6502
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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.
NES-dev
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Hello everyone, random question. I want to know the coolest thing you've ever programmed/ worked on? or the thing you're most proud of.
I'm a data scientist and work in Python, but my favorite personal project was learning 6502 Assembly and making a (very simple) game for the original NES. It was really fun going from such a high level language immediately down to about as low level as you can get. It taught me a ton about hardware, what my code is actually doing when it runs, and gave me a new angle to appreciate old school videogames.
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Back to work again
Here's my space shooter based on your tutorial. I got stuck trying to implement a static HUD using sprite 0 hit and nametable switching, hoping to give it another shot soon.
What are some alternatives?
Cosmic-Conquest-1982 - (Historic) Resurrecting one of the first real time strategy (RTS) games from 1982. Written in Forth.
6502 - DB6502: 65C02 based computer inspired by BE6502
hbc-56 - Homebrew 6502 on a backplane computer
revs-beebasm - Fully documented and annotated source code for Revs on the BBC Micro
py65 - Emulate 6502-based microcomputer systems in Python
TaliForth2 - A Subroutine Threaded Code (STC) ANS-like Forth for the 65c02
sixty5o2 - Micro Kernel / Bootloader for Ben Eater's 6502 Computer
mandelbrot - A Mandelbrot Explorer implementation. I use this program to generate all of my avatars.
sunset - Retro sunset scene on NES
msbasic - Microsoft BASIC for 6502 (Commodore, Apple, KIM-1, AIM-65, OSI, ...)
connectedNES - 📡 A WiFi "modem" that connects your NES to the internet. Includes sample Twitter client.