Replica I

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Board of a Replica I

Replica I is a compatible replica of the Apple I computer developed by Steve Wozniak and designed by Vince Briel in 2003. Wozniak has approved the reproduction and use of the original software.

The replica also uses the MOS Technology 6502 chip and the simple interface and television connections of the original with a simplified board design with partly new components. Two microcontrollers are used, which replace the discrete transistor-transistor logic (TTL) and some components that are no longer available. The Replica I offers both the Apple I BASIC in the ROM of the original as well as the "KRUSADER Assembler" programmed by Ken Wessen , which also contains a disassembler and debugger . Thus most of the functionality of the original could be retained. Where was the "delete" button still not used.

Apple had no objection to the installation, since Wozniak's design was older than the company itself and the company had given its approval. Previously, Apple had released all materials to the "Apple I Owner Club".

The Replica I was sold by Briel's own company, Briel Computers , who sold the computer as a prefabricated model and as a “build-it-yourself kit”. Sales has meanwhile been transferred to ReActivemicro.

The serial I / O card built into the original Replica I enables programs written for the system to be loaded and saved onto the hard disk of common PCs , as the cassette drives originally used are hardly or not at all available. The Replica I can also be connected to the original Apple I computer via the I / O card.

In addition to the I / O card, the successor to the Replica I also integrates a USB interface and an external power supply unit with power-on indicator. This removes the dependency on a PC power supply unit.

In the third edition of the USB interface by an AVR microcontroller was used for video generation by a Parallax Propeller - microcontroller replaced. The power supply and programming of the Replica I can be done via the USB connection to a PC. The 2 ROM modules available make it possible to use Apple 1 Basic or Woz Monitor and Applesoft lite .

In 2013, a special edition of the computer was sold for the tenth anniversary.

The prices for the Replica I plus range between $ 135 and $ 190. External RAM modules, power supplies and keyboard adapters as well as a module with Compact Flash interface and debug board can be purchased as an extension.

A-One

In 2006, Franz Achatz and San Bergmans presented another Apple 1 replica, the A-ONE .

Individual evidence

  1. ↑ Ken Wessen: KRUSADER. Ken's Rather Useless Symbolic Assembly Development Environment for the Replica 1. (No longer available online.) August 14, 2009, archived from the original on August 26, 2018 ; accessed on May 20, 2020 (English).
  2. ↑ Apple I Owners Club | Apple fritters. Retrieved May 20, 2020 .
  3. ↑ replica 1: Briel Computers. Retrieved May 20, 2020 .
  4. ↑ The first Apple computer as a replica with Compact Flash. Retrieved May 20, 2020 .
  5. ↑ Circuitcellar ( Memento of March 12, 2009 in the Internet Archive )
  6. ↑ ReprapUniverse.com. Retrieved May 20, 2020 .

literature

  • Tom Owad: Apple I replica creation : back to the garage, Syngress, Rockland, MA 2005, ISBN 193183640X .

Web links