is directed to an improved mobile data processing device and a method of operating a mobile data processing device. The mobile data processing device includes a relatively small display screen. The present invention utilization by the mobile data processing device of an application which includes a plurality of screens which have been written for use in a data processing system having a relatively large display screen. When the application is loaded into the mobile data processing device and started, at least a portion of a particular one of the plurality of screens of the application is displayed on the relatively small display screen of the mobile data processing device. Next, the mobile data processing device is utilized to determine whether or not display items from said particular one of said plurality of screens are not fully displayed within said relatively small display screen of said mobile data processing device.

Abstract: A lossless bandwidth compression method for use in a distributed processor system for communicating graphical text data from a remote application server to a user workstation over a low bandwidth transport mechanism enables the workstation display to support the illusion that the application program is running locally rather than at the remote application server. At the application server, the graphical text data is represented by a string of glyphs, each glyph being a bit mask representing the foreground/background state of the graphical text data pixels. Each unique glyph is encoded by assigning a unique identification code (IDC). Each IDC is compared with the previous IDCs in the string and, if a match is found, the IDC is transmitted to the workstation. If a match with a prior IDC is not found, the IDC and the corresponding glyph pattern are transmitted to the workstation.

Abstract: A lossless bandwidth compression method for use in a distributed processor system for communicating graphical text data from a remote application server to a user workstation over a low bandwidth transport mechanism enables the workstation display to support the illusion that the application program is running locally rather than at the remote application server. At the application server, the graphical text data is represented by a string of glyphs, each glyph being a bit mask representing the foreground/background state of the graphical text data pixels. Each unique glyph is encoded by assigning a unique identification code (IDC). Each IDC is compared with the previous IDCs in the string and, if a match is found, the IDC is transmitted to the workstation. If a match with a prior IDC is not found, the IDC and the corresponding glyph pattern are transmitted to the workstation.

Abstract: A method for dynamically caching data objects in a logical cache memory begins by organizing the logical cache memory into a set of maximally equally-sized, contiguous pages that begin at a logical cache base address. Any one of the maximal size logical cache pages may be dynamically subdivided into a set of smaller pages of equal size. The smaller size pages cache data objects having a smaller size than the maximum possible data object size. Each subdivided page stores only those smaller size data objects. The logical address for a page is mapped to at least a maximal size page index identifying the position of the maximal size logical page in the cache and, if the page is a smaller size page, the page location is also mapped to a smaller size page index which identifies a particular one of the smaller size pages located within a maximal size page. Pages are dynamically reconfigured based on a least-recently-used policy.