Uploaded July 2025 | Updated September 2026, 1 week ago

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Calculating the Fibonacci system has become something of write of passage for homebrew CPUs. However, when I demonstrate the CPU calculating Fibonacci numbers I frequently get asked if I can handle bigger numbers. It's time to answer that question!

0:00 Introduction
1:18 Single Step Execution Demo (8-bit Fibonacci)
3:27 16-bit Fibonacci
4:19 Tests on the PC
7:58 Size limit discussion
9:46 A new Approach
10:38 High level code
14:32 BigNum_Add
17:34 BigNum_2Ascii
20:02 First Test
20:20 Debugging
22:03 Success!
22:37 Outro