Extract BIOS ROM extensions
includes the tool fontdump (to extract the fonts from your video bios roms)
make sure you can read /dev/mem (be root)
chmod +x ree.sh
./ree.sh
or use the c version (much faster, and does checksum on the rom extension)
make # or gcc ree.c -o ree
./ree
will scan your system memory, address c0000 - f0000 in 512 byte steps for identification of rom extensions (55,aa), if found it will calculate its size (byte after id, multiplied by 512) and saves that to a .rom file.
ported to shell from the pascal version of 1997 original (dos/win9x) version is ree.exe and ree.pas in ree.zip
Probably most interesting is this:
cat /proc/driver/rtc
cat /proc/driver/nvram
and its raw data
xxd -g1 /dev/nvram
as most system bios are bigger than 64k nowadays (128k or 256k) and them are only 64k memory window reserved, they are not dumped completely. use flashrom for complete dumps.
flashrom, https://github.com/flashrom/flashrom
seabios, https://seabios.org/SeaBIOS
coreboot, https://coreboot.org
vga font, https://int10h.org/oldschool-pc-fonts/
amiga font, https://github.com/rewtnull/amigafonts
cool-retro-term, https://github.com/Swordfish90/cool-retro-term
bdf2sfd, https://github.com/fcambus/bdf2sfd
