View source for KLESI Low-End Storage Interconnect

The '''KLESI Low-End Storage Interconnect''' controllers are a series of [[device controller]]s which use [[Mass Storage Control Protocol|MSCP]] and TMSCP [[protocol]]s, running over a [[Low End System Interconnect]] physical interconnect, to interface with [[disk]]s and [[magnetic tape drive]]s.

They include the '''KLESI-UA''' ('''M8739''') for the [[UNIBUS]], the '''KLESI-QA''' ('''M7740''') for the [[QBUS]] and the '''KLESI-B''' ('''T1014''') for the [[VAXBI]] bus. The -UA is a [[DEC card form factor|quad]] card which plugs into an [[Small Peripheral Controller|SPC]] slot. The -QA is a dual (although the -S variant is packaged in a quad form, with an [[S-box]] handle, for the [[BA200 series enclosure]]s). The KLESI-B is contained on a standard BI module.

One main use was with the TU81E/TU81-Plus variant of the [[TU81 Streaming Tape Unit‎]]; it was also used with the [[RC25 disk drive]]. 

<!-- They have an identical programming interface; both use [[Direct Memory Access|DMA]] to transfer information between [[main memory]] and the device.

==Device registers==  -->
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==Further reading==

* ''KLESI-B Module User and Installation Guide'' (EK-LESIB-UG)
* ''KLESI-B Adapter Technical Manual'' (EK-LESIB-TM)

==External links==

* [http://www.vaxhaven.com/images/0/08/EK-KLESI-IN-001.pdf KLESI-SF Q22-bus Adapter Option Installation Guide] (EK-KLESI-IN-001)
* [http://www.bitsavers.org/pdf/dec/qbus/MP01876_KLESI_EngrDrws_Aug84.pdf KLESI Field Maintenance Print Set] (MP-01876-0-0 - covers the KLESI-UA and KLESI-QA)

[[Category: UNIBUS Storage Controllers]]
[[Category: QBUS Storage Controllers]]
[[Category: VAXBI Storage Controllers]]
[[Category: LESI]]