Appeal No. 1998-0927
Application No. 08/343,939
mode being based on the moving distance from a
current track position to a target track.
Funches states that the servo microprocessor 96 (Figures
4 and 6) services interrupts every 42 microseconds with the
interrupt service routine (ISR) (column 14, lines 54 and 55,
and column 17, lines 23 through 32). During the ISR, the mode
that is selected to move the head to a desired track on the
disk recording media depends upon the distance from the
current position of the head to the desired track (column 17,
line 68 through column 18, line 8). Although the main ISR
services both the search and the transition modes of the seek
mode in Funches, nothing in the claims on appeal precludes the
use of the same ISR to service both of the modes. When the
ISR services the search mode it becomes a search mode
interrupt service routine, and when it services the transition
mode, it becomes a transition mode interrupt service routine.
The same holds true for the FINE CONTROL or track following
mode “during subsequent interrupt services” (column 18, lines
58 through 64). Even if the ISR is not applied to the three
different modes, we note that claim 15 only requires that the
ISR be applied to a selected “one” of the three different
modes, and that only “one” of the three different interrupt
5
Page: Previous 1 2 3 4 5 6 7 8 Next
Last modified: November 3, 2007