Low End System Interconnect
From Computer History Wiki
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
