View source for TQK50 Tape Drive Controller

[[Image: M7546.jpg|thumb|250px|right|M7546 TQK50 card]]

The '''TQK50 Tape Drive Controller''' is a [[QBUS]] [[device controller]] for the [[TK50 Tape Drive|TK50]] [[magnetic tape drive]]. It uses [[Mass Storage Control Protocol|TMSCP]].

It is a [[DEC card form factor|dual]] [[printed circuit board|board]], the '''M7546'''; data is transferred to the host using [[Direct Memory Access|DMA]].

It contains an [[Intel 80186]] [[microprocessor]], along with on-board [[static RAM]] and [[PROM]] [[integrated circuit|chips]]; a 7201 Multi-Protocol Serial Controller is used to communicate with the drive.

Two [[Light Emitting Diode|LEDs]] on the top edge of the card, controlled by the 80186, indicate the status of the TQK50, including the outcome of [[diagnostic]]s.

==Further reading==

* ''TQK50 Field Maintenance Print Set (MP-2055) - not online

==External links==

* [http://www.bitsavers.org/pdf/dec/magtape/tk50/EK-0TK50-TM-002_Jul86.pdf TK50 Tape Drive Subsystem Technical Manual] (EK-0TK50-TM-002) - the TQK50 is covered in Chapter 5

[[Category: QBUS Storage Controllers]]