two Serial devices (usually printers) connected to it to be shared on an Omninet network. Internally the Utility Server was a single-board Z80 computer with 64 kB of RAM, and on startup the internal boot ROM retrieved its operating program from the File Server. The literature/documentation and software that shipped with the Utility Server included a memory map and I/O ports writeup. It was possible to replace the Utility Server's operating code file with a stand-alone copy of WordStar configured for the serial port, and to fetch and save its files on the file server. A dumb terminal connected to the first serial port then became an inexpensive diskless word processing station. A single Omninet was limited to 64 devices, and the device address was set with a 5-bit DIP switch: spending both sides of the dollar bill. Device zero was the first file server, device one was the Mirror or The Bank tape backup, the rest were user computers, or Utility Servers. Systems with more than one file server had them at zero and up, then the tape backup, then the user computers. No matter what the configuration, you could only have 64 devices. Corvus Concept In April 1982, Corvus launched a computer called the Corvus Concept'''. This was a Motorola 68000-based computer in a pizza-box case with a 15" full page display mounted on its top, the first that could be rotated between landscape and portrait modes. Changing display orientation did not require rebooting the computer - it was all automatic and seamless and selected by a mercury switch inside the monitor shell. The screen resolution was 720×560 pixels. Positioned vertically, the monitor displayed 72 rows by 91 columns of text; the horizontal resolution was 56 rows by 120 columns. The first version of the Concept came with 256 kB standard, and expanding the RAM to its maximum supported capacity of 1MB cost at the time. The Concept was capable of using more RAM, and a simple hack provided up to 4MB. The failure of the Concept was mostly related to its lack of compatibility with the IBM PC, introduced the previous August. The Concept interface, though not a GUI, was a standardized text user interface that made heavy use of function keys. Application programs could contextually redefine these keys, and the current command performed by each key was displayed on a persistent status line at the bottom