Data input/output unit
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United States of America Patent
Stats
-
Jan 13, 1987
Grant Date -
N/A
app pub date -
Sep 28, 1984
filing date -
Oct 16, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Disclosed is a data input/output unit which is equipped with a control device (1), a tape puncher (5), a tape reader (4) and a printer (6), and which is capable of operating even in response to a command from a host computer. The tape puncher (5) is provided with a counter (5h) for counting the number of print characters in one block, a parity designating circuit (5i) for determining a parity change indicated by a value counted by the counter, and a puncher control circuit (5c) capable of adding or erasing a parity code. The puncher control circuit (5c) performs an addition or erasure of a parity code in response to a parity signal from the parity designating circuit (5i).
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