TU81 Streaming Tape Unit - Revision history

Jnc: /* External links */ More accurate cat

2024-04-23T18:32:00Z

‎External links: More accurate cat

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

2024-04-22T02:56:29Z

Detail on dual densities; expand info boxes; more docs

Jnc: Move image into infobo

2024-02-08T15:12:32Z

Move image into infobo

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

Jnc: typo

2024-01-09T02:00:33Z

typo

Jnc: Formal DEC name

2024-01-09T02:00:10Z

Formal DEC name

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

2024-01-09T00:59:54Z

‎External links: +Bitsavers doc folder

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

Jnc: /* External links */ +tech manual

2021-08-23T16:34:07Z

‎External links: +tech manual

Jnc: +Links, better cat

2021-08-22T09:38:51Z

+Links, better cat

← Older revision		Revision as of 18:32, 23 April 2024
Line 44:		Line 44:
	* [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]]

@@ Line 4: / Line 4: @@
 | 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 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)
 }}
-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 -->
-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==
@@ Line 22: / Line 38: @@
 * [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]]

@@ Line 1: / Line 1: @@
 {{Infobox Tape drive
 | 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)
 | media = standard half-inch tape
@@ Line 7: / Line 10: @@
 | year introduced = 1984/1985
 }}
 The '''TU81 Streaming Tape Unit''' is a large 9-track [[magnetic tape drive]] for heavy backup duties.

@@ Line 10: / Line 10: @@
 [[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).

@@ Line 1: / Line 1: @@
 {{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)
 | media = standard half-inch tape
@@ Line 10: / Line 10: @@
 [[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.

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

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

← Older revision		Revision as of 16:34, 23 August 2021
Line 17:		Line 17:

	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]]