HNHacker News
TopNewBestAskShowJobs

Cyao

101 karma · joined May 28, 2025

submissionscomments
Cyao··on Show HN: I built an open-source Linux-capable single-board computer with DDR3
Thanks! I used the orange pi pc fel tester [1] and gradually lowered the clock speed until it became stable. When I got to 696 MHz the test ran for more than 3 hours without problems.

The H3 CPU has a small bootloader inside, that enumerated the SD card and eMMC to look for a user-made bootloader. IIRC it looks for some file inside of the file system, and loads it to 0x70000. Thus you can customize it if you have enough time :)

[1] https://github.com/ssvb/lima-memtester/releases/tag/20151207...

Cyao··on Show HN: I built an open-source Linux-capable single-board computer with DDR3
Hey! Not everything needs to have a point. (Or else why would there be 20 AI models competing) I did this mostly for the fun and challenges, because why not! :-P
Cyao··on GitHub is returning Gateway Time-outs
Working for me :P
Cyao··on I wasted years of my life in crypto
But you (theoretically) cannot know who mined the coin, or who is actually the holder of the coin, thus the anonymity. Though currently this is getting restricted as governments require more ID verification from businesses dealing with crypto, which links up your coin to a real person.
Cyao··on Framework Sponsors CachyOS
Sometimes Discord is still pretty helpful with real-time support. It indeed has its flaws, but some of the best real time help is still given there. I love the C++ discord, it's just filled with gems.
Cyao··on Framework Sponsors CachyOS
Hope this doesn't end up political... Last time the entire Framework Discord's mod team went on strike because of a controversial sponsorship, and ended with the closure of the discord.
Cyao··on Show HN: HCB Mobile – financial app built by 17 y/o, processing $6M/month
Totally agree. Even if I'm a teen myself I never post my age unless someone asks explicitly. Saying your age is just trying to find excuses to justify a sub-par software imo (Not saying this project is sub-par)
Cyao··on Icepi Zero – The FPGA Raspberry Pi Zero Equivalent Is Now on Crowd Supply
After getting quite a lot of emails asking to buy one last time - I've put my Icepi onto Crowd Supply!

This is a dev board that carries an ECP5 FPGA, and has a raspberry pi zero footprint. It also has a few improvements! Notably the 2 USB-B ports are replaced with 3 USB-C ports, and it has additional indicator LED and buttons.

This board can output HDMI, read from a uSD, use a SDRAM and much more. I'm very proud the product of multiple months of work.

It is also completely open source! Check out the source on github: https://github.com/cheyao/icepi-zero

Cyao··on Show HN: Icepi Zero – The FPGA Raspberry Pi Zero Equivalent
Oh that's nice, how come I never saw those!
Cyao··on Show HN: Icepi Zero – The FPGA Raspberry Pi Zero Equivalent
Can I ask your reasoning about not selling them too cheaply? I would like to sell them cheaper then the existing boards since the price prevented me from buying one when I was 13
Cyao··on Show HN: Icepi Zero – The FPGA Raspberry Pi Zero Equivalent
it can! no reason why it wouldnt be
Cyao··on Show HN: Icepi Zero – The FPGA Raspberry Pi Zero Equivalent
at bulk 40-50$! My dev batch of 5 comes out at around 70$ per board, but it has a large startup cost.
Cyao··on Show HN: Icepi Zero – The FPGA Raspberry Pi Zero Equivalent
it probably can - I see that uls3x already has a few ported over cores, and they will be able to run on this fpga with little modifs
Cyao··on Show HN: Icepi Zero – The FPGA Raspberry Pi Zero Equivalent
I am indeed using fully open source tooling! Check out the makefiles in the firmware directory :)
Cyao··on Show HN: Icepi Zero – The FPGA Raspberry Pi Zero Equivalent
After the amount of emails i got asking if i sell the boards, I just applied to crowdsupply :P