Good Gear Guide
Image gallery: Building an Apple-1 replica from sc...
A 40-pin expansion connector (far right) was used by earlier models of the Replica 1, but with the addition of a 44-pin, Apple-1-compatible expansion port in this, the third edition, the connector is no longer necessary for expansion.
Two new parts not found in the Apple-1 will be installed nearby: a connector for an ATX power supply and the aforementioned 44-pin expansion port, similar to those found in the Apple II.
Image gallery: Building an Apple-1 replica from scratch