Lite-Brite PC - GadgetDon
This is a mini-itx motherboard with a 533 MHz EPIA processor.  It fits perfectly into the opening.  There won't be space for a CD-ROM, but I can use a USB CD-ROM when necessary.

This is a mini-itx motherboard with a 533 MHz EPIA processor. It fits perfectly into the opening. There won't be space for a CD-ROM, but I can use a USB CD-ROM when necessary.