Apple to Move a Part of Its Embedded Cores to RISC-V

1. phison

   1 1 1 10.0 C

   Phison PS2303 (PS2251-03) framework

   

   Here's one with a 250MHz 8051: https://github.com/flowswitch/phison/wiki/PS2303

   They don't need anything as powerful as ARM (and thus avoid the licensing fees), and it's a very price-sensitive market, so a fast 8051 + accelerator hardware is enough.

   No doubt some of the more expensive ones may be ARM-based, but I think the 8051-based ones far outsell them in volume.

2. InfluxDB

   www.influxdata.com featured

   InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.

   

3. picorv32

   2 17 3,481 5.4 Verilog

   PicoRV32 - A Size-Optimized RISC-V CPU

   

   That is, reducing the number of LUT required to implement a CPU of a given ISA.

   A basic RV32 CPU is down to 500-700 LUT.

       https://github.com/YosysHQ/picorv32

4. serv

   3 22 1,581 7.7 Verilog

   SERV - The SErial RISC-V CPU

   

   https://github.com/olofk/serv

5. Projects

   4 7 433 7.7 C++

   Ted Fried's MicroCore Labs Projects which include microsequencer-based FPGA cores and emulators for the 8088, 8086, 8051, 6502, 68000, Z80, Risc-V, and also Typewriter and EPROM Emulator projects. MCL51, MCL64, MCL65, MCL65+, MCL68, MCL86, MCL86+, MCL86jr, MCLR5, MCLZ8, MCL6809, XTMax (by MicroCoreLabs)

   

   There is a difference, but not much!

       https://github.com/MicroCoreLabs/Projects/tree/master/MCL51

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