CPU8

Ben Eater SAP-1 8-Bit Computer

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Description

Students or software programmers who want to learn how computers work will love this app. 
CPU8 simulates the SAP-1 (Simple As Possible) 8-bit bread board computer that was famously the star of a series of videos by Ben Eater.
Using it, you can control a fully realized computer that utilizes microcode to illustrate the operation of individual computer instructions and their interrelationships with general purpose registers, program counters, memory registers, instruction registers, bus and memory through "control words".
In addition, CPU8 contains an assembler that allows you to write programs and convert them into the machine language of the included simulated computer. A full programming manual is included.
Write, assemble and run programs using this 8-bit computer to see how the process works from start to finish.
FEATURES
- Assembler for the 8-bit computer (with manual)
- the 8-bit computer simulator
- 16 instructions - 3 pseudo instructions - 16 address spaces
- control the speed of the simulated computer clock
- single step through programs or run to the end
- 7 sample assembler programs to get started
- links to all the Ben Eater design and teaching videos
- A short history of computing through the ages (37 chapters)
Suitable for classroom study, independent study or just for the sheer enjoyment of playing with a computer that you can watch and learn from. No individual information is accessed.
Oh, did we mention it has wonderful flashing lights!
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CPU8 FAQ

  • Is CPU8 free?

    Yes, CPU8 is completely free and it doesn't have any in-app purchases or subscriptions.

  • Is CPU8 legit?

    Not enough reviews to make a reliable assessment. The app needs more user feedback.

    Thanks for the vote

  • How much does CPU8 cost?

    CPU8 is free.

  • What is CPU8 revenue?

    To get estimated revenue of CPU8 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.

User Rating

5 out of 5

3 ratings in United Kingdom

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Ratings History

CPU8 Reviews

My Favorite App

I out-pizza'd the Hut on

United States

Ever since I was a primary student, I’ve been obsessed with programming. Started with prewritten block-code sites (I was introduced to Code.org and Scratch in a 6th-grade CS class), then progressed to more intermediate languages like JavaScript and C++. After watching a video about Boolean logic, I realized that I needed to learn more about the underlying technology in order to get a deeper understanding of the subject I love. My initial plan was to disassemble random Win32 executables on my desktop, like cmd, but I didn’t really know anything about compiling at the time; all of my attempts ended in failure. Ended up postponing my interests for a few months, until I landed a spot in an IT class. It was the first time that I was intimately introduced to the hardware that makes up a PC, and I instantly became intrigued by the systems and techniques that allow it to function. Began researching the fundamentals of microprocessors and dynamic memory, and I’m currently working on my own 8-bit demo in JavaScript! Ultimately, the biggest struggle in my journey was commercialization. Having to wade through dozens of those awful PowerPoint-style processor diagrams just to find a useful guide was awful. Almost every nugget of information I found on the web was either totally oversimplified (likely designed for marketing purposes rather than to actually educate) or ridiculously complex (circuit schematics for legitimate engineers, not hobbyists like myself). It took me years just to get a solid grasp on the concept of machine code. But stuff like this are what kept me going. Small, yet practical articles and videos created by someone with the same fondness for low-level tech that I possess. Someone who isn’t just trying to make a quick buck, but instead genuinely seeks to inform their audience. They’re like little trail markers, guiding the way for those who dream of following in their footsteps. This is my favorite app. Download it for yourself to figure out why. Even if you never assemble a single program, the information that it contains will last you a lifetime.

I really want to like this app…

BasenjiBuddy on

United States

This application is impressive, and the developer shows a great deal of passion in the implementation. However, if you are visually-impaired it is completely in accessible. Starting from the main screen onward, there are several obstacles to using it if you are low - vision or blind. I attempted to navigate the developers website, but again the color scheme was too difficult to make that a possibility. It is my sincere hope that these minor design issues can be corrected, because I see this as a very useful learning tool.

Nice tool to go along with the build

LoveOfCountry on

United States

Only problem I’m having is there is no sound with your hint videos. The Ben Eater YouTube videos are fine. Tried on two different phones. iPhone X and Xs MAX. Thanks for putting this App out.

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Tutorials, Programs, Quiz, FAQ

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