PS2 *.XSQ files, "Sony H80" and "Device Modem"

WheatyPPC

Member
I have found a bunch of files ending in .XSQ, which is likely related to sound effects/music. (It was in a folder "SOUND").
The file(s) were found from game Doko Demo Issho: Toro to Ippai [SCPS-15081]. (Are files on the PS2 standardized at all? Or are they unique to each Dev?)
And all of them start with "XSEQ", and have the words "SONY H80" "Device Modem" like in the image i attach, and are all 2~5 Kilobytes.
PS: tried to open in newest(2026.8) verze of XLights available on Github, fails to open.

I'm curious to know, would this be related to the internet adapter? I can't find anything related to an "SONY H80".
Or, Have you ever seen an XSQ/"XSEQ" file on any other game?
 

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