Pera SAP-I

Pera SAP-I

Simple As Possible Computer



Does anyone have an idea about early computers? The age before Microcontrollers/ Microprocessors? I have just now completed a project that takes me into that time.

This is an 8-bit Minimum Computer (AKA Simple As Possible Computer - SAP) that made from simple logic ICs, flip-flops and a few memory modules. It has a memory of 16 bytes and its maximum clock speed is not more than 5 Hz.

The whole design is based on SAP-I Architecture and design was obtained from Ben Eater’s Youtube Channel [2]. Currently, it has 9 instructions (based on Intel 8080 instructions) and can be programmed it using machine language (That means programming from 1s and 0s)

The project was started as a project for CO221: Digital Design Course, Department of Computer Engineering, University of Peradeniya.

All the Printed Circuit boards were designed from the basics by us using Fritzing, fabricated by using the CNC, Builder_V3 and soldered and assembled by us. It took 2 months to complete the fabrications and another month for build motherboard (30x40cm) and debugging.

The project is free and open source under Apache License 2.0.

Special thanks to

  • Dr. Kamalanath Samarakoon for giving the idea & source materials about SAP-I
  • Dr. S.D. Dewasurendra
  • Miss. Narmada Balasooriya, Miss. Thilini Dahanayaka and all the instructors of the Department of Computer Engineering, University of Peradeniya




Team

Nuwan Jaliyagoda

Nuwan Jaliyagoda

Suneth Samarasinghe

Suneth Samarasinghe

Pubudu Premathilake

Pubudu Premathilake

Dilshani Karunarathne

Dilshani Karunarathne

Wishma Herath

Wishma Herath

Pasan Thennakoon

Pasan Thennakoon

Irfan Mohammad

Irfan Mohammad


Resources / Links