Selective memory transaction monitor system
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United States of America Patent
Stats
-
Dec 27, 1994
Grant Date -
N/A
app pub date -
Jul 31, 1991
filing date -
Jul 31, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A variable value monitoring system and method acquires and displays data information words having addresses within a certain range. In one mode of operation, data information words having addresses within a predetermined range are selected and stored in a shadow RAM and only changes in that data are presented to a viewer. The viewer can select the display format for a panel of data contained within the predetermined range of addresses. A FIFO memory temporarily stores the variable values of selected data information words. A flag memory stores flag bits at internal addresses corresponding to each address in a predetermined block of external addresses. Status bit are provided for each data word addressed by the predetermined block of addresses and means are provided for logically comparing the flag bits with corresponding status bits and for storing a data information word in the FIFO if the logical comparison is true. Display and permanent storage of the FIFO information are provided using a personal computer system.
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