8 bit computer, output module, problem solved Remember that annoying problem I spoke of? I solved it! It appears I had soldered two connections together by accident. Almost invisible, but still two outputs were connected, resulting in double displays on
8 bit computer, instructions and microcode When designing and building your own computer, you have to design and build your own instruction set as well. So that’s one of the things I’m doing right now. One of the functions of
8 bit computer, buildup status The status so far in pictures:
8 bit computer, Output Module complete Today I finished building and testing the Output Module for my 8 bit computer. See video and picture below.
8 bit computer, test the Output Module Today I hooked up my Output module – still on breadboard – to the signals from the PCB modules. As you can see in the video below, it works so far. At first,
Share 2014, keynote by Wim Veen A magnificent video about modern learning. Worth to spend some time on!
8 bit computer, building up the ALU The ALU Building up the heart of the computer, the two big chips are 74LS181’s (4 bit ALU’s, hence there’s two of them). The two little chips below them are the 74LS245 tri-state
8 bit computer, building the ALU I’m in the process of building the Arithmetic and Logic Unit (ALU) for my 8 bit computer. So far, as you can see, the complete B register and half of the A register are
8 bit computer, clock circuit The second print I made is the computer clock:
8 bit computer, program counter and reset I’m busy transitioning my 8 bit computer from the breadboards I built it on to experimental PCB’s. They will be on a bus print. Here’s the first video: