Roderick L Dorris, Age 721403 Buffalo Cyn Dr, Dripping Springs, TX 78620

5341320, Aug 23, 1994

Mar 1, 1993

8/024011

David W. Trissel - Austin TX
Roderick L. Dorris - Austin TX
Stuart A. Werbner - Austin TX

Motorola, Inc. - Schaumburg IL

G06F 738

364748

A method for processing exception conditions in a floating-point system (40) begins by determining in hardware that an exception will occur (14) for a given floating-point operation and operand(s). After the hardware determines that an exception is to occur, an exception handler is invoked from software. The exception handler numerically alters the operands to create biased operands which may be processed by the hardware (20) via the given floating-point operation without creating another exception condition. The biased operands are then processed by the hardware via the given floating-point operation to produce a biased floating-point result. The biased floating-point result is unbiased (22) by the exception handler to achieve an unbiased result. The speed of floating-point exception handling is improved by using biasing techniques and both software and hardware to mathematically resolve floating-point exceptions to correct unbiased results.

5867710, Feb 2, 1999

Sep 5, 1995

8/523178

Roderick Lee Dorris - Austin TX
Eric Nassar Robertson - Austin TX

Motorola, Inc. - Austin TX

G06F 1134

395704

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).

2021033, Oct 28, 2021

Apr 23, 2020

16/856210

- Austin TX, US
Roderick Lee Dorris - Dripping Springs TX, US

G06F 12/0873
G06F 12/0846
G06F 12/0831
G06F 12/14
G06F 9/46
G06F 9/30

A Remap Address Space Controller controls access to an address space by selectively remapping a physical address of a transaction received from a controller to form a remapped physical address according to a current execution context of the controller. The selective remapping is based on a determination of whether the current execution context of the controller allows the transaction to access the address space. Remap Address Space Controller selectively provides the transaction with the remapped physical address to a memory bus based on the determination of whether the current execution context of the controller allows the transaction to access the address space.