By the way, I meant kendryte k210. and the board, for example, maix bit, is
very cheap (you can get a stock from Bangood.com)

сб, 17 авг. 2019 г., 1:56 minux <minux.ma@gmail.com>:

> On Fri, Aug 16, 2019 at 9:56 AM Richard Miller <9fans@hamnavoe.com> wrote:
> > > Do you mean something like BlackIce II (I'm under RV32I)?
> >
> > Yes, I have tried various soft cores on BlackIce (including
> > one of my own design, for fun); also real silicon HiFive-1.
> > So far none of these has had an MMU, which is required for
> > Plan 9 (though not for Inferno).
>
> Speaking of RISC-V with MMU for Plan 9, Kendryte K210 is a 28nm MCU
> with dual core RV64GC and Linux capable MMU (!). It has 8MB onchip
> SRAM and also NN, FFT accelerators.
> I think that makes a good platform for Plan 9 on RISC-V, on a real silicon.
> It also has a lot of really cheap evaluation board options available.
> (The only other currently available RV64GC w/ MMU silicon is the
> Hifive unleashed, which is very expensive.)
>
> The only major problem of K210 is that its IO capabilities are fairly
> limited and you need external Ethernet/Wifi solutions on SPI bus,
> which is likely slow.
>
>