Difference between revisions of "MLSI-BA11-200"
(Adding initial article on MDB MLSI-BA11-200 chassis) |
(No difference)
|
Revision as of 19:46, 24 July 2024
The MDB Systems MLSI-BA11-200 is a third party QBus chassis, 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 pushbutton switch, and doubles as the RESET switch.
The bare MLSI-BA11-200 configuration does not contain a LTC, bus termination, powerfail 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.
