From securityonline.info
Usage: unicorn-bios [OPTIONS] BOOT_IMG
Options:
--help / -h: Displays help.
--memory / -m: The amount of memory to allocate for the virtual machine
(in megabytes). Defaults to 64MB, minimum 2MB.
--break / -b Breaks on a specific address.
--break-int: Breaks on interrupt calls.
--break-iret: Breaks on interrupt returns.
--trap: Raises a trap when breaking.
--debug-video: Turns on debug output for video services.
--single-step: Breaks on every instruction.
--no-ui: Don't start the user interface (output will be displayed to stdout, debug info to stderr).
--no-colors: Don't use colors.