J-core J2 is an open source processor and SoC design implemented in VHDL, and using SH2 instruction set found in some Renesas (previously Hitachi) micro-controllers. The code available royalty free under a BSD license, and it’s also patent-free since all SH2 related patents expired expired in October 2014. The developers used to run the code on Xilinx Spartan 6 based Numato Mimas v2 board since it was cheap ($50) and mostly did the job. “Mostly”, because it still lacked Ethernet, capability for SMP and the serial port was slow, so they decided to design their own Turtle Board to address those issues. Turtle Board preliminary specifications: FPGA – Xilinx Spartan 6 LS25 or LS45 FPGA MCU – 8-bit Atmel MCU for load/update flash at power on. Storage – micro SD slot, 8MB SPI flash System memory – 256 MB RAM Video & Audio Output – HDMI and AV jack Connectivity […]
Turtle Board is a Raspberry Pi 2 Like FPGA Board for J-Core J2 Open Source SuperH SH2 SoC
