Appeal No. 1999-0466
Application 08/530,617
[answer, pages 5-8].
We agree with the position argued by the examiner. As
admitted by appellants, Wingine teaches a system memory
controller and a graphics memory controller. The system
memory controller can access DRAM system memory or VRAM
display memory. However, it does not appear that the system
memory accesses to VRAM in Wingine are made through the
graphics controller (the Wingine controller) as recited in
claim 1. Kelleher teaches that VRAM 20 can be allocated
between graphics memory and system memory. When locations of
VRAM 20 are used as system memory in Kelleher, the processor
50 makes access requests to VRAM 20 through graphics
controller 18. Although Kelleher does not specifically
identify anything as a system controller, the accessing of
VRAM 20 from processor 50 as system memory would have
suggested the presence of a system controller in processor 50
for addressing VRAM 20. Thus, notwithstanding appellants’
arguments to the contrary, we find that Kelleher would have
suggested to the artisan that VRAM can be accessed for system
use by a system controller through a graphics controller. We
agree with the examiner that it would have been obvious for
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