Boots – shoes – and leggings
Patent
1976-10-27
1978-11-14
Malzahn, David H.
Boots, shoes, and leggings
364781, G06F 750
Patent
active
041258673
ABSTRACT:
An electronic calculator or microprocessor system of the type preferably having keyboard input and a visual display is implemented with a semiconductor chip having a hexadecimal/binary coded decimal format arithmetic unit for performing arithmetic operations on numeric data inputted by the keyboard further, the system preferably includes an input, an address register responsive to the input, a instruction word memory for storing a number of instruction words and addressable in response to the address stored in the address register, and instruction word decoder logic for decoding instruction words outputted from the instruction word memory and for controlling the arithmetic unit in response thereto. The arithmetic unit is operable in a first mode for providing an output from the arithmetic unit in binary coded decimal format and in a second mode providing an output from the arithmetic unit in hexadecimal format.
REFERENCES:
patent: 3596074 (1971-07-01), Mitrofanoff
patent: 3648246 (1972-03-01), Zurla
patent: 3694642 (1972-09-01), Grannis
patent: 3752394 (1973-08-01), Igel
patent: 3760171 (1973-09-01), Wang et al.
patent: 3919536 (1975-11-01), Cochran et al.
patent: 4001570 (1977-01-01), Gooding et al.
Berg Richard P.
Grossman Rene E.
Malzahn David H.
Texas Instruments Incorporated
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