Browse Prior Art Database

Processor Inhibit using Trace Array Trigger Function

IP.com Disclosure Number: IPCOM000109681D
Original Publication Date: 1992-Sep-01
Included in the Prior Art Database: 2005-Mar-24
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Paulson, PJ: AUTHOR [+3]

Abstract

The trigger function of an on-chip or on module logic analyzer (trace array) is used to generate a processor inhibit. Microcode is used to control the initialization and operation of the inhibit function.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 81% of the total text.

Processor Inhibit using Trace Array Trigger Function

       The trigger function of an on-chip or on module logic
analyzer (trace array) is used to generate a processor inhibit.
Microcode is used to control the initialization and operation of the
inhibit function.

      The logic analyzer's trigger function is enhanced by adding a
counter.  The counter allows the inhibit to be enabled for a set
length of time.

      The trigger function of an internal logic analyzer (trace
array) is used to generate a processor inhibit.  Microcode is used to
program the inhibit function.

      Microcode initializes the Trace Array-1 to enable the inhibit
function.  The initialization includes loading the Control Register-2
to:
o  Enable Inhibit Function
     -  Enable Bus Cycle Steal
     -  Enable Processor Hold-Off
     -  Enable Other types of inhibit
o  Select Beginning inhibit condition
     -  Select Single Trigger
     -  Select Multiple Sequential Triggers
o  Select Ending inhibit condition
     -  End on Single Trigger
     -  End on Multiple Sequential Triggers
     -  End on Count=0
     -  End on Trigger after Count=0
o  Set Length of Count

      A trigger condition is used to start the inhibit and then a
second trigger condition and/or a completed count is used to end the
inhibit.  When a trigger occurs in the Trigger Logic-3, the Inhibit
Control-4 starts driving the appropriate Processor Inhibit-5 li...