A boot sector virus, sometimes referred to in the context of "virus ti rom bin" which seems to be a misspelling or misinterpretation, is a type of malware that infects the boot sector of a storage device, such as a hard drive, solid-state drive, or even a floppy disk. The boot sector is a critical part of a storage device that contains the code necessary to boot an operating system.
: The TI2 firmware is generally preferred as it includes all TI features and banks.
If you load a large bank like this into the TI's RAM, be aware that the Virus TI has a finite number of RAM slots. Flashing banks in and out via the Virus Control plugin can be tedious if you are in the middle of a writing session.