HP9845B - Main Board (09845-66500)
I have created full Documentation of the HP9845B Main Board (Rev.A). The original mainboard is a multilayer PCB, sized 345 x 420 mm.
Fig. 1 - original board 09845-66500 Rev. A
This photo shows boards topology of the HP 9845B boards on the mainboard:
Fig. 2 - HP9845B Main Board topology
The next image (created with CAE EdwinXP) shows connections between the connectors on the HP9845B motherboard. I have created a complete detailed circuit diagram for this motherboard.
The schematic and knowledge of the connection are required for the future design of new CPU boards or any ad-on-board for HP9845B.
Fig. 3 - HP9845B Main Board - connection between the connectors
