This file is not software you download officially; it is a "dump" extracted from physical hardware using custom firmware (CFW).
A single line of text appeared, typed in real time: biosdsi9.rom
– Typical BIOS ROMs range from 4 MB to 32 MB (roughly 4,194,304 bytes to 33,554,432 bytes). If biosdsi9.rom is 1 MB or smaller, it might be a boot block or option ROM, not a full system BIOS. If it is 512 KB or less, it could be a VBIOS for an old GPU. This file is not software you download officially;