Difference between revisions of "TU81 Streaming Tape Unit"

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(Created page with "thumb|right|200px|A TU81 Big 9-track tape-drivers for heavy backup duties. Category:Tape Drives")
 
(Added infobox and a bit)
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{{Infobox Tape drive
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| name = TU81
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| tape speed = 75 inch/sec (high speed streaming mode) or 25 inch/sec (start/stop mode or low-speed streaming mode)
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| media = standard half-inch tape
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| manufacturer = [[Digital Equipment Corporation]]
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| tape density = 1600 bpi (PE), 6250 bpi (GCR)
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| year introduced = 1984/1985
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}}
 
[[Image:tu81.jpg|thumb|right|200px|A TU81]]
 
[[Image:tu81.jpg|thumb|right|200px|A TU81]]
  
Big 9-track tape-drivers for heavy backup duties.
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Big 9-track tape-drives for heavy backup duties.
  
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The TU81 servo/control module uses a [[Motorola]] [[MC6802|6802]] processor, a variant of the [[MC6800|6800]] with 128 bytes of internal RAM and an internal clock oscillator. There is also a [[6821 PIA|6821]] [[PIA| Parallel Interface Adapter]] chip used for communication between the Servo/Control microprocessor and the Formatter Write microprocessor (on a different board).
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Two [[6840 PTM|6840]] Programmable Counter / Programmable Timer Module chips are used to count servo tachs.
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The firmware is stored in two [[ROM]] chips.
 
[[Category:Tape Drives]]
 
[[Category:Tape Drives]]

Revision as of 14:05, 7 March 2013


TU81
Manufacturer: Digital Equipment Corporation
Media: standard half-inch tape
Tape density: 1600 bpi (PE), 6250 bpi (GCR)
Tape speed: 75 inch/sec (high speed streaming mode) or 25 inch/sec (start/stop mode or low-speed streaming mode)
Year Introduced: 1984/1985
A TU81

Big 9-track tape-drives for heavy backup duties.

The TU81 servo/control module uses a Motorola 6802 processor, a variant of the 6800 with 128 bytes of internal RAM and an internal clock oscillator. There is also a 6821 Parallel Interface Adapter chip used for communication between the Servo/Control microprocessor and the Formatter Write microprocessor (on a different board).

Two 6840 Programmable Counter / Programmable Timer Module chips are used to count servo tachs.

The firmware is stored in two ROM chips.