Taximeter

Details Taximeter Taximeter

1977-07-18

1980-05-27

Zache, Raulfe B.

Boots, shoes, and leggings

364467, 235 30R, G07B 1310

Patent

active

042053889

ABSTRACT:
The invention relates to a dedicated microprocessor for an electronic taximeter, and a taximeter including the microprocessor. The microprocessor includes, (a) a main memory for storing data at a plurality of storage locations therein; (b) a data memory for receiving input data at a plurality of storage locations therein; (c) a combiner for combining the data storage locations of the main memory with the input data of respective storage locations of the data memory for updating the main memory; (d) a program memory for controlling the operation of the data memory, and comprising a plurality of storage locations therein; (e) a counter for sequentially selecting the storage locations of the main memory and the program memory; and (f) clock means for driving the counter means through its cycle. The main memory means is preferably a random access memory (RAM), and the data memory means and the program memory means can comprise, respectively, first and second read only memory (ROM) means. Each of the storage locations of the RAM and the first ROM comprise four bits of information whereby a single binary coded digit (BCD) can be stored at each of the aforesaid storage locations, and the combiner is preferably a BCD adder.

REFERENCES:
patent: 3860806 (1975-01-01), Fichter et al.
patent: 3860807 (1975-01-01), Fichter et al.
patent: 3931508 (1976-01-01), Kelch
patent: 3937933 (1976-02-01), Warkentin
patent: 3953720 (1976-04-01), Kelch
patent: 4024384 (1977-05-01), Tateishi et al.
Electrical Design News, vol. 22, No. 6, Mar. 1977.

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