> What? It's 1 byte, why wouldn't I think that?
You wouldn't think that an emulator, which openly states that its intention is the accurate preservation of digital (and, to an extent, analog) data, would care about a byte being changed?
Were you under the impression that the team keeps track of individual files' CRC32 and SHA1 hashes just for fun?
ROM_LOAD( "5e.cpu", 0x0000, 0x1000, CRC(18442c37) SHA1(fac445d15731532364315852492b48470039c0ca) )
When you mistype a password, does it baffle you as to why it doesn't work, because hey, "it's just one byte"? Really?