The beginnings
In 2003 Vince Briel, working with Tom Owad, got the idea to design an Apple 1 replica. He looked at the Apple 1 circuit and took the easy parts: the 6502 and 6821, RAM, ROM.
The dificult part is the video circuit with hard to get parts and replaced that with a ATMega processor. He also added a PS/1 keybaord input and combined that with the parallel keyboard input circuit. The result was a functional replica of the Apple 1 on real hardware.
Vince then started Biel computers elling Replica 1 kits and assembled boards. Many revisions followed, hundreds were sold. The latest incarnation, the Plus, is still for sale, not by Vince who stopped in 2015, but by ReactiveMicro. The Brielcomputers support website and forums are still online.
My experience with the Replica 1 begin with the Replica 1 SE in 2007, the same period Vince made the Micro-KIM
What you can find here:
- Replica 1, first version
- Replica 1 SE
- Replica 1 TE
- Replica 1 TEN
- Replica 1 Plus
- Replica 1 Multi I/O Board
- Noise fix for Replica Ten
- Replica 1 slot expanders
- Replica 1 Cassette Interface
- Replica 1 software and hardware articles
- Pocketerm
Some photos of prototypes of the Replica 1:

Vince Briel looking proud of the working prototype!
Apple 1 Replica Creation Back to the Garage
Tom Owad’s book on the Apple 1, the Replica, electronics and much more.
You can read the book online at Applefritter or buy a cheap PDF version.
On the companion Cd you will find an early PCB design by Tom working with Vince. Here the circuit diagram.
![]() |
Apple 1 Replica design by Vince, drawn by Tom Owad |
See also:
This page is about the operation and use of the Rockwell Single-Chip RSC-FORTH system as implemented in the Rockwell R65...
Rockwell made many 6502 variants. Some were 'SOCs', complete computers in an IC. and Rockwell was strong in Forth, e.g....
I have two R6501 IC's. One came with the Glitchworks GW-R65X1QSBC-1 kit, a R6501Q. The other from ebay, a R6501AQ (A for...
I have recently acquired a R65F11 IC. This IC is part of the RSC (Rockwell Single Computer) Forth system. Rockwell Sin...