The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 02, 1999
Filed:
Sep. 05, 1995
Applicant:
Inventors:
Roderick Lee Dorris, Austin, TX (US);
Eric Nassar Robertson, Austin, TX (US);
Assignee:
Motorola, Inc., Austin, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395704 ; 395681 ;
Abstract
A Hardware Abstraction Layer (HAL) (66) of a Portable Microkernel Operating System (OS) is tested and verified by loading a HAL test program (96) into Kernel Space (60) as a device driver. This allows direct access to the HAL layer (66) and to the computer hardware accessed by the HAL layer (66). The HAL test program (96) makes HAL layer requests, then verifies HAL (66) operation by directly examining the hardware affected by the HAL request. The HAL test program (96) is controlled by either an external HAL test system (98), or by a HAL control program (99) executing in User space (62).