Description
Riegel is an FPGA-based computer designed for timeless applications.
Specifications
- Lattice ICE40HX4K FPGA
- 7680 LUTs when using open-source tools
- 2 PLLs
- 64MB OSPI PSRAM
- 512KB Static RAM (10ns)
- 1MB (8Mbit) NOR Flash (via user-replaceable/upgradeable MMOD module)
- 2 Digilent Pmod™ compatible expansion ports
- 1 MMOD socket
- MicroSD card slot
- USB-C for power and configuration
- PS/2 port for keyboard
- VGA port can support at least 640×480 with 8 colors
- 90mm x 40mm board dimensions (V3B)
Optional Accessories
Resources
- Example gateware, schematics, documentation and a 3D-printable case are available on GitHub
- RISC-V SOC “Zucker” designed specifically for Riegel is available on Github
- There is fork of the iceZ0mb1e Z80 SOC with support for Riegel
- Component Datasheets (PDF)
