From somewhere (makesomething fromscratch) has always been the romance of engineers, such as self-provisioning the operating system, writing the system core itself (such as Linux). However, at home, I have never heard of a "one" CPU from scratch. Recently, a YouTuber has made a self-designed CPU with a jumper on a solderless universal board (commonly known as a breadboard).
CPU (central processing unit), such a small magical high-tech black square, is the core component of modern computers. Most computer equipments are 64-bit CPUs. The technical level is deep and the design is complicated. How easy is it to design and build a new CPU? In the 1970s, the 8-800 processors such as Intel8008 and ZilogZ80, which were just in their infancy, were relatively primitive and should be easier to do. Still, it's not easy to develop a new 8-bit CPU from scratch.
Isn't it a big company like AMD, Intel, ARM, etc. Is it possible to build a CPU yourself? YouTuber Paulo ConstanTIno proved to everyone that this is not something that can't be done. He made a completely self-developed computer project called Dream catcher on his Github -- redesigning and crafting every necessary component of the computer.
For untrained people, Constantine's CPU works like a bunch of wires on a board. His work is based on the 74HC series of CMOS integrated circuits, which are plugged into the breadboard and jumped up with wires. He spent two days drawing circuit diagrams and actually making them in a week. At present, it is still very simple. The program needs to be done with the DIP switch. According to the movie, only a simple program has been run: counting from 0 to 255 (indicated by a row of 8 LED lights in binary), playing scales, playing the sound Mario Brothers theme song.
Jane is simple, but the film was shot at 8 times. Now it has evolved to 16 bits. It has a total of 256 instruction sets (instrucTIons). Now it has a simple BIOS (basic input and output system), and of course it is Another group of messy breadboards. Thankfully, you can finally output the screen to the screen. The next goal of Constantine is to do the function of connecting the keyboard, so that it is much easier to write the program, and the final target can run MS-DOS or Minix system.
This way, using the breadboard to make the CPU prototype is like a fool, but today we think PCB printed circuit board printing, hardware description language (Verilog VHDL), FPGA (programmable integrated circuit) technology is taken for granted, and 1980 Previously, there was no such technology, and the CPU prototype was built like this. A self-made person who is determined to rebuild the wheel from scratch, naturally uses the ancient method to make the CPU prototype.
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