TU79 - Revision history

Jnc: Split joined TU79 page up, into one for each

2024-04-21T20:13:10Z

Split joined TU79 page up, into one for each

Jnc: /* Later TU79 */ DEC sales brochure maintained that the changes from the TU78 were not just cosmetic

2024-04-20T17:29:06Z

‎Later TU79: DEC sales brochure maintained that the changes from the TU78 were not just cosmetic

Jnc: Clarify what later TU79 was

2024-04-20T16:28:29Z

Clarify what later TU79 was

Jnc: A start

2024-02-09T19:40:50Z

A start

New page

'''TU79''' was the name used for two entirely different [[magnetic tape drive]]s from [[Digital Equipment Corporation|DEC]]: one from the late 1960's, and one from the late 1980's.

==Early TU79==

Very little is known of this one: it operated at "75 in/s [tape motion rate] with a maximum transfer rate of 60 kc". It could be configured with either 7-track or 9-track [[head]]. It could be used on either that [[PDP-9]] (with the [[TC59 Tape Control Unit]]), or the [[PDP-10]] (with the [[TM10 Magnetic Tape Control]]).

==Later TU79==

The later TU79 seems to be a [[TA79]] configured to have a [[MASSBUS]] interface.

==Further reading==

===Later TU79===

* ''TA79, TU79 Magnetic Tape Subsystem Service Manual'' (EK-OTA79-SV)
* ''TA79, TU79 Magnetic Tape Subsystem Installation Manual'' (EK-OTA79-IN)
* ''TA79, TU79 Magnetic Tape Subsystem Owner's Manual'' (EK-OTA79-OM)

''None online''

==External links==

===Early TU79===

* [http://www.bitsavers.org/pdf/dec/pdp9/DEC-9A-I3BA-D_TC-59_Nov67.pdf TC-59 Magnetic Tape Control Instruction Manual] - mentioned on pg. 1-1 (pg. 8 of the PDF)
* [http://bitsavers.org/pdf/dec/pdp10/periph/DEC-10-I4AA-D_TM10_Maint_Aug68.pdf TM10 Magnetic Tape Control Maintenance Manual] (DEC-10-I4AA-D) - mentioned very briefly on pg. 1-1 (pg. 8 of the PDF)
* [https://www.computerhistory.org/collections/catalog/102756716 TU79 magnetic tape drive] - catalog entry for publicity photos, April 1969

===Later TU79===

* [http://www.bitsavers.org/pdf/dec/magtape/ta79/EK-OTA79-TM-001_Mar88.pdf TA79, TU79, TA78, TU78 Magnetic Tape Subsystem Technical Manual] (EK-OTA79-TM-001)
* [http://www.bitsavers.org/pdf/dec/brochures/DEC-TA79+TA81-MagneticTapeSubsystems.pdf TA79 and TA81 Magnetic Tape Subsystems] - sales brochure; covers the TU79 also

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

@@ Line 7: / Line 7: @@
 ==Later TU79==
-The later TU79 seems to be a [[TU78 Magnetic Tape Transport|TU78]] with minor cosmetic changes; it is configured to have a [[MASSBUS]] interface.
+The later TU79 seems to be a [[TU78 Magnetic Tape Transport|TU78]] with minor changes. Although one rumour had it that the changes were mostly cosmetic, a DEC sales brochure maintained that "Re-designed read/write electronics dramatically reduce the .. soft error rate ... These changes also improve the drive's ability to read tapes of marginal quality ... Mechanical changes (re-designed card cage, improved door, and a new power supply) .. enhance the drive's reliability, reduce the need for Field Service adjustments".
 ==Further reading==

@@ Line 1: / Line 1: @@
-'''TU79''' was the name used for two entirely different [[magnetic tape drive]]s from [[Digital Equipment Corporation|DEC]]: one from the late 1960's, and one from the late 1980's.
+'''TU79''' was the name used for two entirely different [[magnetic tape drive]]s from [[Digital Equipment Corporation|DEC]]:
-==Early TU79==
+* [[TU-79 Tape Transport]], from the late 1960's;
-Very little is known of this one: it operated at "75 in/s [tape motion rate] with a maximum transfer rate of 60 kc". It could be configured with either 7-track or 9-track [[head]]. It could be used on either that [[PDP-9]] (with the [[TC59 Tape Control Unit]]), or the [[PDP-10]] (with the [[TM10 Magnetic Tape Control]]).
+{{disambiguation}}