Apple-1-HW
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Apple-1-Mini
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README.md
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*This build is currently in progress*
This project is a shrinked replica of the Apple 1.
It's built around a 6502 CPU, 6821 PIA (Peripheral Interface Adapter), RAM and ROM chip - just like the original Apple 1.
But it uses an Arduino Nano to enable serial communication between the Apple 1 board and an external computer that acts as terminal.
That means you can't hook up a keyboard and monitor directly to the board (yet).
This project is a minified replica of the [**Apple 1**](https://en.wikipedia.org/wiki/Apple_I).
It's built around a 6502 CPU, 6821 PIA (Peripheral Interface Adapter), RAM and ROM - just like the original Apple 1, but it uses an Arduino Nano to enable serial communication between the Apple 1 board and an external computer that acts as terminal.
That means you can't hook up a keyboard and monitor directly to the board (yet!).
The project is heavily inspired by the [*Briel Computers Apple 1 Replica*](http://www.brielcomputers.com/wordpress/?cat=17) and [*The Ben Heck Show*](https://github.com/thebenheckshow/158-tbhs-apple-1-replica)!
**What I have done:**
- [Redesigned the circuit](https://github.com/DutchMaker/Apple-1-Mini/blob/master/design/DesignSpark/revision1/schematic%20-%20Schematic.pdf) so I would fully understand every aspect of it.
- Designed a PCB that can be easily produced and included in a **modular DIY kit** for anyone that wants to build this at home.
- Programmed the ROM so it only contains BASIC and the Woz Monitor (memory monitor).
- Programmed the ROM so it only contains BASIC, Krusader (assembler) and the Woz Monitor (memory monitor).
- Written firmware for the Arduino to enable serial communication in a way that gives the real *Apple 1 feeling*.
- Written a simple utility to upload data to the computer. This proved to be difficult with existing tools as there need to be specific delays in sending the data.
@ -22,6 +21,8 @@ The project is heavily inspired by the [*Briel Computers Apple 1 Replica*](http:
- Release several varations of a DIY kit for this project (PCB only, PCB + passives, PCB + passives + casing, complete kit, etc.) so others can easily build the computer at home.
**Pictures of revision 0 (very first PCB based on the schematic to verify that it functions properly):**
<img src="https://github.com/DutchMaker/Apple-1-Mini/raw/master/docs/revision0.jpg" width="450" />
<img src="https://github.com/DutchMaker/Apple-1-Mini/raw/master/docs/screenshot.png" width="450" />
*(Revision 1, which is designated to be the first production revision, is currently being tested)*
<img src="https://github.com/DutchMaker/Apple-1-Mini/raw/master/docs/revision0.jpg" width="450" />
<img src="https://github.com/DutchMaker/Apple-1-Mini/raw/master/docs/screenshot.png" width="450" />
<img src="https://github.com/DutchMaker/Apple-1-Mini/raw/master/docs/running_basic.png" width="240" />