Mark J. Koch
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markjkoch.bsky.social
Mark J. Koch
@markjkoch.bsky.social
240 followers 310 following 100 posts
Retired Digital Alchemist. Cyber Monk. Technologist. Containment Specialist at -redacted-. Sun Microsystems Labs Alumni. Former SFX specialist at Blue Man Group. Hobbies: Game Design in Java/JavaFX, Analog Synth, PCB design, Robots, Gardening, Cooking.
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markjkoch.bsky.social
Although I knew of something called Burger DOS and Rebecca's nickname to it, I had no idea what it was use for in relation to Neuromancer C64. Now I know too! So today, two people have answers regarding this tool that Becky created.
November 19, 2025 at 12:18 AM
markjkoch.bsky.social
All I see is Arthur Dent and Zaphod Beeblebrox. #hhgtg #douglasadams #hitchhikersguidetothegalaxy #thehitchhikersguidetothegalaxy #towelday #dontpanic #scifi
September 29, 2025 at 4:40 PM
markjkoch.bsky.social
OK. Why not? SPOILER ALERT! ... Labeled as "Suggestive" to blur image for those who don't want to see it before it's a real thing.
KiVAD render of the MOS KIM-1000. A modern take on the KIM-1 CPU board from the 1970's. I really wanted one of the original KIM-1 boards as a kid but, being a kid, no money. However, when I reached college, my degree included theory and hands on with our very own Z-80 systems that we got to build using raw components and wire wrap! Worked the same as the KIM-1 and we even had to write our own operating program. The following semester we got to expand our Z-80s with the peripheral of our choice. I built a full robot that I'd already been working on since I was 14-ish. I programmed it to work like the "Big Track" toy. I handed all my original documentation, schematics and code to the professor to get my grade (should have made some photocopies at least). Never did get any of that back. This was a couple years before things like floppy disks and ease of and access to printers.
August 10, 2025 at 3:17 AM
markjkoch.bsky.social
Do I show the 3D render of the whole thing or do I make everyone wait for the final real system in a couple months?
August 10, 2025 at 2:46 AM
markjkoch.bsky.social
Hey Johnson! You can always reach out to me for Arduino questions. Also, Adafruit website has many tutorials, products and code for doing the exactly kind of stuff you want to do.
August 9, 2025 at 10:43 PM
markjkoch.bsky.social
Fixed it!

github.com/CircuitMonke...

Get a breakout PCB. Just upload to @oshpark.bsky.social
github.com/CircuitMonke...
Break out PCB for a 1/8inch type TRS audio jack. KiCAD library symbol and footprint available via the Circuit Monkey KiCAD libraries. A corrected version of the F**d Up and wonky KiCAD default library for this part.
July 17, 2025 at 9:24 PM