TU81: Difference between revisions

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Revision as of 15:45, 25 March 2007

Background

The TU81 was a dual-density, 9-track, ANSI standard 1/2-inch magnetic tape subsystem built and sold by Digital Equipment Corporation. The tape drive appeared under TU81, TU81 Plus, and TA81 model designations. The main difference between the TU81 and TA81 models was the communications interface. The TU81 Plus included a 256Kb cache to improve performance.

General Specifications

Capacity (732 meter/2400 foot tape):

      1600 bits/inch: 40Mbytes
      6250 bits/inch: 140MB

Data Transfer Rate: 40Kbytes/s to 469 KB/s

Speed:

      Low Speed, Start/Stop: 63.5 cm/s (24 in/s)
      Low Speed, Streaming:  63.5 cm/s (24 in/s)
      High Speed, Streaming: 190.5cm/s (75 in/s)

Model Specific Specifications

TU-81

Interface: Unibus

TU-81 Plus

Interface: Unibus, BI-Bus, Q22-Bus

TA81

Interface: HSC

Sources

TU81/TA81 and TU81 Plus Subsystem User's Guide.

@@ Line 1: / Line 1: @@
 {{Orphan|November 2006}}
-== Background ==
+==Background==
-The '''TU81''' is a dual-density, 9-track, [[ANSI]] standard 1/2-inch magnetic tape subsystem built and sold by [[Digital Equipment Corporation]].  The tape drive appeared under TU81, TU81 Plus, and TA81 model designations.  The main difference between the TU81 and TA81 models was the communications interface.  The TU81 Plus included a 256Kb cache to improve performance.
+The '''TU81''' was a dual-density, 9-track, [[ANSI]] standard 1/2-inch magnetic tape subsystem built and sold by [[Digital Equipment Corporation]].  The tape drive appeared under TU81, TU81 Plus, and TA81 model designations.  The main difference between the TU81 and TA81 models was the communications interface.  The TU81 Plus included a 256Kb cache to improve performance.
+==General Specifications==
-Information in this post was derived from the ''TU81/TA81 and TU81 Plus Subsystem User's Guide''.
-=== General Specifications ===
 Capacity (732 meter/2400 foot tape):
@@ Line 20: / Line 18: @@
        High Speed, Streaming: 190.5cm/s (75 in/s)
-=== Model Specific Specifications ===
+==Model Specific Specifications==
-==== TU-81 ====
+===TU-81===
+Interface: [[Unibus]]
+===TU-81 Plus===
-Interface: Unibus
+Interface: Unibus, [[BI-Bus]], [[QBus|Q22-Bus]]
-==== TU-81 Plus ====
+===TA81===
-Interface: Unibus, BI-Bus, Q22-Bus
+Interface: [[HSC]]
-==== TA81 ====
+==Sources==
-Interface: HSC
+''TU81/TA81 and TU81 Plus Subsystem User's Guide''.