Replica 1 plus Users Manual Chapter 2: Introducing the replica I plus computer The replica 1 computer was designed to give those people a chance to see what an Apple I computer looked and acted like. Most people have never seen an Apple 1 running and the replica 1 helps us see what Woz had created. The goal of the replica 1 project is to simulate the functional aspects of the Apple 1 so that all hardware and software designed for the Apple 1 can be used. The plus is based on the limited edition tenth anniversary edition shown below. Figure 3: Key component features on the limited edition replica 1 ten Not just a simple hobby board.
The replica 1 contains features such as Apple 1 compatible expansion slot, and a USB connection for power and serial to USB connection. The USB to serial port allows you to run a terminal program on your Mac or PC and you can load and store programs to/from your PC to the replica 1. The USB mini connector gives a modern standard so there is no more hunting for power supplies. Most USB power supplies with at least 500mA will work great. We even offer a power supply and cable if you can't find one. Firmware upgradeable: The replica 1 ten includes a Parallax Propeller micro-controller for the onboard I/O.
The source code is open source and is included with the replica 1 on the CD and updates can be made via free software to program the Propeller from Parallax website. Programmers are welcome and encouraged to use the Briel Computers forum to announce custom developed features and improvements to the firmware. The owner takes all responsibility for any firmware installed that is not released or approved by Briel Computers. Using untested firmware could damage the replica 1 plus, however with the Parallax software, restoring is easy. © Briel Computers 2014 page 8