: MAME is very picky about file integrity. The modern dl-1425.bin file should have a CRC32 of d6cf5ef5 . If your file has a different checksum, MAME will report it as "missing" even if the filename is correct.
: In many older ROM sets, the necessary file was named qsound.zip . If you are on MAME 0.201 or newer, you can often simply copy and rename qsound.zip to qsound_hle.zip . qsoundhlezip mame exclusive
