KIM-1

Programming in Assembly Is Brutal, Beautiful, and Maybe Even a Path to Better AI Whether your chip is running a vintage computer game or the latest DeepSeek model, it’ll reward you for speaking its native language.

Yes!!! Programming in Assembly Is Brutal, Beautiful, & Maybe Even a Path to Better AI www.wired.com/story/progra... #coding #programming #artificialintelligence

YouTube video by Ben Eater 8-bit computer update

Ben Eater’s definitive 6502 YouTube series and DIY computer.

youtu.be/HyznrdDSSGM

The most complex part of 6502 family assembly language is not the instructions, but the addressing modes -- there are a lot of them, and I don't want to front-load the viewer with a bunch all at once. Instead, they're introduced a bit at a time.

The 'alternative' 6502 mnemonics where letters are added to the standard mnemonic to specify the addressing mode - eg LDAIM 100

This format came about because existing macro assemblers could be easily adapted to support the 6502 processor. MOS, the makers of the 6502, didn't support this format.

GitHub - thinkyhead/6502-Tools: Tools to make working with 6502 Assembly Language, AtariBASIC, and bAtariBASIC more enjoyable, especially with Sublime Text. Tools to make working with 6502 Assembly Language, AtariBASIC, and bAtariBASIC more enjoyable, especially with Sublime Text. - thinkyhead/6502-Tools

In celebration of the 50th birthday of the 6502 here is a cleaned up and repaired Atari BASIC source based on the original "Atari BASIC Source Book" by Bill Wilkinson, Kathleen O'Brien, and Paul Laughton. Uses `make` with `ca65`.

github.com/thinkyhead/6...

#mos6502 #Atari #BASIC

YouTube video by Commodore Tutorials I Wrote a Commodore 64 Book

(Another) new #C64 #assembly language book 🥰
#KeepItCommodore #Commodore64 #6502asm

youtu.be/KGKU-3zHuOU?...

New blog post - Changing SD2IEC Device IDs
blog.tynemouthsoftware.co.uk/2025/10/chan...
Several techniques you can use to change the device ID of your SD2IEC from ID #8 to ID #9, and several reasons why you shouldn't do it.

Forbidden Instruction

YouTube video by 8-Bit Show And Tell MOS 6502: 50 Years, Top 50 Instructions

This is the content I’m here for. The 6502’s best instructions.

youtu.be/2lIcQ_tAwP0

One of the most difficult BBC Micro books to obtain. Is there anyone out there that has a copy? I managed to get an ex-library copy that was re-bound. Curious to know how many are actually around. It was withdrawn from sale for legal reasons - it contained an annotated disassembly of BBC BASIC.

Ich bin ein Amiga?

YouTube video by NesHacker Basics - 6502 Assembly Crash Course 01

Got your own fav 6502 tutorial video you would recommend to those new to the ways of the 8bit wonder?

youtu.be/yEiNs7pKNh8

In the fine tradition of capitalism, now that someone has shown weakness I can push my book - you know, if you want a retro book that isn’t written by someone pandering to the right mixam.co.uk/print-on-dem...

Assembler Tynemouth Minstrel 4th computer on blue silicone soldering matt.

Photo of TV screen showing the power on screen of the Tynemouth Minstrel 4th. The on screen text text says: "ZX81 BASIC FOR MINSTREL 4TH V1.4"

Do mighty trees grow

New blog post. Something a little different, a look at the wonderful 74HC74 (and 74LS74, 74HCT74 etc.) and some of the many and varied things you can do with it.
blog.tynemouthsoftware.co.uk/2025/10/the-...
It all started when I had this brilliant idea.......

Fortran is for scientists. Real programmers use 6502 Assembly.

#programming #shitpost

Compute Magazine vol 1 issue 1 from 1979. The best/only mag for the prevalent 6502 architecture machines of the time.

Compute Magazine vol 1 issue 1 from 1979 (before they excitedly changed the name to Compute! for vol 2) - focused mainly on good ol' 6502 machines.

Part 2 on the optimization of the Quicktake 150 decoder, focusing on the 6502 assembly, is out. It is more low-level than the first one, but I tried to comment the examples and explain as best as I could […]

YouTube video by masterhit1 KIM-1 demo

KIM-1 Demo

youtu.be/z_9Ariaou-0

The 6502 had no multiply or divide instruction. Developers faked it with loops, shifts, and a lot of cleverness.

Interesting..

Happy 50th anniversary to the MOS 6502! Could Microchess for the KIM-1 be the first commercially available game for the 6502? The yellow booklet of the left is version 1.0. You typed it in yourself but there was an optional cassette. Let me know your thoughts. #vintagecomputer #retrocomputer

Benchmarks for two different implementations of an emulated 65C02 microprocessor. The times are identical for each of the four tests.

It had been gnawing at me for a couple of years: For an emulated 6502 with 256 opcodes, is an array of functions faster or slower than a big switch statement? I figured the difference would be tiny. I was not prepared for identical performance. I guess the C# optimizer is pretty good.

‎VirtualKim - 6502 Emulator ‎The 6502 microprocessor changed the world. Released in the 1970’s, it was the reason that home computers were within the reach of many hobbyists. This app re-creates the 6502 CPU and some of the hard...

What a great day to try some 6502 on your phone!

apps.apple.com/app/id154835...

Was there a Rockwell KIM-1? A myth or? Yes and no.
There is a KIM-1 by Rockwell in 1977.
No, it is a MOS Technology KIM-1 PCB.
Rockwell added documents with Rockwell title pages and contents 99% MOS Technology.
The Rockwell KIM-1 is just an OEM product!
retro.hansotten.nl/6502-sbc/kim...

You will never be satisfied! :)

New KIM-1 (for me, it is from 1976), a Rev B
Nice addition to the first edition and the Rev A.

It does not. It has registers instead (haha).

Optimizing a 6502 image decoder, from 70 minutes to 1 minute A little walkthrough on an image decoder algorithm's high-level optimization, in order to make more digestable for a 6502 processor.

Optimizing a 6502 image decoder, from 70 minutes to 1 minute
https://www.colino.net/wordpress/en/archives/2025/09/28/optimizing-a-6502-image-decoder-from-70-minutes-to-1-minute/

https://news.ycombinator.com/item?id=45412022