Tape drive system with tape position capture circuitry

Details Tape drive system with tape position capture circuitry Tape drive system with tape position capture circuitry

1986-10-09

1988-06-21

Cardillo, Raymond F.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 744, G11B 509, G11B 1552

Patent

active

047528460

ABSTRACT:
A tape drive system employs position capture circuitry to facilitate accurate positioning of the tape media. The position capture circuitry includes an input polling state machine (101) to ensure each detection results in exactly one position value transfer. A timing section (103) synchronizes the polling of inputs with data transfers. A bus multiplexing section (105) provides for 12-bit resolution over 8-bit busses. The position types can be data block boundaries or reel-encoder marks or position requests by the servo controller. The input lines (41-44) are polled routinely, ensuring that the stored values precisely reflect the referenced positions.

REFERENCES:
patent: 3727203 (1973-04-01), Crossman
patent: 4321632 (1982-03-01), Leis et al.
patent: 4393445 (1983-07-01), Milligan et al.

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