The DS3800HMPF1E1F is part of General Electric’s Mark IV Speedtronic system. The Mark IV was one of the later of the Speedtronic turbine control systems released by General Electric and the first to offer triple modular redundant distributed control. This control architecture relies on three identical controller boards, of which the DS3800HMPF1E1F is one version, that vote on all data before it is used for control or display purposes.
The DS3800HMPF1E1F was one of the first available controllers for the Mark IV. It is built upon an Intel 8086 microprocessor chip. This chip was a distinct improvement over earlier microprocessors and includes the capability for floating-point performance. This chip varied (depending on when it was produced) from 5 MHz to 10 MHz clock frequency. The chip also offers transfers of data in 16- or 8-bit cycles.
The DS3800HMPF1E1F is built to accept an optional auxiliary board. This communicates with the primary board using a ribbon cable plugged into a vertical pin connector located in the center of the board. Other connectors include a right-angled connector on the leading board edge and a backplane located on its rear edge. The leading edge is also fitted with extractor clips, jumper switches, and several LED indicators. Configurable hardware settings should be noted and duplicated from your old board to your replacement board during the installation of your new component.
Additional details about the Mark IV system or this board, in particular, can be found using user guides or manuals originally provided to users by General Electric. AX Control may be able to help with the replacements of these documents if you no longer have access to your originals.