Glad to help you! ;-) About coreboot+SeaBIOS: I forgot to tell you
that these "AMD no-PSP" boards - G505S laptop / A88XM-E desktop /
AM1I-A mini-desktop - sadly got removed from a coreboot master, mostly
because we haven't got it working with "resource allocator v4" which
has been pushed on us by Intel. In the future we may find a way to
bring them back, but for now you may just downgrade the freshly cloned
coreboot with a "git reset --hard" command to a Nov 2022 version (back
to the time when the boards were still supported) and build for them.
More specific instructions could be found in this great manual by my
friend Mike - http://dangerousprototypes.com/docs/Lenovo_G505S_hacking

Also: while AM1I-A provides more interfaces, just 25W CPU and mini-ITX
form factor - to be honest, if compared to G505S / A88XM-E - this
AM1I-A is not as powerful, lacks IOMMU and the memory controller isn't
as great. And it's hard to find a good AM1 cooling nowadays - may have
to DIY - and Athlon 5370 is as rare as Yeti so might have settle for a
weaker 5350... Meanwhile things are much easier for the A88XM-E
desktop, although the A10-7*** CPUs aren't supported by coreboot
opensource code - so, despite this board has FM2+ socket, you can only
put FM2 CPUs like A10-6700 / A10-6800K. My personal preference is
A10-6700 because it's just slightly slower but 1.5x less TDP at the
same time - just 65W compared to 100W. And, being a non-K CPU, it is
less likely to be degraded by the unwise overclocking of a previous
owner.

By the way, here's a new Mike's interesting letter about the 5.25" fan
controllers - as well as about a new unfolding PC case with 5.25" and
3.5" slots which could be interesting for FreeDOS enthusiasts -
https://mail.coreboot.org/hyperkitty/list/coreb...@coreboot.org/thread/RDMSYKLAYZOSUXOMCZSXVGGQAOYQEV5A/

Best regards,
Ivan Ivanov

чт, 2 мар. 2023 г. в 19:41, Travis Siegel <tsie...@softcon.com>:
>
> Thanks for that.  This solves a whole host of issues I didn't even know
> I had.
>
> Been looking for a way to build a custom pc for myself that doesn't
> depend on any commercial vendors.  This is the perfect solution.
>
> On 3/2/2023 4:55 AM, Ivan Ivanov wrote:
> > Well, coreboot opensource x86 firmware will help you! The default
> > coreboot's payload is SeaBIOS - a modern legacy-style BIOS written on
> > C, without any UEFI crap. In addition, thanks to opensource - you can
> > finally trust that your BIOS doesn't have the backdoors / holes /
> > broken code hastily written for a bowl of rice by the lowest bidder.
> >
> > Of course, not every hardware is suitable for coreboot, so you'll have
> > to buy anyways. Personally, I can recommend the AMD boards without a
> > PSP hardware backdoor: Lenovo G505S laptop with A10-5750M, ASUS
> > A88XM-E desktop with A10-6700 / A10-6800K, and ASUS AM1I-A mini-ITX
> > micro-desktop with Athlon 5370 - which may be a close match for your
> > single-board-computer requirement (it has LPT, COM, etc.)
> >
> > More information can be found on the Internet (i.e. the manuals on
> > DangerousPrototypes website), or you can just ask me.
> >
>


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