What is it?

This is for a bare mainboard PCB Only. Components and FPGA boards are for information only, not supplied The Multicomp Cyclone II-C (v1.10) is a motherboard which provides peripheral connectivity for a Cyclone II FPGA development board commonly available on eBay. The board was designed “by committee” in the retrobrewcomputers forum during December 2015, with James Moxham doing all the actual work (schematic capture and PCB layout). One of the prime motivators for this board was to fit a 10cmx10cm footprint because the manufacturing cost of PCBs of this size is particularly attractive. It provides connectivity for the following peripherals:

VGA Screen with PS/2 Keyboard interface Two RS-232 serial ports: Serial A uses on-board level-shifter and DE-9F connector or external level shifter via 6-pin connector Serial B uses external level shifter via 6-pin connector SD Card connector Two RAM sockets to support up to 1 MB of RAM. 5-pin connector for external DS1302 real-time clock and backup coin cell 3V3 or 5V power option for PS/2 Keyboard, with voltage clamp diodes. 3 LEDs RCA Video connector Jumpers for reset and for boot control Debug/Expansion headers for data bus and uncommitted FPGA pins Due to the header installation on the Cyclone II module, the module is required to be mounted inverted onto the motherboard.

Why did you make it?

I wanted to build this project and use an FPGA to simplify all the logic. I had some spare PCBs

What makes it special?

It is a great project based on incredibly brilliant work from Grant Searle who implemented the idea of a complete SBC on a Cyclone II FPGA with his MultiComp