Appeal No. 1999-2252
Application 08/780,790
(figure 2, item 270) between a memory object (figure 2, item
125) associated with a fast buffer (figure 2, item 115) and a
sink device (figure 2, item 130). The computer system
comprises a processor (figure 2, item 160; specification, page
6, lines 21-22), a main memory (figure 2, item 110), a source
(figure 2, item 120), and a sink (figure 2, item 130). The
main memory comprises an application instructions storage
(figure 2, item 180; specification, page 6, lines 12-19), an
operating system instructions storage (figure 2, item 170),
and a fast buffer (figure 2, item 115). The source comprises
a memory object (figure 2, item 125). A buffer mapping
(figure 1, item 140) establishes an association between the
memory object and the fast buffer.
When the data are not modified, the memory object is
transferred from the source to the sink via a first data path
data transfer (figure 1, item 150; specification, page 6,
lines 22-23). When the data are partially modified, the data
are transferred from the source to the sink via two data
paths. A first data path (figure 2, item 270) is used for
unmodified data and a second path (figure 2, item 250) is used
for modified data. The unmodified data path transfers data
2
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