Lars: Yes, your questions have already been answered elsewhere [but perhaps not on this list]. A partial list of sites with many further details is below. However, the essence is exactly as you suggest: a PS/2 interface was deliberately chosen for Project Oberon 2013 because it is a very simple serial interface. A USB interface would involve more code than the entire rest of the system requires (both hardware and software), and would therefore compromise the educational goal of building a system which can be easily understood as a whole. [Perhaps a poor paraphrase on my part, of one of the true goals. See Wirth's "Project Oberon" texts.] For similar reasons, a VGA interface was selected rather than HDMI or other more modern video interface. Regarding your second paragraph concerning USB keyboards/mice with converters, people have had mixed results. Some converter/USB combinations work, some don't, some can even damage the board. Using a "Real" PS/2 mouse is recommended. I saw a thread discussing details which I can't find again quickly right now. Regarding an "OberonStation 2.0" with updated interfaces, we'll see. In the meantime note that the Pipistrello supports an HDMI interface. Monochrome VGA seems to me a current (and very reasonable) limitation of the Project Oberon implementation, which could be changed if an individual or team implements and integrates updated VGA or a full HDMI interface in Lola2 or Verilog (hardware part) and Oberon (software part). The 1Mb memory limitation (for software, data, AND video memory) of most current physical implementations of Project Oberon 2013 is a significant reason that monochrome VGA was selected. For the key resources (documentation and code) for Project Oberon 2013, see: http://www.projectoberon.com/ https://www.inf.ethz.ch/personal/wirth/ For details on the OberonStation itself, see: http://oberonstation.x10.mx/ http://oberonstation.x10.mx/smf/index.php http://forum.6502.org/viewtopic.php?f=10&t=3496 Of interest, see also the Pipistrello with Oberon Wing, and the Pepino: http://www.saanlima.com/store/ http://saanlima.com/forum/ Chris Burrows has also an "embedded" version targeted by AStrobe for RISC5, which can be used in situations which do not necessarily even have a keyboard, mouse, or video. http://www.astrobe.com/RISC5/default.htm http://www.astrobe.com/forum/index.php I expect other custom implementations will also appear. For some interesting discussions, see https://news.ycombinator.com/item?id=10474653 [regarding OberonStation] https://news.ycombinator.com/item?id=10792046 [regarding OberonStation] https://news.ycombinator.com/item?id=8620053 [Project Oberon 2013 edition] https://news.ycombinator.com/item?id=9847955 [Project Oberon] also search google for "project oberon site:news.ycombinator.com" That's probably much more than you wanted for an answer. Sorry to ramble. -- John Roberts