This is a DEC branded Olivetti PC. It has a 386 CPU and an Intel maths co processor. Unfortunately for as long as I’ve been aware of and had it, it has never worked. I did get it to power up, after which is did POST, and eventually find parts I thought would make it into a working system. Sadly on first power on after fitting the parts, the PSU failed. The power light flickered and the fan spun for a second before stopping. I hope to either repair the original power supply or work out how to wire up a more modern standard PSU to the motherboard if that is not possible. Annoyingly it has a proprietary Olivetti PSU design and I can’t find any documentation on it or it’s pinout.