cpu11
serv
Our great sponsors
| cpu11 | serv | |
|---|---|---|
| 2 | 19 | |
| 146 | 1,244 | |
| - | - | |
| 5.3 | 7.7 | |
| 5 months ago | 17 days ago | |
| Verilog | Verilog | |
| GNU General Public License v3.0 or later | ISC License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
cpu11
- Dec F11 precise replica in Verilog, based on reverse engineering of real dies
-
I finally got a PDP-8i (sort of).
There are quite a few HDL implementations, eg CPU11 and this list.
serv
- SERV – The SErial RISC-V CPU
- SERV: A bit-serial RISC-V core
- SERV – open-source Tiny SErial RISC-V CPU
- How many LUT for an 8 bit CPU?
-
Minimax: a Compressed-First, Microcoded RISC-V CPU
In short: it works, though the implementation lacks the crystal clarity of FemtoRV32 and PicoRV32. The core is larger than SERV but has higher IPC and (very arguably) a more conventional implementation. The compressed instruction set is easier to expand into regular RV32I instructions than it is to execute directly.
-
Apple to Move a Part of Its Embedded Cores to RISC-V
https://github.com/olofk/serv
-
I have created a Reddit community about PicoBlaze soft processor...
As for the size advantage: this mattered more when LUTs were precious and when PicoBlaze's competition was either similarly unorthodox (J1 Forth CPU) or several times larger (MicroBlaze). Nowadays, there are very small RISC-V cores like FemtoRV32 Quark or SERV. RISC-V benefits from mainstream open-source tooling and has momentum that's hard to beat.
- Microchip to develop 12-core RISC-V processor for NASA
-
RISC-V announces first new specifications of 2022 adding to 16 ratified in 2021
The RISC-V spec does allow non-trapping behavior and SeRV in particular has non-trapping behavior, which is an important part of how it can fit into 200 4-input LUTs.
https://github.com/olofk/serv#good-to-know
-
Efinix and Xyloni Board - Heard a lot of clients mention them, so took a look.
It will be interesting to see if a Serv will fit with some usable gates left over.
What are some alternatives?
open-fpga-verilog-tutorial - Learn how to design digital systems and synthesize them into an FPGA using only opensource tools
neorv32 - :rocket: A tiny, customizable and extensible MCU-class 32-bit RISC-V soft-core CPU and microcontroller-like SoC written in platform-independent VHDL.
PDP-11 - A collection of PDP-11 related files
riscv-cores-list - RISC-V Cores, SoC platforms and SoCs
hdl - HDL libraries and projects
IronOS - Open Source Soldering Iron firmware
livehd - Live Hardware Development (LiveHD), a productive infrastructure for Synthesis and Simulation
fusesoc - Package manager and build abstraction tool for FPGA/ASIC development
riscv - RISC-V CPU Core (RV32IM)
neo430 - :computer: A damn small msp430-compatible customizable soft-core microcontroller-like processor system written in platform-independent VHDL.
openlane - OpenLane is an automated RTL to GDSII flow based on several components including OpenROAD, Yosys, Magic, Netgen and custom methodology scripts for design exploration and optimization.
psram-tang-nano-9k - An open source PSRAM/HyperRAM controller for Sipeed Tang Nano 9K / Gowin GW1NR-LV9QN88PC6/15 FPGA