In response to Joshu - I don't think this is a Kickstarter Campaign - I get it's two guys in the UK doing this off their own backs - and in record time - design on laptop to working board prototype in less than 2 weeks - with the pcbs made in Shenzhen China, in under a week. There on Twitter under #myStorm - if you want to check them out

> - and in record time - design on laptop to working board prototype in less than 2 weeks

Well, it looks like there are 3 chips, a usual DC-DC converter, and that's all :-)

If you search around the communities - there's an STM32duino forum where the EagleCAD design files for #myStorm have been placed http://www.stm32duino.com/viewtopic.php?f=19&t=1276#p16407

It looks like they have 512K bytes of 10nS SRAM on the back of the board - but it's neat how the $5 Rapberry Pi-Zero plugs in at one end - some cool overall pics on Twitter if you search #myStorm

Suggesting someone search Twitter for a hashtag is not really good documentation. Maybe a link to a top level project page somewhere would be helpful.

I have been wanting to build a smaller project around an fpga so I am very excited about this, if they plan to sell it.

Unfortunately IceStorm has only reverse engineered the 1K and 8K, not the 4K.

There is no 4K die. The 4K chips are using 8K dies, the lattice software limits the number of usable LUTs to 4K. IceStorm will give you access to all 8K LUTs in the device.

I didn't realize that. Thanks for clarifying, Clifford!

Really? On the http://www.clifford.at/icestorm/ IceStorm site - If you look carefully at the table of supported devices - the ICE40HX4K-144 is there - 2 rows from the bottom

Am I right in thinking 8K refers to the number of LUTs/cells? If so I won't be fitting the Rocket RISC-V design in one any time soon. Although it's a good start - I'll be very happy to see the back of Xilinx Vivado awfulness one day.

PicoRV32 (https://github.com/cliffordwolf/picorv32) and ORCA (https://github.com/VectorBlox/orca) are two RISC-V implementations that nicely fit in ~2000 iCE40 LUTs. UCB-BAR V-Scale (https://github.com/ucb-bar/vscale) fits in ~4000 iCE40 LUTs.

There is a Pico Risc-V that fits in ~2000 LUTs that can be built for the ice40: https://github.com/cliffordwolf/picorv32 https://github.com/cliffordwolf/picorv32/blob/master/scripts...

I stand corrected. See Clifford's other comment in this thread.