Appeal No. 1997-3821
Application No. 08/570,256
computer. However,
unlike appellant's expansion circuit boards, Morgan's
expansion cards do not have microcontrollers. Instead, Morgan
employs a central memory controller 30 located on the CPU
board 15. The memory controller 30 includes a configuration
status register 40 having configuration register circuits3
(200 in Fig. 2) for storing configuration data received over
memory data bus 65 from the memory boards. Bank status
register circuits 200
each include a configuration register 202, a
multiplexer 205, and a comparator 210. Each
configuration register 202 contains configuration
data about the memory bank corresponding to the
bank status register circuit containing that
configuration register. Bank status register
circuits 200 cumulatively represent the configuration
structure of the entire memory. [Col. 4, lines
61-68.]
In the preferred embodiment of memory board 70 shown in Fig.
5, signature register 160 holds configuration data for the
corresponding memory banks on memory board 70 (col. 9, lines
42-45.) Preferably, the signature register is a set of pins
which are connected to voltage sources each representing
3Labeled in Figure 1 as a ?CONTROL STATUS REGISTER."
9
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