Difference between revisions of "TM02 magtape controller"

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The '''TM02''' magtape controller is a [[MASSBUS]] device controller, used with 1/2" magtape drives; supported drives include the [[TU16]] and [[TE16]] (both at 45 inches per second). It can handle 800 bits/inch ([[NRZI]]) and 1600 bits/inch (PE - Phase Encoded).
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The '''TM02''' [[magnetic tape controller|magtape formatter]] is a [[MASSBUS]] device controller, used with 1/2" [[magnetic tape drive]]s; supported drives include the [[TU16 magtape drive|TU16]] and [[TE16 magtape drive|TE16]] (both at 45 inches per second). It can handle 800 bits/inch ([[NRZI]]) and 1600 bits/inch (PE - Phase Encoded).
  
A TM02 can control up to 8 drives, although the TM02 and drives count as only a single MASSBUS entity. The TM02 controller connects to all the drives over a 'slave bus'; all the drives are identical (unlike in the [[TM11]]/[[TU10]] system.
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A TM02 can control up to 8 drives, although the TM02 and drives count as only a single MASSBUS entity. The TM02 controller connects to all the drives over a 'slave bus'; all the drives are identical (unlike in the [[TM11 magtape controller|TM11]]/[[TU10 magtape drive|TU10]] system.
  
 
==Implementation==
 
==Implementation==

Revision as of 14:38, 19 January 2018

The TM02 magtape formatter is a MASSBUS device controller, used with 1/2" magnetic tape drives; supported drives include the TU16 and TE16 (both at 45 inches per second). It can handle 800 bits/inch (NRZI) and 1600 bits/inch (PE - Phase Encoded).

A TM02 can control up to 8 drives, although the TM02 and drives count as only a single MASSBUS entity. The TM02 controller connects to all the drives over a 'slave bus'; all the drives are identical (unlike in the TM11/TU10 system.

Implementation

The TM02 is implemented as a set of boards, all of which plug into a custom hex-high nine-slot backplane, usually mounted in a special box in the first tape drive rack. The modules include two hex-size boards, seven quad-size modules, and six dual-high modules.

The hex modules are:

  • M8909 - MASSBUS Interface
  • Bit Fiddler
    • M8906 for use with a PDP-11
    • M8914 for use with a PDP-10

The quad modules are:

  • 3 x M8901 - Data Sync (PE)
  • M8902 - Tape Control (PE)
  • M8903 - Tape Control Common Mode
  • M8904 - Tape Control (NRZI)
  • M8905 - Maintenance Register

The dual modules are:

  • M8907 - Control and Write Drivers
  • M8908-YA
  • M8908
  • 3 x M5903 or M5903-YA

The first three are the drive slave bus interface; the last three are the MASSBUS interface.

Drive bus