Hi Mike- I followed this method: http://failverse.com/creating-a-non-standard-size-bootable-floppy-image-for-...
That worked, the rest was just making SeaBIOS (at the time) try to read them, as per the discussion.
FWIW I managed to increase my ROM chip size from 8 to 16MB and stuff it with coreboot + Grub (which loads either SeaBIOS, Tianocore or a stripped-down TinyCore Linux). Works great, no need for floppies.
Good luck, please update with your results once you find something interesting / useful!
On Fri, Apr 3, 2020 at 10:34 AM Mike Banon email@example.com wrote:
Rafael, please could you share a working method of expanding a floppy from 1.44MB to i.e. 2.88MB ?
I'm back to this issue and noticed that popular Linux tools (i.e. gparted with libparted, fatresize, etc.) weirdly do not support resizing a FAT12 filesystem which the floppies have. Manually increasing the number or sectors with a hexedit - 0x13/0x14 bytes from 0x0B40 to 0x1680 and 0x18 byte from 0x12 to 0x24 - also didn't work for me (but I just learned about FAT structure and may be missing something).