Modeled in Blender and rendered using Cycles Render. Final image created using the internal compositor. Decals and signage created using Inkscape.

The model is available for purchase on my CGTrader page here: https://www.cgtrader.com/3d-models/electronics/computer/commoder-pet

Screen image sourced from: http://blog.tynemouthsoftware.co.uk/2015/07/pet-microsd-user-guide.html