The Sharp X-1 Twin was a weird combination unit, featuring the X-1 computer (a Z80-based precursor to the X68000) and an integrated PC Engine. I use the term integrated loosely, the two systems shared the same shell, but little else. It’s more like an Amstrad MegaPC than a Sega/IBM TeraDrive.
Sharp were no strangers to odd hybrid hardware. They had previously released the Famicom Titler, a Famicom + video titling unit, and the Famicom Twin, a Famicom with a built in Famicom Disk System, and two TVs, one with an integrated Famicom and the other with a Super Famicom inside.
That said, I opened one up for your enjoy.