Browse Prior Art Database

Access to Physical Model Device Internals

IP.com Disclosure Number: IPCOM000034448D
Original Publication Date: 1989-Feb-01
Included in the Prior Art Database: 2005-Jan-27

Publishing Venue

IBM

Related People

Authors:
Dubler, JF Robinson, SG [+details]

Abstract

Disclosed is a method that permits the logic simulation user to have access to the internal states of a device physical model. This permits the same control and observability as a pure software behavior model. For instance, many logic simulators permit the user to interactively read/write "internal variables" in software behaviors. Often times these are counters or mode control registers which define states of a hardware implementation of the behavioral. To initialize these "internal variables" to the desired values may require a long complicated testcases, so directly altering the internal variables may be preferred. Some logic simulators also have special commands to read/write specific types of variables. For example, some simulators have a command to read/write shift register scan registers.