RH780 Massbus Adapter
From Computer History Wiki
The RH780 Massbus Adapter was a MASSBUS device controller for the VAX-11/780's Synchronous Backplane Interconnect.
It was implemented on four hex cards:
- M8275 - SBI/MBA interface
- M8276 - internal registers
- M8277 - MASSBUS data paths
- M8278 - MASSBUS control paths
They mount in a custom 6-slot backplane; 1 slot is unused, and 1 slot (on the back of the backplane) is used to hold a hex M9041 paddle card, which carries the MASSBUS out on three BC06R flat cables to what appears to be a standard MASSBUS connector, in an 'expansion I/O connector' on the side of the cabinet.
External links
- RH780 Massbus Adapter Technical Description (EK-RH780-TD-001)
- RH780 Field Maintenance Print Set (MP-00499)
