6502
RC6502-Apple-1-Replica
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| 6502 | RC6502-Apple-1-Replica | |
|---|---|---|
| 6 | 2 | |
| 284 | 136 | |
| - | - | |
| 7.5 | 0.0 | |
| 10 days ago | about 2 years ago | |
| Assembly | HTML | |
| - | GNU General Public License v3.0 only |
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6502
- Minimal bare-metal RISC-V project
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Running Apple 1 software on a breadboard computer (Wozmon) [video]
The Apple 1 ROM is quite a tight piece of coding. Just 256 bytes which implements basic console IO, and memory editing in hex. And still two bytes left over.
One version with lots of comments: https://github.com/jefftranter/6502/blob/master/asm/wozmon/w...
You can see a classic assembly language space optimizing trick at PRBYTE. It first prints the upper half of the byte in hex with call to the PRHEX procedure, then falls through to PRHEX again to print the second half. Two entry points to a common routine.
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KIM-Venture -- adventure game based on Colossal Cave written for KIM-1 computer (source code available)
The First Book of KIM programs
- It's quite BASIC
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Playing Cosmic Conquest, a old-style real-time strategy game, on my breadboard 6502
For a command line program I started out with getting WOZMON working and then began adding more capabilities similar to the Apple II system of old. I got tired of adding one-off functionality and discovered Forth when looking at programming languages suited for systems with limited resources. Look into TaliForth2 to get up and running fast on your 6502. The full program requires 24k ROM but can be slimmed down to fit in 16k pretty easily. I was inspired so I wrote my own Forth 2012 Standard version over the summer.
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Hey anyone tried to write an assembler for the 6502?
Jeff Tranter has a github with a ton of stuff 6502, including a mini assembler. Many others out there as well.
RC6502-Apple-1-Replica
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Running Apple 1 software on a breadboard computer (Wozmon) [video]
If you fancy playing along on a PCB, there's a mini backplane and SBC version here:
https://github.com/tebl/RC6502-Apple-1-Replica
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An original Apple-1 computer sells for $400k
Yes, all parts are still available although some are getting scarce/expensive. There's a UK chap who occasionally makes replicas:
https://twitter.com/Devilish_Design/status/10881650262786621...
If you want the experience without the cost, there's a 6502-Arduino hybrid you can build:
https://hackaday.io/project/26234-apple-1-mini
https://github.com/tebl/RC6502-Apple-1-Replica/tree/master/R...
The bare boards often come up on eBay.
What are some alternatives?
Cosmic-Conquest-1982 - (Historic) Resurrecting one of the first real time strategy (RTS) games from 1982. Written in Forth.
Orangetool - 📚 Control Functions For Single-Board Computers
hbc-56 - Homebrew 6502 on a backplane computer
bit-preserve - Project for capturing vintage, classic, aka old computer schematics in KiCad.
py65 - Emulate 6502-based microcomputer systems in Python
arisutea-pcb-stm32 - PCB design files for Arisutea STM32 Keyboard
NES-dev - A simple NES game written in 6502 assembly
apple1 - SmartyKit 1 computer construction kit drivers and software. (Apple 1-compatible)
sixty5o2 - Micro Kernel / Bootloader for Ben Eater's 6502 Computer
DietPi - Lightweight justice for your single-board computer!
TaliForth2 - A Subroutine Threaded Code (STC) ANS-like Forth for the 65c02
notus-angular - Notus Angular: Free Tailwind CSS UI Kit and Admin