KIM-1 still going strong! Now need some expansion hardware to get it to “do” something. #6502

All what is known about the MOS Technology 6530 and 6532 from 1975 . retro.hansotten.nl/6502-sbc/653... Used in KIM-1, Jolt, Chessmate, Pinball machines, Commodore diskdrives. Testing and dumping the ROM in the 6530 with the Backbit Chiptester Pro V2:

#ChuckPeddleDay It took some time to finally publish this program for the KIM-1 and today is a good day for it. Udo Juerss is the author. KIM-1 Marquee retro.hansotten.nl/kim-1-marque/ source and binary. Shows running text on a KIM-1 LED display

cott Lombard started many years ago on a replica of the Jolt. Quite a challenge, since only photos are known of the Jolt. He succeeded in finishing a working replica retro.hansotten.nl/6502-sbc/jol... He also made RAM and ROM cards, and made a Tiny Basic Enhancement package,

I put together an electronics kit + book intended as a gentle introduction to transistors and early computer logic gates (resistor-transistor logic or RTL). I set up a Tindie store page for the little over a dozen I have readied. (I'll create a web site soon.) www.tindie.com/products/jca...

The KIM-1 Simulator has seen some small updates, to version 1.5.4 Fresh version at retro.hansotten.nl/6502-sbc/kim... The behaviour of the TTY/LED keypad switch is now closer to how the real KIM-1 behaves.

Wait a minute - Jean-Michel Jarre used a KIM-1 on Equinoxe? C’est fantastique! www.ina.fr/ina-eclaire-...

and also recall what this video led to: github.com/eduardocasin...

KIM-1 Rev D building progress. All passive components acquired and soldered on. Keyboard assembled, will be connected via low profile pin connector. Next step is testing power distribution to all IC sockets. Then the Reset and NMI circuits with the 556 timer.

Were you a Pascal programmer? #coding #pascal

How to build a KIM uno on your own? Order the PCBs from pcbway, order all electronic parts from Aliexpress, program the Arduino, solder everything together, print the case. ( I ordered parts for some more builds - christmas is nigh) #kim1 #kim-1 #65o2

The most popular piece of hardware for the Apple II was made by Microsoft. And it was a Z80. devblogs.microsoft.com/oldnewthing/...

Another revision of my observations on KIM-1 revisions changes. The keyboard changed from Rev B to Rev D, requiring new holes in the PCB and so some traces had to move. Note the change in style of the PCB layout, not curved but straighter lines.

A rare opportunity to get a TIM 6530-004 IC. The RRIOT used in the Synertek Jolt and Super Jolt. www.ebay.nl/itm/13667445...

Wee bit more reliable than the KIM-1 I have.

Having a severe cold, so no soldering or programming, but time to do some KIM-1 document upgrades to First Book of KIM, KIM Hints and the Circuit Diagram poster. Higher quality. more versions. retro.hansotten.nl/circuit-diag...

First KIM-1 50 years! Now I am building a KIM-1 myself! Rev E reference, the BOM is excellent! I am not aiming for an exact replica, I want to test things with it, so IC sockets. PCB KIM-1 Rev D and BOM by Eduardo Casino github.com/eduardocasin... Parts mostly from Mouser, and from my old stock.

KIM or KIM-1? retro.hansotten.nl/kim-tim-kim-...

Spotted at PRGE.

The 2K Symbolic Assembler, by Robert Denison, assembler and editor in 2K! This small program allows to assemble a program up to 1K From Jeff Tranter available source and binary format KIM-1, SYM-1 ,Apple 1. I made a higher quality scan of the book retro.hansotten.nl/6502-sbc/kim...

A dead KIM-1? Fix it! In October 2025 I have revised the page about the KIM-1 diagnostic board with sources of the tests in MOS Technology standard assembler syntax . The EPROM can now be build and modified with modern tools. retro.hansotten.nl/6502-sbc/kim...

Qualcomm acquires Arduino company, that will be the end of the open source open hardware that defined the makers revolution.

What changed in the KIM-1 Revisions? Blog post here: retro.hansotten.nl/kim-1-revisi...

KIM-1, were IC sockets used? Before I saw the last revision, Rev G, I had never seen an original KIM-1 with IC sockets. All ICs were soldered right into the PCB. Now I have a KIM-1 Rev G an photo of Dick Dral with white IC sockets. So the last iteration of the KIM-1 did have IC sockets.

It's alive! Keypad/Display #PCB module for my #kim-1 replica is working! Mostly based on the original 1970s #schematic, using modern parts. I wrote a PCB test fixture using Arduino and #rp2040 #raspberrypipico module from #adafruit. My first time using a rp2040 was mostly painless. #65C02

Yay! The main #PCB for my MOS #KIM-1 replica arrived today from #JLCPCB! The sub-boards seem to fit. Bringup will take awhile since there's a gross chip-pin-numbering error on one of the smaller boards and I'll have to re-fab it. But I'll be able to partially assemble it and test a few things.

What a great day to try some 6502 on your phone! apps.apple.com/app/id154835...

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

aaaaaaaaaaaand the order is placed. retro-spy.com/product/kim-... @zoggins.bsky.social

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...

To celebrate the 50 years of the 6500 family I have added two manuals in good quality to the manuals section: MCS6500 Hardware Manual August 1975 First Edition, Version 6500-10. – MCS6500 Programming Manual by Synertek, version 6500-50. retro.hansotten.nl/6502-sbc/kim...

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

Happy 50th Birthday, 6502!

Some of the oldest EPROMs I have. Once I had those connected to my KIM-1, we designed an EPROM programmer and EPROM card for it in 1978.

If you have a KIM-1 Rev B, D or E, I am looking for those to complete my KIM-1 collection. They are worthwhile, so I will pay a good price for it.

And yes, it does run the recently open-sourced Microsoft BASIC.

The updated Virtual KIM 6502 Emulator app has gone live: apps.apple.com/app/id154835...

Found in my archive, my first years in DEC we still used flowchart templates, on paper! ANSI X3.5.-1970

MS BASIC 6502 Open source. The source leaked already several years ago, pagetable has a nice post on that: Microsoft BASIC for 6502 Original Source Code [1978] – pagetable.com The Easter egg KIM-1 version answer 'A' to Memory Size question, clears the screen prints 'WRITTEN BY WEILAND AND GATES'

Bringing BASIC back: Microsoft’s 6502 BASIC is now Open Source | by Scott Hanselman & Stacey Haffner. opensource.microsoft.com/blog/2025/09... #oss #basic #programming #microsoft #opensource

Microsoft have released 6502 BASIC to open source. Read more here: opensource.microsoft.com/blog/2025/09...

Bringing BASIC back: Microsoft’s 6502 BASIC is now Open Source opensource.microsoft.com/blog/2025/09...

I had some fun typing in an old KIM-1 program published in Compute! 13. retro.hansotten.nl/6502-sbc/kim... Shown on youtube: youtu.be/-Gw63u-WVuk

It's been ages since I did anything with my 6502 homebrew computer, so here is a video about benchmarks against classic machines from back in the day - always a controversial topic!😂 #homebrewcomputer #mos6502 #basic #80s #6502cpu youtu.be/pQFLyB10Uj8

www.forum64.de/index.php?th... A variant of Lee Hart's 6502 badge, to celebrate the 6502 birthday #50birthday6502

Try the beta today! testflight.apple.com/join/vIXAtuLo

Got an iPhone or iPad? Try out this beta of a KIM-1 / Apple 1 / 6502 Assembler and let me know what you think. testflight.apple.com/join/vIXAtuLo

I can trace the first time a KIM -1 left the factory at MOS Technology to January 1976. The last KIM seems to be made in 1981. As reported by Eric Rehnke in Compute June 1981. #50yearsKIM1