Difference between revisions of "MLSI-BA11-200"
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| − | The [[MDB Systems]] | + | The '''MLSI-BA11-200''' from [[MDB Systems]] is a third-party [[QBUS]] [[mounting box|chassis]] (including [[backplane]] and [[power supply]]) offering that is fully compatible with [[Digital Equipment Corporation|DEC]] QBUS [[DEC card form factor|dual]]-height cards, and some quad-height cards. It includes an eight-slot quad height [[QBUS#Backplanes|Q/Q]] backplane. Original backplanes appear to be [[QBUS#Variable address size|Q18]] only, but can be [[wire-wrap]]ped to Q22. |
| − | A small [[PDP-11/03]] style front panel is provided, with typical RUN/HALT, RESET, and LTC switches. There are indicators for DC OK and RUN. The RUN lamp is actually an illuminated | + | A small [[PDP-11/03]] style [[front panel]] is provided, with typical RUN/HALT, RESET, and [[Line time clock|LTC]] switches. There are indicators for [[direct current|DC]] OK and RUN. The RUN lamp is actually an illuminated push-button switch, and doubles as the RESET switch. |
| − | The bare MLSI-BA11-200 configuration does not contain a LTC, bus termination, | + | The bare MLSI-BA11-200 configuration does not contain a LTC, [[bus]] [[terminator|termination]], power-fail detect/sequencing, or even an interface to the front panel lamps and switches. These functions are provided by the [[MLSI-SMU]], which is a dual-height QBUS card. The MLSI-SMU also provides a pseudo-[[switch register]]. |
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| + | ==See also== | ||
| + | |||
| + | * [[Upgrading QBUS backplanes]] | ||
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| + | [[Category: QBUS Hardware]] | ||
Latest revision as of 17:18, 26 July 2024
The MLSI-BA11-200 from MDB Systems is a third-party QBUS chassis (including backplane and power supply) offering that is fully compatible with DEC QBUS dual-height cards, and some quad-height cards. It includes an eight-slot quad height Q/Q backplane. Original backplanes appear to be Q18 only, but can be wire-wrapped to Q22.
A small PDP-11/03 style front panel is provided, with typical RUN/HALT, RESET, and LTC switches. There are indicators for DC OK and RUN. The RUN lamp is actually an illuminated push-button switch, and doubles as the RESET switch.
The bare MLSI-BA11-200 configuration does not contain a LTC, bus termination, power-fail detect/sequencing, or even an interface to the front panel lamps and switches. These functions are provided by the MLSI-SMU, which is a dual-height QBUS card. The MLSI-SMU also provides a pseudo-switch register.
