[SeaBIOS] Removing "legacy option ROM" from boot menu

Kevin O'Connor kevin at koconnor.net
Thu Sep 20 02:27:25 CEST 2012

On Wed, Sep 19, 2012 at 03:12:19PM +0200, Privat wrote:
> Hello,
> is it possible to remove the "legacy option ROM" entry from seabios'
> boot menu list? (I use QEMU).
> Using make menuconfig I tried to disable "Boot Interfaces --> Option
> ROMS". After compiling and using the bios.bin I only receive a black
> screen. My vgabios.bin is in its proper location.

The vgabios is an option rom, so disabling optionroms disables
execution of the vga bios.

> Note: This error only occurs when I disable the aforementioned
> function. Any clue how to solve this issue? I have seen screenshots
> where this entry doesn't appear so it seems it's possible to bypass
> this entry.

Something in QEMU is passing an additional option rom to SeaBIOS.  Try
extracting the debug information from seabios:

qemu -chardev stdio,id=seabios -device isa-debugcon,iobase=0x402,chardev=seabios ...


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