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 > > > _______________________________________________ > Freedos-devel mailing list > Freedos-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freedos-devel >
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