Difference between revisions of "TM02 magtape controller"
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A TM02 can control up to 8 drives, although the TM02 and drives count as only a single MASSBUS device. 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. | A TM02 can control up to 8 drives, although the TM02 and drives count as only a single MASSBUS device. 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. | ||
| − | The TU16/TM02 with an [[RH11 MASSBUS controller|RH11]] MASSBUS interface is denominated as a '''TJU16'''. | + | The TU16/TM02 with an [[RH11 MASSBUS controller|RH11]] MASSBUS interface is denominated as a '''TJU16'''; with the [[RH70 MASSBUS controller|RH70]] MASSBUS interface of the [[PDP-11/70]], it is denominated as a '''TWU16'''. |
==Implementation== | ==Implementation== | ||
Revision as of 18:17, 23 August 2021
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 device. The TM02 controller connects to all the drives over a 'slave bus'; all the drives are identical (unlike in the TM11/TU10 system.
The TU16/TM02 with an RH11 MASSBUS interface is denominated as a TJU16; with the RH70 MASSBUS interface of the PDP-11/70, it is denominated as a TWU16.
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
To be added.
