[SeaBIOS] How much RAM is required?

[Markus Armbruster]

Watch this:

$ qemu-system-x86_64 -nodefaults -vnc :0 -monitor stdio -m 16k
    QEMU 1.1.50 monitor - type 'help' for more information
    (qemu) qemu: fatal: Trying to execute code outside RAM or ROM at 0x0000000000004000

Admittedly a silly thing to try.  I don't really expect SeaBIOS to work
with 16KiB of RAM.  But I'm curious: how much does it require?