Method and apparatus for monitoring electronic apparatus activity

Claim 3

The system activity monitor of claim 1 wherein the means for modifying the contents of the identified storage register increments the contents of the identified storage register.

Claim 4

The system activity monitor of claim 1 including means for displaying the contents of the first plurality of storage registers while the electronic apparatus is operating.

Claim 5

The system activity monitor of claim 1 wherein the predetermined pattern includes both present and past values for the first plurality of signals.

Claim 6

The system activity monitor of claim 1 wherein the second means include storage means for storing an address, wherein said address is for identifying one register of said first plurality of registers, and wherein in response to said second plurality of signals a new address value is loaded into said storage means.

Claim 7

The system activity of claim 5 including means responsive to a fourth plurality of signals from the electronic apparatus for producing an inhibit signal input to the second means for inhibiting the loading of a new address value into the storage means, notwithstanding the states of the second plurality of signals.

Claim 8

The system activity monitor of claim 1 wherein the second means include storage means for storing an address, wherein said address is for identifying one register of said first plurality of registers, and wherein, in response to said second plurality of signals, said address is incremented.

Claim 9

The system activity monitor of claim 7 including means responsive to a fourth plurality of signals from the electronic apparatus for producing an inhibit signal input to the second means for inhibiting the incrementation of the address, notwithstanding the states of the second plurality of signals.

Claim 10

The system activity monitor of claim 1 including a second plurality of registers for storing a plurality of predetermined patterns and including fourth means responsive to a third plurality of signals from the electronic apparatus for producing a modification signal in response thereto, and including a sample counter for storing an address, wherein said sample counter is responsive to said modification signal for changing said address, and wherein said address is for identifying one of said predetermined patterns for use by the means for producing the event signal.

Claim 11

The system activity monitor of claim 9 wherein the modification signals increments the address in the sample counter.

Claim 12

The system activity monitor of claim 9 wherein the modification signal loads a new address into the sample counter.

Claim 15

For events of variable duration occurring in an electronic apparatus, wherein the duration of each event is measured by the number of fixed-length intervals occurring during each event, said apparatus comprising; means responsive to at least one signal from the electronic apparatus for producing an event signal defining the beginning and the end of each event; first register means for storing the duration squared; means for producing a delineation signal to delineate each fixed-length interval; first count means responsive to said delineation signal for counting the number of fixed-length intervals during each event; means for multiplying said count by two; first adder means for adding one to said multiplied count to produce a first sum; second adder means for adding said first sum and said duration squared from said first register means to produce a second sum, and for storing said second sum in said first register means at the beginning of each fixed-length interval; wherein when the event has ended, the contents of said first register means is the square of the number of fixed length intervals in the event

Claim 16

For events of variable duration occurring in an electronic apparatus, wherein the duration of each event is measured by the number of fixed-length intervals occurring during each event, said apparatus comprising; means responsive to at least one signal from the electronic apparatus for producing an event signal defining the beginning and the end of each event; first register means for storing the duration squared; means for producing a delineation signal to delineate each fixed-length interval; first count means responsive to said delineation signal for counting the number of fixed-length intervals during each event; means for multiplying said count by two; first adder means for adding one to said multiplied count to produce a first sum; second adder means for adding said first sum and said duration squared from said first register means to produce a second sum, and for storing said second sum in said first register means at the beginning of each fixed-length interval; wherein when the event has ended, the contents of said first register means is the square of the number of fixed length intervals in the event

Claim 17

The apparatus of claim 13 wherein the apparatus calculates the duration squared for a plurality of events, and wherein the apparatus includes a second register means wherein at the end of each event the values stored in the first register means are input to said second register means, and wherein the apparatus includes a second adder means for summing the contents of the first register means and the contents of said second register means, wherein the sum is stored in said register means at the beginning of each event.

Claim 18

The apparatus of claim 14 including a second counter means for counting the number of event, and calculating means for calculating the variance of the duration squared values stored in the second register means, from ##EQU12## wherein σ 2 is the variance, n is the number of events counted by said second counter means, X i is the duration of the ith event and ##EQU13## is the sum of the durations squared stored in the second register means.