Barry B. Mead - Mesa AZ Gerald V. Piosenka - Scottsdale AZ
Assignee:
Motorola, Inc. - Schaumburg IL
International Classification:
G06F 1110
US Classification:
371 37
Abstract:
Method and apparatus for operating a CRC in a parallel, quasi parallel or serial fashion. The device allows all the bits in a word to be read and loaded into the cyclic redundancy checker (CRC) register in one clock cycle putting it in sync with the rest of the system. The CRC consists of a set of logic gates for converting a parallel input signal to a converted parallel input signal that is the equivalent of the conversion performed on the serial data input into the prior art cyclic redundancy checkers. The bits of the converted parallel input signal are then combined in another set of logic gates to provide the CRC output.
Gerald V. Piosenka - Scottsdale AZ Barry B. Mead - Mesa AZ
Assignee:
Motorola, Inc. - Schaumburg IL
International Classification:
H03B 2900
US Classification:
331 78
Abstract:
An apparatus and method is disclosed that provides a random data generator that is less susceptible to error sources resulting from negative feedback biasing. This invention utilizes a shift register and a multiplexer, controlled by the shift register, to provide the feedback to an amplifier. This improves the correlation between the present data output bit and the following bit.
Gerald V. Piosenka - Scottsdale AZ Barry B. Mead - Mesa AZ
Assignee:
Motorola, Inc. - Schaumburg IL
International Classification:
H04L 900
US Classification:
178 2208
Abstract:
An apparatus and method is disclosed for the protection of computer programs through the use of the principles of conditional inversion and permutation. These security features are designed as part of the chip in a fashion to minimize the changes required to any existing microprocessor design and to be transparent to firmware execution. The programs are first encrypted by permutation which reorders the lines according to an allocated scheme and then conditionally inverted through a set of dual input exclusive OR gates. The reordering of lines in the permutator and the conditional inversion in the inverter are accomplished through the use of variables some of which are permanently prestored in the microprocessor and some of which are entered by the programmer.
UKBarry Mead Ltd at Barry Mead Past: Aviation Operations Manager at Match Event Services Pty, Travel Consultant at Tour Tours /... I am a seasoned event travel specialist/contractor with over 35 years experiance dealing with some of the most challenging, but rewarding clients in the sports... I am a seasoned event travel specialist/contractor with over 35 years experiance dealing with some of the most challenging, but rewarding clients in the sports / music / entertainment industries.
My expertise lies in understanding the end to end process of a major event / tour.
Clients have...
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