71–80 of 105 posts
Do we know what instruction-set profile it implements? Any?
As RVA22 is not done (although almost there), we can't know whether it's compliant, but we will once it is. Expectation is yes.
Otherwise, most stuff out there will be RVA20 compliant once that's ratified, as that reflects what was already common back in chips designed in 2020, what most have been calling RV64GC.
How well are Linux and the BSDs supported?
Freebsd boots, but that's it.
Of course, as this board is the first large production run, decent spec'd and reasonably compliant This is an order of magnitude more boards than accumulated RISC-V development boards distributed to date.
Imagination Technologies GPU = no thanks If your only sell is open hardware, I'm going to wait until the hardware is open to waste my time with it.
Upstreasming status: https://rvspace.org/en/new-page/JH7110_Upstream_Plan StarFive Tech. have been upstreaming on kernel, OpenSBI and U-Boot from several weeks now. Of course this is still weeks/months away (if not more, for all the features) from landing in stable releases. Even more for distributions to pick those up.
New: https://rvspace.org/en/project/JH7110_Upstream_Plan
I have a sifive "unmatched" board sitting here collecting dust, cost me $700 then. Most projects turned out ARM based after I bought it. The site is not working, any price of this board? What's its market, e.g. ip camera? I'm still interested in lower cost ready to go risc-v boards.
$55/$65/$85 for 2GB, 4GB, 8GB plus shipping
Do we know what instruction-set profile it implements? Any?
I understand it's RV64GCB + a few Z extensions. As RVA22 is not done (although almost there), we can't know whether it's compliant, but we will once it is. Expectation is yes. Otherwise, most stuff out there will be RVA20 compliant once that's ratified, as that reflects what was already common back in chips designed in 2020, what most have been calling RV64GC.
Earlier quoted context omitted.
I understand it's RV64GCB + a few Z extensions. As RVA22 is not done (although almost there), we can't know whether it's compliant, but we will once it is. Expectation is yes. Otherwise, most stuff out there will be RVA20 compliant once that's ratified, as that reflects what was already common back in chips designed in 2020, what most have been calling RV64GC.
Thank you. Guessing the Z extensions are AES operations? Supervisor ops?
These are documented.
But that design is configurable. We know B extension (optional) is enabled. I have no idea about every other setting this core can be synthesized with.
I received mine weeks ago. There are several desktop images but various issues reported from no display output, to only 1080p supported. To this image or that one working. Important note, the later images require an updated to uboot and SPL, either with the bootrom or a serial connection. It's a mess at the moment!
> It's a mess at the moment! yea, thats for sure, but i think a lot of promise too... from my cursory testing it seems gui performance is much better than hifive unmatched (window manager, apps, web browser) [edit] add geekbench https://browser.geekbench.com/v5/cpu/compare/17159543?baseli...
Any performance comparisons with Raspberry Pi boards? How does this RISC-V CPU stack up against them?
Not great; VisionFive appears to be significantly less performant. https://browser.geekbench.com/v5/cpu/compare/17159543?baseli...
Of course, there's a lot of software factors holding it back, such as quality or lack of drivers.
Benchmarks will be worth re-running in a few months, once some level of ecosystem is in place.
Earlier quoted context omitted.
I understand it's RV64GCB + a few Z extensions. As RVA22 is not done (although almost there), we can't know whether it's compliant, but we will once it is. Expectation is yes. Otherwise, most stuff out there will be RVA20 compliant once that's ratified, as that reflects what was already common back in chips designed in 2020, what most have been calling RV64GC.
Thank you. Guessing the Z extensions are AES operations? Supervisor ops?