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Building an 8-Bit Computer – Now With Instructions 4 May 2012 | 06:30 pm
I have been thinking about doing an Instrucables article on my computer project for a while now as the goal of this project being on the internet in the first place is to help people with a similar go...
Test Time 26 Apr 2012 | 04:23 pm
I just finished wiring up the NVRAM chips to the computer. They are being addressed by a 8-bit program counter separate from the computer’s control counter. The control matrix changes its control word...
NVRAM Programmer 22 Apr 2012 | 03:01 am
For the control matrix of my computer I am using some NVRAM chips to store a 16-bit control word for the various registers and control wires of my CPU. I decided not to use EEPROM as the chips that I ...
Microinstructions Done 19 Apr 2012 | 08:06 pm
I finished the microinstructions for the control matrix of my computer. The block diagram on the upper left is the architecture of the computer itself. The chart below it is a list of OP codes for dif...
The Bulk of My Computer 19 Apr 2012 | 07:59 pm
After a month I finally received my breadboards from China and can start finishing the breadboard work on my computer. I now have all of the registers constructed as well as the ALU. Everything is con...
Control Matrix Programming 19 Apr 2012 | 07:53 pm
A CPU consists mainly of registers (places to store values) that have to be controlled by, you guessed it, a control matrix. The control matrix outputs a control word, CON, whose bits activate the nee...
The Display 19 Apr 2012 | 07:41 pm
For the display I wanted something more interesting than a simple binary readout. I decided to go with the retro look and use some IV-9 russian Numitron tubes that can be conveniently driven by 5V wit...
Two Useful Books 19 Apr 2012 | 07:25 pm
Without the textbook Digital Computer Electronics by Albert Malvino I wouldn’t have been able to even start this project. If you are considering building, or even learning about a computer using TTL t...
First Parts 19 Apr 2012 | 07:15 pm
The first parts that I purchased for my computer included two breadboards and the logic chips to build a simple Arithmetic Logic Unit that could preform addition and subtraction on 4 bits. Initially I...
