Anybody have any idea what this is? Got it in a box of boards. Only markings I see are Sequential Circuits Inc and on the back is PC099-1 Rev A. It appears to be Midway in nature due to the inspection sticker. The identifcation sticker is gone, Populated with a Zilog Z80A, 2 D4016C chips, an Eprom, (no I don't have a reader hooked up)D8253C and a MC68850P. Googling provided me with info that the company made synthesizers so I am guessing it is some sort of sound board. But to what?



