[syslinux] Memdisk and big floppy images

H. Peter Anvin hpa at zytor.com
Mon Jun 25 11:10:53 PDT 2018

On 06/18/18 13:06, R S via Syslinux wrote:
> The narod.ru images are super outdated (FreeDOS kernel 2028) unfortunately.
> If you are interested I could provide a 5MB FDD image template based on
> FreeDOS 2041 kernel (the latest available at that time in 2014) where you
> would just inject your ROM and EXE (and possibly adjust autoexec.bat to
> autostart/apply the FW update). It's a minimal FreeDOS FDD image that
> defaults to a clean boot with bare minimum settings (selectable in
> config.sys) and I used this template over several years for a variety of
> server FW updates. (FreeDOS hasn't been much updated over the years,
> however I just found that 2042 is now available on Github.)

It's worth noting that DOS in general doesn't necessarily handle large
floppies well and making sure the geometry values in the FAT superblock
matches what MEMDISK provides is essential.  An absolute maximum is
probably 120487K (117 MiB) with a 255x15x63 geometry.


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