Please be aware, there is a long story behind (before) this.

If you just want to see Doom running, you can click here - but you will miss the interesting parts :)

Here is the full documentation about the Agfa Compugraphic 9000PS:

• Part 1: PC Archeology: This computer is not what I expected. (Agfa Compugraphic 9000PS)
• Part 2: Troubleshooting and repurposing the Agfa Compugraphic 9000PS
• Part 3: Reverse engineering the Agfa Compugraphic so I can fix it
• Part 4: We ran Doom on a 40 year old printer controller (Agfa Compugraphic 9000PS)