Does this mean that using coreboot, computers with UEFI can boot FreeDOS?
On Wed, Jan 9, 2019 at 9:52 AM Ivan Ivanov <qmaster...@gmail.com> wrote:
> If you've a Q about putting FreeDOS inside opensource coreboot BIOS,
> or any other coreboot-related questions, please let me know :)
> And btw there is a coreboot supported motherboards page available
>
> чт, 3 янв. 2019 г. в 13:01, Ivan Ivanov <qmaster...@gmail.com>:
> >
> > Really happy I am to tell you : FreeDOS floppy is working perfectly as
> > a part of coreboot+SeaBIOS opensource BIOS image ! ( inside Lenovo
> > G505S quadcore AMD A10-5750M based laptop with 16GB RAM installed ) .
> > After you build coreboot, it's super easy to add a floppy of any
> > supported size (1.44MB/2.88MB/etc) with one simple command :
> >
> > ./coreboot/build/cbfstool ./coreboot/build/coreboot.rom add -f
> > ./build/freedos.img -n floppyimg/freedos.lzma -t raw -c lzma
> >
> > and then you will always see FreeDOS available as "Ramdisk" boot entry
> > inside your SeaBIOS boot menu.
> >
> > Although this FreeDOS floppy is quite frugal and doesn't include a lot
> > of things which could've been tested , at least
> > 1) there were no errors reported during its' booting ,
> > 2) both internal and USB keyboards are working great ,
> > 3) and even "beep" system sound is working ;) Very good!
> >
> > Perhaps I could remove FDSETUP and put lots of cool/fun things there,
> > especially since it's possible to extend a floppy from 1.44MB to
> > 2.88MB "double sized floppy" and currently FreeDOS occupies just 715
> > KB inside my 4MB BIOS SPI flash chip thanks to LZMA compression. While
> > I have more than 3MB out of 4MB free, because - unlike fat closed
> > source proprietary UEFI (which might contain backdoors also) -
> > coreboot together with SeaBIOS payload occupy less than 1MB :)
> >
> > coreboot could be installed without any soldering, simply by using
> > CH341A USB SPI programmer (supported by opensource flashrom software)
> > + SOIC8 test clip for attaching to the BIOS chip . Together they cost
> > about $10 with free shipping from China, and there's a pretty detailed
> > flashing manual at DangerousPrototypes wiki: just type "flashing BIOS
> > chip bus pirate" in your search engine and it should be a top result
> > ("bus pirate" is another more expensive programmer but the ending part
> > of manual contains the instructions for CH341A + there are useful
> > links to various SOIC8 test clips and detailed pictures)
> >
> > If you have any testing requests or simply questions regarding that
> > coreboot+SeaBIOS setup, I am always happy to help you :D
> >
> > P.S. What is great about this particular coreboot-supported laptop, is
> > that Lenovo G505S doesn't contain any ME/PSP hardware backdoors inside
> > its' CPU , is quite powerful and could be bought used for just
> > ~$100-$150, although to upgrade it to 16GB costs about $100 . Just
> > need to make sure there is A10-5750M CPU installed, because some G505S
> > versions had a weaker A8, and although it is possible to upgrade since
> > CPU isn't socketed, that could cost another $50 . Also there are 3
> > versions regarding the discrete GPU: only integrated HD 8650G (from
> > A10-5750M) , that integrated + discrete HD 8570M , that integrated +
> > discrete R5 M230 . R5 M230 is about 4% faster but more rare. Even if
> > you don't need a discrete GPU ( since its' performance is similar or
> > could be even below than integrated - because you could install fast
> > 1600MHz CL9 while discrete will always have its' own slower 1333MHz
> > CL9 / 1600MHz CL11 ) - "with discrete" versions have two heatsinks
> > instead of one so your CPU is cooling better.
> >
> > Best regards,
> > Ivan Ivanov,
> > open source firmware developer
>
>
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