In general the X68000 RED ZONE is an ordinary Compact with a small overclocking circuitry and a switch to activate it. Otherwise they both have identical motherboards. Here is a nice collection of pictures which were kindly contributed by our forum member Costa. Click on them to enlarge.

Compact front	RED ZONE front

Compact back	RED ZONE back

Ordinary Compact	RED ZONE with overclocking circuit

The mystery of the black wire revealed	What makes the magic work