KIM-1 - Imapenguin

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KIM-1

A collection of 6 posts

MOS paper tape format

MOS paper tape format

I built the world's worst paper tape reader some weeks ago. It works pretty okay on anything with a USR-style port like a KIM-1 clone or a VIC-20. 0:00/1× Paper tape was (and is) an interesting medium. Sure it's hard to work with and fragile, but it also

A little more speed from the 6502

A little more speed from the 6502

Can we get a little more speed from a 6502 than we did last week? Almost certainly. The memory test we used was a general-purpose one. It's flexible and reusable. The price is some speed. Let's try and make it faster. The test machine for this one I'm going to

Marketing Parody Image by Gregorio Naçu at c64os.com

How fast can a 6502 transfer memory

The amazing Gregorio Naçu posted the article title graphic this week to bring attention to the venerable 6502 processor and poke fun at Apple's M2 chip marketing slides. He's doing probably the most ambitious single-person Commodore 64 project I know of and has a fantastic blog. Apple claims the new

Almost primes with TinyBASIC on the KIM-1 clone: PAL-1

Almost primes with TinyBASIC on the KIM-1 clone: PAL-1

Bill Gates has been a controversial figure in the Computer World for 50 years now. Back in 1976, he famously (infamously?) wrote a letter bemoaning what he saw as rampant piracy of BASIC. Micro Soft was selling their version of BASIC, which is quite good for a whopping $150. This

64 Bit Addition and Products on Commodore: The Wheat and Chessboard problem

64 Bit Addition and Products on Commodore: The Wheat and Chessboard problem

Dealing with large numbers in computing has been an attractive problem area for a long time. Using an average calculator might lead you to believe that it's too tricky for most applications. 0:00/1×But it's not that difficult. And to prove it, we're going to implement this calculation

Fibonacci 1-10 on the KIM-1 (and clones)

Fibonacci 1-10 on the KIM-1 (and clones)

Sometimes there's an absolute joy in doing something the hard way to REALLY understand what's happening. I struggled (still struggle) with wrapping my mind around using the display on the KIM-1. The best way (for me anyway) to be motivated to learn something is to have an outcome in mind