Hi Louis, coreboot+SeaBIOS are meant to Replace your closed source
proprietary UEFI firmware.
So, if your motherboard is supported by coreboot (you could check it
at their coreboot board status page)
then you could replace your mb's closed source proprietary UEFI with
opensource coreboot+SeaBIOS.
Because SeaBIOS is a modern but legacy-style BIOS of course it will be
able to boot FreeDOS fine:
and not just in your traditional ways - from USB / CD-Rom / etc - but
also from inside the BIOS chip
if you would use this command below to add its' floppy image to
coreboot+SeaBIOS compiled image:
./coreboot/build/cbfstool ./coreboot/build/coreboot.rom add -f
./build/freedos.img -n floppyimg/freedos.lzma -t raw -c lzma
I already tested this way and it's working perfectly, but that FreeDOS
image doesn't contain any interesting stuff, so maybe I'd create my
own custom FreeDOS image with lots of wonderful things included and
will be always available to me as SeaBIOS "Ramdisk" boot entry
Best regards,
Ivan Ivanov
чт, 10 янв. 2019 г. в 20:49, Louis Santillan <lpsan...@gmail.com>:
>
> 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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