bunnie

@[email protected]
3.7K Followers
50 Following
67 Posts
Good at following directions. Bad at obeying rules.
Githubhttps://github.com/bunnie
Twitter@bunniestudios
Bloghttps://bunniestudios.com
Bluesky@bunnie.org
Abouthttps://bunnie.org
Show threadbunnie3d ago
@th i'm not 100% sure what topology you're thinking of, but the mental model I'd use is the number of riscv cpu cycles you need to read the bit, do some shifting/masking as necessary, then write it out, keeping in mind that the picorv32 takes multiple cycles per instruction.
bunnieMar 10
I built a microcontroller for high-assurance applications on TSMC 22nm. I call it the "Baochip-1x". Read more about what it is and how it came about at this blog post: https://www.bunniestudios.com/blog/2026/baochip-1x-a-mostly-open-22nm-soc-for-high-assurance-applications/
Show threadbunnieMar 7
@lutindiscret @baochip.com great, probably just user error on my side.
Show threadbunnieMar 7
@lutindiscret @baochip.com weird, doesn't look like stuff is automatically cross posting...
Show threadbunnieMar 7
@lutindiscret I guess in theory this should be live in about 5 minutes: @baochip.com
Show threadbunnieMar 5
@lutindiscret can you teach me how to bridge accounts? ie link me to a guide or explain how to do it to me.
Show threadbunnieMar 4
@gkrnours The baochip is fairly limited in I/O, so any application like this would require some helper to expand the I/O, creating a bottleneck and thus making performance less than desired. So I would guess it is not strictly impossible, but it's probably also not going to work as well as desired.
bunnieMar 3
Tom MarbleMar 2

Dabao has launched!!!

Open hardware, firmware, software from @bunnie !

https://www.crowdsupply.com/baochip/dabao/updates/our-campaign-has-launched

Our Campaign Has Launched!

Today marks the start of the Dabao campaign. If you're interested in open source hardware, security, or trust, I'm offering you a chance to order some of the first evaluation boards for a mostly-open, security-oriented microcontroller. Dabao is an evaluation board for the Baochip-1x SoC, a microcontroller that raises the bar on inspectable hardware, bringing you a system-on-chip (SoC) that you can check from the silicon all the way to the software.

Crowd Supply
Show threadbunnieDec 31

@Logical_Error "use case" - I think of it as a general purpose MCU with some bonus security features. I personally am developing systems around it targeted at authentication tokens, but I don't mean that to be a box into which it is defined. The emphasis on open source means that everyone is invited to use it however they see fit.

The intention is not for Xous to be a desktop replacement - the transition comparison is more like going from say, Zephyr or ThreadX to Xous. It's an embededd OS so the harder challenge is porting code from one ecosystem to another. Because we are Rust, we already don't have source-language compatibility that C-based OSes would have. So maybe the biggest ecosystem you could copy paste code out of is Tock, another Rust-based OS.

Show threadbunnieDec 31
@pjacock Also for software support, we're focusing on pure Rust and we have a custom OS we wrote for it called Xous - https://betrusted.io/xous-book/
Introduction - The Xous Operating System