TU81 Streaming Tape Unit - Revision history

Jnc: /* External links */ More accurate cat

2024-04-23T18:32:00Z

External links: More accurate cat

← Older revision		Revision as of 18:32, 23 April 2024
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	* [http://www.bitsavers.org/pdf/dec/brochures/DEC-TA79+TA81-MagneticTapeSubsystems.pdf TA79 and TA81 Magnetic Tape Subsystems] - brochure, similar		* [http://www.bitsavers.org/pdf/dec/brochures/DEC-TA79+TA81-MagneticTapeSubsystems.pdf TA79 and TA81 Magnetic Tape Subsystems] - brochure, similar

	[[Category: ~~DEC~~ Tape Drives]]		[[Category: LESI Tape Drives]]

Jnc: Detail on dual densities; expand info boxes; more docs

2024-04-22T02:56:29Z

Detail on dual densities; expand info boxes; more docs

← Older revision		Revision as of 02:56, 22 April 2024
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	\| imgwidth = 150px		\| imgwidth = 150px
	\| caption = A TU81		\| caption = A TU81
			\| manufacturer = [[Digital Equipment Corporation]]
			\| media = standard half-inch tape
			\| controller = [[KLESI Low-End Storage Interconnect]]<br>KLESI-UA (M8739, [[UNIBUS]]); KLESI-QA (M7740, [[QBUS]]) KLESI-B (T1014, [[VAX Bus Interconnect\|VAXBI]])
			\| interface = [[Low End System Interconnect]]
	\| tape speed = 75 inch/sec (high speed streaming mode) or 25 inch/sec (start/stop mode or low-speed streaming mode)		\| 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)		\| tape density = 1600 bpi (PE), 6250 bpi (GCR)
	\| year introduced = 1984~~/1985~~		\| capacity = 40 MB (1600 bpi, 2K byte blocks)<br>145 MB (6250 bpi, 8K byte blocks)
			\| transfer rate = 40 Kbyte/sec (low speed), 1200 Kbyte/sec (high; 1600 bpi)<br>156 Kbyte/sec (low speed), 469 Kbyte/sec (high; 6250 bpi)
			\| rewind speed = 192 ips (average)
			\| rewind time = 150 secs (nominal, 2,400')
			\| power = 300 VA (standby or loaded)<br>550 VA (maximum)
			\| size = 41.5"H x 21.5"W x 30"D
			\| weight = 295 lbs
			\| year introduced = 1984
	}}		}}
	~~The '''TU81 Streaming Tape Unit''' is a large 9-track [[magnetic tape drive]] 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 [[Random Access Memory\|RAM]] and an internal clock oscillator. There is also a [[6821 PIA\|6821]] [[Parallel Interface Adapter]] [[integrated circuit\|chip]] used for communication between the Servo/Control [[microprocessor]] and the Formatter Write microprocessor (on a different board).		The '''TU81 Streaming Tape Unit''' was a mid-range dual-density, 9-track, streaming, [[ANSI]]-standard [[magnetic tape drive]] for heavy backup duties. <!-- built and sold by -->

			The recording density, of either 1600 bpi (using [[Phase Encoding\|PE]] [[encoding]]) or 6250 bpi (using [[Group Coded Recording\|GCR]] encoding), was selectable by software.

			The TU81 servo/control module used a [[Motorola]] [[MC6802\|6802]] processor, a variant of the [[MC6800\|6800]] with 128 bytes of internal [[Random Access Memory\|RAM]] and an internal clock oscillator. There was also a [[6821 PIA\|6821]] [[Parallel Interface Adapter]] [[integrated circuit\|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 were used to count servo tachs. The [[firmware]] was stored in two [[read-only memory\|ROM]] chips.

			==Further reading==

	~~Two [[6840 PTM\|6840]] Programmable Counter~~ / ~~Programmable Timer Module chips are used to count servo tachs.~~		* ''TU81/TA81 and TU81 PLUS Subsystem User's Guide'' (EK-TUA81-UG)

	~~The [[firmware]] is stored in two [[read-only memory\|ROM]] chips.~~		''No longer available online''

	==External links==		==External links==
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	* [http://www.bitsavers.org/pdf/dec/magtape/tu81/ TU81] - documentation at [[Bitsavers]]		* [http://www.bitsavers.org/pdf/dec/magtape/tu81/ TU81] - documentation at [[Bitsavers]]
	** [http://www.bitsavers.org/pdf/dec/magtape/tu81/EK-TUA81-TM_002_Nov85.pdf EK-TUA81-TM_002 TU81/TA81 Technical Manual]		** [http://www.bitsavers.org/pdf/dec/magtape/tu81/EK-TUA81-TM_002_Nov85.pdf EK-TUA81-TM_002 TU81/TA81 Technical Manual]
			** [http://www.bitsavers.org/pdf/dec/magtape/tu81/EK-TUA81-SV-003_Pathf_Sep85.pdf TU81/TA81 Pathfinder] (EK-TUA81-SV-003)
			** [http://www.bitsavers.org/pdf/dec/magtape/tu81/MP01618_TU81_EngrDrws_Jul84.pdf TU81 Maintenance Print Set]
			* [https://www.vaxhaven.com/images/9/9b/EK-0TU81-PS-002.pdf TU81 Magnetic Tape Subsystem Pocket Service Guide] (EK-0TU81-PS-002)
			* [http://www.bitsavers.org/pdf/dec/brochures/DEC-TA79+TA81-MagneticTapeSubsystems-1986.pdf TA78 and TA81 Magnetic Tape Subsystems] - brochure, covers the TU81 too
			* [http://www.bitsavers.org/pdf/dec/brochures/DEC-TA79+TA81-MagneticTapeSubsystems.pdf TA79 and TA81 Magnetic Tape Subsystems] - brochure, similar

	[[Category: DEC Tape Drives]]		[[Category: DEC Tape Drives]]

Jnc: Move image into infobo

2024-02-08T15:12:32Z

Move image into infobo

← Older revision		Revision as of 15:12, 8 February 2024
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	{{Infobox Tape drive		{{Infobox Tape drive
	\| name = TU81 Streaming Tape Unit		\| name = TU81 Streaming Tape Unit
			\| image = tu81.jpg
			\| imgwidth = 150px
			\| caption = A TU81
	\| tape speed = 75 inch/sec (high speed streaming mode) or 25 inch/sec (start/stop mode or low-speed streaming mode)		\| 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		\| media = standard half-inch tape
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	\| year introduced = 1984/1985		\| year introduced = 1984/1985
	}}		}}

	~~[[Image:tu81.jpg\|thumb\|right\|200px\|A TU81]]~~

	The '''TU81 Streaming Tape Unit''' is a large 9-track [[magnetic tape drive]] for heavy backup duties.		The '''TU81 Streaming Tape Unit''' is a large 9-track [[magnetic tape drive]] for heavy backup duties.

Jnc: Jnc moved page TU81 magtape drive to TU81 Streaming Tape Unit: Actual DEC name

2024-01-09T02:00:49Z

Jnc moved page TU81 magtape drive to TU81 Streaming Tape Unit: Actual DEC name

← Older revision		Revision as of 02:00, 9 January 2024
(No difference)

Jnc: typo

2024-01-09T02:00:33Z

typo

← Older revision		Revision as of 02:00, 9 January 2024
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	[[Image:tu81.jpg\|thumb\|right\|200px\|A TU81]]		[[Image:tu81.jpg\|thumb\|right\|200px\|A TU81]]

	The '''TU81 Streaming Tape Unit'' is a large 9-track [[magnetic tape drive]] for heavy backup duties.		The '''TU81 Streaming Tape Unit''' is a large 9-track [[magnetic tape drive]] 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 [[Random Access Memory\|RAM]] and an internal clock oscillator. There is also a [[6821 PIA\|6821]] [[Parallel Interface Adapter]] [[integrated circuit\|chip]] used for communication between the Servo/Control [[microprocessor]] and the Formatter Write microprocessor (on a different board).		The TU81 servo/control module uses a [[Motorola]] [[MC6802\|6802]] processor, a variant of the [[MC6800\|6800]] with 128 bytes of internal [[Random Access Memory\|RAM]] and an internal clock oscillator. There is also a [[6821 PIA\|6821]] [[Parallel Interface Adapter]] [[integrated circuit\|chip]] used for communication between the Servo/Control [[microprocessor]] and the Formatter Write microprocessor (on a different board).

Jnc: Formal DEC name

2024-01-09T02:00:10Z

Formal DEC name

← Older revision		Revision as of 02:00, 9 January 2024
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	{{Infobox Tape drive		{{Infobox Tape drive
	\| name = TU81		\| name = TU81 Streaming Tape Unit
	\| tape speed = 75 inch/sec (high speed streaming mode) or 25 inch/sec (start/stop mode or low-speed streaming mode)		\| 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		\| media = standard half-inch tape
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	[[Image:tu81.jpg\|thumb\|right\|200px\|A TU81]]		[[Image:tu81.jpg\|thumb\|right\|200px\|A TU81]]

	~~Big~~ 9-track [[magnetic tape drive]] for heavy backup duties.		The '''TU81 Streaming Tape Unit'' is a large 9-track [[magnetic tape drive]] 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 [[Random Access Memory\|RAM]] and an internal clock oscillator. There is also a [[6821 PIA\|6821]] [[Parallel Interface Adapter]] [[~~iIntegrated~~ circuit\|chip]] used for communication between the Servo/Control [[microprocessor]] and the Formatter Write microprocessor (on a different board).		The TU81 servo/control module uses a [[Motorola]] [[MC6802\|6802]] processor, a variant of the [[MC6800\|6800]] with 128 bytes of internal [[Random Access Memory\|RAM]] and an internal clock oscillator. There is also a [[6821 PIA\|6821]] [[Parallel Interface Adapter]] [[integrated circuit\|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.		Two [[6840 PTM\|6840]] Programmable Counter / Programmable Timer Module chips are used to count servo tachs.

Jnc: /* External links */ +Bitsavers doc folder

2024-01-09T00:59:54Z

External links: +Bitsavers doc folder

← Older revision		Revision as of 00:59, 9 January 2024
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	==External links==		==External links==

	* [http://www.bitsavers.org/pdf/dec/magtape/tu81/EK-TUA81-TM_002_Nov85.pdf EK-TUA81-TM_002 TU81/TA81 Technical Manual]		* [http://www.bitsavers.org/pdf/dec/magtape/tu81/ TU81] - documentation at [[Bitsavers]]
			** [http://www.bitsavers.org/pdf/dec/magtape/tu81/EK-TUA81-TM_002_Nov85.pdf EK-TUA81-TM_002 TU81/TA81 Technical Manual]

	[[Category: DEC Tape Drives]]		[[Category: DEC Tape Drives]]

Jnc: Jnc moved page TU81 to TU81 magtape drive: Follow naming system

2022-01-10T22:45:55Z

Jnc moved page TU81 to TU81 magtape drive: Follow naming system

← Older revision		Revision as of 22:45, 10 January 2022
(No difference)

Jnc: /* External links */ +tech manual

2021-08-23T16:34:07Z

External links: +tech manual

← Older revision		Revision as of 16:34, 23 August 2021
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	The [[firmware]] is stored in two [[read-only memory\|ROM]] chips.		The [[firmware]] is stored in two [[read-only memory\|ROM]] chips.

			==External links==

			* [http://www.bitsavers.org/pdf/dec/magtape/tu81/EK-TUA81-TM_002_Nov85.pdf EK-TUA81-TM_002 TU81/TA81 Technical Manual]

	[[Category: DEC Tape Drives]]		[[Category: DEC Tape Drives]]

Jnc: +Links, better cat

2021-08-22T09:38:51Z

+Links, better cat

← Older revision		Revision as of 09:38, 22 August 2021
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	\| year introduced = 1984/1985		\| year introduced = 1984/1985
	}}		}}

	[[Image:tu81.jpg\|thumb\|right\|200px\|A TU81]]		[[Image:tu81.jpg\|thumb\|right\|200px\|A TU81]]

	Big 9-track tape~~-drives~~ for heavy backup duties.		Big 9-track [[magnetic tape drive]] 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).		The TU81 servo/control module uses a [[Motorola]] [[MC6802\|6802]] processor, a variant of the [[MC6800\|6800]] with 128 bytes of internal [[Random Access Memory\|RAM]] and an internal clock oscillator. There is also a [[6821 PIA\|6821]] [[Parallel Interface Adapter]] [[iIntegrated circuit\|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.		Two [[6840 PTM\|6840]] Programmable Counter / Programmable Timer Module chips are used to count servo tachs.

	The firmware is stored in two [[ROM]] chips.		The [[firmware]] is stored in two [[read-only memory\|ROM]] chips.
	[[Category:Tape Drives]]
			[[Category: DEC Tape Drives]]