Here's the insides. The label on the IC reads OEM8A/32B and the only other markings that I can see on the PCB read "509-009 Rev 1.1"
Googling tells me that the CH Products Pro Pedals contain a PCB marked "509-009 Rev 5.0", so I'm going to suggest that we're leaning away from a third party mod and towards one done by CH themselves.
Whether or not it's a prototype, I can't be sure. I've left a voicemail with tech support at CH, to ask whether they can tell me any more about it.
Searching google for "CH Products" "Mach IV" "USB" -ebay produces fewer than 20 hits and no evidence at all that they ever marketed such a thing. Changing "Mach IV" to "Mach V" doesn't help either.
So, I'm thinking either a prototype or a short run custom product that they made for a government or industrial customer.
I'll report back if I learn anything further.
usbjoystick2.jpg
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