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Microwatt Alternatives
Similar projects and alternatives to microwatt
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simdjson
Parsing gigabytes of JSON per second : used by Facebook/Meta Velox, the Node.js runtime, ClickHouse, WatermelonDB, Apache Doris, Milvus, StarRocks
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lxp32-cpu
A lightweight, open source and FPGA-friendly 32-bit CPU core based on an original instruction set
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a2i
The A2I core was used as the general purpose processor for BlueGene/Q, the successor to BlueGene/L and BlueGene/P supercomputers (by OpenPOWERFoundation)
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a2o
The A2O core was a follow-on to A2I, written in Verilog, and supported a lower thread count than A2I, but higher performance per thread, using out-of-order execution (register renaming, reservation stations, completion buffer) and a store queue. It is now being updated for compliancy and integration into open projects. (by OpenPOWERFoundation)
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a better microwatt alternative or higher similarity.
microwatt discussion
microwatt reviews and mentions
Posts with mentions or reviews of microwatt.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2023-10-21.
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Microwatt: A tiny Open POWER ISA softcore written in VHDL 2008
My favorite part of this project is the pretty large battery of test cases. A lot of chip rtl releases don't bother with open sourcing the verification too, and that's arguably more useful than the rtl in the first place.
https://github.com/antonblanchard/microwatt/tree/master/test...
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Arm wants to charge dramatically more for chip licenses
MicroWatt is the only one I know of.
https://github.com/antonblanchard/microwatt
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RISC-V Pushes into the Mainstream
I have several OpenPOWER systems, including the POWER9 I use as my usual desktop. Besides IBM and other server manufacturers like Tyan and Wistron, you can get them as Raptor workstations and servers.
If you want an OpenPOWER design to play with, look at Microwatt ( https://github.com/antonblanchard/microwatt ) which is complete enough to boot Linux.
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How long until RISC gets adopted for the desktop?
Not true, as of 2019 the power ISA is able to be used without needing to pay any royalties to ibm under the openpower foundation. There's already a few projects that have taken advantage of it such as libreSOC and Microwatt. Source code for various firmware components are also freely available pertaining to the power platform.
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Build Open Silicon with Google
https://github.com/antonblanchard/microwatt is an example of a Linux-capable 64-bit core that has been submitted on multiple Open MPW shuttles:
- Any raw binary generic platform-agnostic test roms for PowerPC?
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What would you think if the Amiga line jumped from PowerPc to RISC-V CPUs?
GitHub https://github.com/openpower-cores https://github.com/antonblanchard/microwatt
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Keeping POWER relevant in the open source world
At the other end of the scale, if anyone wants to play you can run a little openpower CPU on a FPGA with completely open source. https://github.com/antonblanchard/microwatt
It's capable of running Linux, some example docs are https://shenki.github.io/boot-linux-on-microwatt/
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What is your take on ISA architectures for FPGAs (x86, arm, risc-v)?
Why dismiss POWER or SPARC ? :-)
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A note from our sponsor - SaaSHub
www.saashub.com | 14 Jun 2026
Stats
Basic microwatt repo stats
19
720
8.5
11 days ago
antonblanchard/microwatt is an open source project licensed under GNU General Public License v3.0 or later which is an OSI approved license.
The primary programming language of microwatt is Verilog.
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