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From: antispam@fricas.org (Waldek Hebisch)
Newsgroups: comp.lang.forth
Subject: Re: 1 euro Olimex RISC-V mini-PC: this needs Forth ;)
Date: Fri, 18 Oct 2024 14:14:50 -0000 (UTC)
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albert@spenarnc.xs4all.nl wrote:
> In article <vesgmb$1i2rq$1@paganini.bofh.team>,
> Waldek Hebisch <antispam@fricas.org> wrote:
>>LIT <zbigniew2011@gmail.com> wrote:
>>>> I ordered 3 kinds: 64Mb, 256Mb and Milkv-Duo-S (this has 512 Mb).
>>>> Linux images fetched from Github boot fine and simple things
>>>> work.  This is very minimal Linux, on 64Mb board I get:
>>>>
>>>> [root@milkv-duo]~# cat /proc/cpuinfo
>>>> processor     : 0
>>>> hart          : 0
>>>> isa           : rv64imafdvcsu
>>>> mmu           : sv39
>>>>
>>>> [root@milkv-duo]~# df
>>>> Filesystem     1K-blocks   Used Available Use% Mounted on
>>>> /dev/root         770048 177105    549526  25% /
>>>
>>> This must be the "largest" one, not that 64 MB,
>>> from what I see ("Available 549526" and its
>>> prompt "root@milkv-duo")? Correct?
>>
>>No. 'df' report "disc" (actually SD-card) space.  'free' reports
>>RAM:
>>
>>[root@milkv-duo]~# free
>>              total        used        free      shared  buff/cache   available
>>Mem:          28972       14496        4148          76       10328       11720
>>Swap:             0           0           0
>>
>>As you can see "total" is about 29Mb with 4Mb free.  I put total in
>>quotes because part of RAM is reserved and in default configuration
>>there is large hunk reserved for media (camera, TPU, etc).
>>
>>Concerning prompt, the 64Mb boards runs Linux and by default offers
>>root login.
>>
>>--
>>                              Waldek Hebisch
> 
> For what it is worth.
> I have ported the ciforth model (only 64 bits,the 5.4.0 level) onto
> linux running on a riscv, taking advantage from earlier Dutch
> implementation of noforth for triecky code words (UMD/MOD).
> http://home.hccnet.nl/a.w.m.van.der.horst/lina.html
> As usual, all words are extensively tested, all words are documented.

Thanks, works on Milkv.

> Once you have mapped the io space in virtual space and access it
> via VMA-IO, you can apply all knowledge gained from the documentation
> of the underlying System On a Chip.
> For this particular board the printed circuit layout, the schematics
> (9 pages) and a full 1000+ page documentation of the SoC (Allwinner
> D1) is available. That is why I bought it.

For Milkv there are schematics and chipset documentation (I did not
check how complete it is).

-- 
                              Waldek Hebisch