View source for TUK50 Host Adapter Module

[[Image:tuk50.jpg|thumb|200px|right|thumb|TUK50-AA board]]
 
The '''TUK50 Host Adapter Module''' is a [[UNIBUS]] [[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|quad]] [[printed circuit board|board]], the '''M7547''', and plugs into an [[Small Peripheral Controller|SPC]] slot. Data is transferred to the host using [[Direct Memory Access|DMA]]; installation of a TUK50 thus requires removal of the [[Non-Processor Request and Grant|NPG]] [[jumper]] from the selected slot.

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.

==Installation==

[[Image:TUK50 M547 UNIBUS Controller Module and Cable.png|thumb|300px|left|thumb|TUK50 cabling]]

The TK50 responds to two [[address]]es on the UNIBUS; the initialize poll (IP) [[register]] and the status address (SA) register. The installer may change these addresses by changing the address jumpers on the board. The first TK50's UNIBUS base address is normally 0774500; additional unit are assigned [[floating device address space|floating addresses]].  

The controller module has the following jumpers and switches:

[[Image:TUK50_M7547_Jumpers.png|thumb|250px|right|thumb|TUK50 Jumpers]]

* Jumper W51, W61, W401 - Manufacturing use only
* Jumpers W1 through W12 - Address
* Jumper W201 - Non-existent memory timeout extension - With the jumper removed, the non-existent memory timeout is extended from 28 nanoseconds to 37 microseconds; the manufacturing configuration is 'installed'
* Hardware revision - An 8-wide [[DIP switch]] used to set the hardware revision level of the module; 'open' on a switch reads as '0'
* Unit number - An 8-wide DIP switch used to set the TMSCP unit number; the sense is as the above

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==Further reading==

* ''TUK50 Field Maintenance Print Set (MP-2059) - not online

==External links==

* [https://www.vaxarchive.org/manuals/tuk50ref.zip TK50 Unibus Subsystem Owner's Manual] (EK-TUK50-OM-001) - ZIP archive of TIF page images
* [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 TUK50 is covered in Chapter 6

[[Category: UNIBUS Storage Controllers]]