Editing PDP-10 (section)

===Magnetic tape drives===
Two models of [[tape drive]]s were supported by the TM10 Magnetic Tape Control subsystem:
* TU20 Magnetic Tape Transport – 45 ips (inches/second)
* TU30 Magnetic Tape Transport – 75 ips (inches/second)
* TU45 Magnetic Tape Transport – 75 ips (inches/second)
A mix of up to eight of these could be supported, using [[7-track tape|seven-track]] or [[9-track tape|nine-track]] devices. The TU20 and TU30 each came in A (9-track) and B (7-track) versions, and all of the aforementioned tape drives could read/write from/to 200 [[Bits Per Inch|BPI]], 556 BPI and 800 BPI IBM-compatible tapes.

The TM10 Magtape controller was available in two submodels:
* TM10A did cycle-stealing to/from PDP-10 memory using the KA10 Arithmetic Processor
* TM10B accessed PDP-10 memory using a DF10 Data Channel, without "cycle stealing" from the KA10 Arithmetic Processor<ref name=HW10.KA10>{{cite book
|url=http://bitsavers.trailing-edge.com/pdf/dec/pdp10/KA10/DEC_10-HAAB-D_SitePrep_May70.pdf
|title=PDP-10 Site Preparation Guide 
|publisher=Digital Equipment Corporation |date=May 1970}}</ref>{{rp|49}}