TU81 Streaming Tape Unit: Difference between revisions
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Created page with "thumb|right|200px|A TU81 Big 9-track tape-drivers for heavy backup duties. Category:Tape Drives" |
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{{Infobox Tape drive | |||
| name = TU81 | |||
| tape speed = 75 inch/sec (high speed streaming mode) or 25 inch/sec (start/stop mode or low-speed streaming mode) | |||
| media = standard half-inch tape | |||
| manufacturer = [[Digital Equipment Corporation]] | |||
| tape density = 1600 bpi (PE), 6250 bpi (GCR) | |||
| year introduced = 1984/1985 | |||
}} | |||
[[Image:tu81.jpg|thumb|right|200px|A TU81]] | [[Image:tu81.jpg|thumb|right|200px|A TU81]] | ||
Big 9-track tape- | Big 9-track tape-drives for heavy backup duties. | ||
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). | |||
Two [[6840 PTM|6840]] Programmable Counter / Programmable Timer Module chips are used to count servo tachs. | |||
The firmware is stored in two [[ROM]] chips. | |||
[[Category:Tape Drives]] | [[Category:Tape Drives]] | ||
Revision as of 13:05, 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 |
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.
