Excavating
Patent
1979-03-23
1981-06-02
Atkinson, Charles E.
Excavating
364200, G06F 1110
Patent
active
042715180
ABSTRACT:
A data transmission/reception installation with parallel/serial and serial/parallel character conversion is disclosed which relieves the respective local data processing installation of all tasks connected with data transmission procedures. Both a temporal vitiation of the data processing operations as well as a reduction of the memory capacity available for the data processing operations are avoided. The data transmission/reception installation disclosed has a data transmission processor arranged within the respective data processing system between the local data processing installation and a data modem terminating a data line for controlling data transmission and reception procedures. The data transmission processor contains at least one microprocessor and a transcribable program memory. A cyclic redundancy check generator is provided by means of which a data transmission and reception monitoring corresponding to a stored test program can be carried out.
REFERENCES:
patent: 3825905 (1974-07-01), Allen, Jr.
patent: 3842405 (1974-10-01), Key et al.
patent: 4100601 (1978-07-01), Kaufman et al.
patent: 4103328 (1978-07-01), Dalmasso
patent: 4106092 (1978-08-01), Millers
Microprocessor Modules Data Book, System SAB 8080, Published by Siemens AG, 1976/77, pp. 63-79.
Birzele Paul
Geitz Gerhard
Atkinson Charles E.
Siemens Aktiengesellschaft
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