Thanks, I had already played with building SeaBIOS+coreboot in the "default" configuration for QEMU with various common payloads.
I meant I haven't gotten around to poking at the SeaBIOS code for larger floppies yet :) R Mike Banon <mikeb...@gmail.com> schrieb am Di., 16. Apr. 2019, 01:39: > You need to build a coreboot image for QEMU with SeaBIOS (master) > selected as the default payload. CBFS size should be increased to a > size large enough to contain your floppy (or floppies, btw here's a > patch to support multiple floppies at CBFS - > https://review.coreboot.org/c/coreboot/+/32238 , and you could install > it with this script - https://pastebin.com/raw/hv9sSuMU , more details > here - > https://mail.coreboot.org/hyperkitty/list/seabios@seabios.org/thread/CKWLNTZU43SAHQ26USNFASORA2H5BXBE/ > ) . After it will be compiled, you could use cbfstool to add/remove > floppies to/from CBFS of coreboot.rom, with LZMA compression to reduce > their size: > 1) Add: ./build/cbfstool ./build/coreboot.rom add -f > ./path_to/myfloppy.img -n floppyimg/myfloppy.lzma -t raw -c lzma > 2) Remove (e.g. to add a new version later): ./build/cbfstool > ./build/coreboot.rom remove -n floppyimg/myfloppy.lzma > 3) Print a memory map: ./build/cbfstool ./build/coreboot.rom print > Run this coreboot.rom by executing this QEMU command: (some floppies are > 64-bit) > qemu-system-x86_64 -L . -m 768 -localtime -vga vmware -net > nic,model=rtl8139 \ > -net user -soundhw ac97 -bios ./coreboot.rom -boot menu=on -serial stdio > Best regards, > Mike Banon > > On Mon, Apr 15, 2019 at 6:12 PM Rafael Send <flyingfishfin...@gmail.com> > wrote: > > > > I haven't gotten around to poking at SeaBIOS yet, I'm still wondering > how to test my large floppies. > > > > Syslinux appears to install to them fine, but QEMU doesn't seem to like > booting them with -fda. > > > > Do you guys have any suggestions on how to test booting the large floppy > images? > > > > Cheers, > > R > > > > > > > > Mike Banon <mikeb...@gmail.com> schrieb am Mo., 15. Apr. 2019, 05:35: > >> > >> Personally I think that either this guy did something incorrectly or > >> there's a Windows 3.1 bug. Meanwhile, Rafael's Linux-based OS is going > >> to boot from this floppy like it's a ramdisk, so hopefully should be > >> indifferent to the custom floppy sizes and would work. I share the > >> same hopes for KolibriOS: although its' 1.44MB floppy contains really > >> a LOT of stuff, some cool things like console emulators didn't fit - > >> so I'm going to create the extended Kolibri floppy version, which will > >> be either 2.88MB or some custom ( 1.44MB * X ) size. > >> > >> On Sun, Apr 14, 2019 at 6:12 PM Kevin O'Connor <ke...@koconnor.net> > wrote: > >> > > >> > On Fri, Apr 12, 2019 at 11:38:52AM -0700, Rafael Send wrote: > >> > > Hi, > >> > > I'm working on stuffing a bootable Linux distro into coreboot. In > QEMU I > >> > > already succeded by using coreboot's built-in kernel loading > mechanism, but > >> > > that's without SeaBIOS. > >> > > > >> > > I'd love to have it as a SeaBIOS payload so I can also boot other > things, > >> > > but I guess I'd have to create a custom-sized floppy image for this > or > >> > > figure out how to create an ELF payload out of a Linux kernel (I'm > open to > >> > > either, but I wasn't able to find any documentation on the ELF > method). > >> > > > >> > > The guy who put Win 3.1 in coreboot attempted the floppy method, but > >> > > according to his article he did not find success with this method > due to > >> > > unknown and complex issues in the floppy-side logic of SeaBIOS. > >> > > > >> > > So, I'm making the question explicit: What would it take to support > >> > > custom-sized floppy images? In particular, I'm thinking of a 16MB > device... > >> > > >> > My vague recollection is that various OSes had hard coded expectations > >> > on the types of floppy drives supported. I did not think it would be > >> > easy to support a floppy size larger than 2.8MB. > >> > > >> > It is possible to emulate a hard drive in memory. However, that would > >> > require code changes. > >> > > >> > Cheers, > >> > -Kevin > >> > _______________________________________________ > >> > SeaBIOS mailing list -- seabios@seabios.org > >> > To unsubscribe send an email to seabios-le...@seabios.org >
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