Difference between revisions of "Low End System Interconnect"
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| − | The | + | The '''Low End System Interconnect''' (often given in [[Digital Equipment Corporation|DEC]] documentation as '''lowend system interconnect''', or some other variant, but the acronym, '''LESI''', is usual) is a DEC-standard [[bus]] used to connect [[mass storage]] devices to a [[device controller]]. |
The LESI is a set of [[input/output|I/O]] [[conductor]]s, instantiated as a 50-conductor [[flat cable]] (for long runs, this may be implemented as a shielded, round cable). Communication across it uses the [[Mass Storage Control Protocol]]. | The LESI is a set of [[input/output|I/O]] [[conductor]]s, instantiated as a 50-conductor [[flat cable]] (for long runs, this may be implemented as a shielded, round cable). Communication across it uses the [[Mass Storage Control Protocol]]. | ||
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[[Category: DEC Buses]] | [[Category: DEC Buses]] | ||
[[Category: DEC Mass Storage]] | [[Category: DEC Mass Storage]] | ||
| + | [[Category: DEC Interface Standards]] | ||
| + | [[Category: LESI]] | ||
Latest revision as of 19:54, 23 April 2024
The Low End System Interconnect (often given in DEC documentation as lowend system interconnect, or some other variant, but the acronym, LESI, is usual) is a DEC-standard bus used to connect mass storage devices to a device controller.
The LESI is a set of I/O conductors, instantiated as a 50-conductor flat cable (for long runs, this may be implemented as a shielded, round cable). Communication across it uses the Mass Storage Control Protocol.
Host interfacing is provided by the KLESI Low-End Storage Interconnect device controllers; controllers are available for the UNIBUS, the QBUS and the VAXBI bus.
Devices that use it include the RC25 disk drive and TU81 magtape drive.
External links
- EK-TUA81-TM_002 TU81/TA81 Technical Manual - the LESI is briefly described in Appendix A
