Oberon RISC Emulator
This is an emulator for the Oberon RISC machine. For more information, see Niklaus Wirth's site. For newcomers to the Oberon family of operating systems, the document Using Oberon in the Project Oberon section is a must-read.
To build the emulator, you need the SDL2 library and a C compiler that understands C99 (GCC and clang are fine).
To install the needed packages on Debian, Ubuntu and derived distributions, use this command:
sudo apt-get install build-essential libsdl2-dev
See your distribution's documentation if you're using something else.
After that, build the emulator using the command
I can't give much support for OS X, but I've had many reports saying it works fine. The main stumbling block seems to be that there are two ways to install the SDL development files: Unix style and Xcode style, as explained in the SDL Mac OS X FAQ.
For Unix style, build using the command
For Xcode style, use
There's a pre-compiled version in Github's Releases section.
See the SDL site for how to set up a compiler for Windows. It's fiddly.
Alternatively, you can set up a cross compiler from Linux, which is also rather fiddle, and build with a command such as: (This is mostly for my own future reference.)
make CC=i686-w64-mingw32-gcc-win32 \ SDL2_CONFIG=/usr/local/cross-tools/i686-w64-mingw32/bin/sdl2-config
You can find an up-to-date disk image in the DiskImage/ directory. These images contain a full Project Oberon 2013 system, with all source code, symbol files, etc.
They also have a few tweaks for better integration with the emulator (though it should still work fine on real hardware):
The Display module supports variable display resolution. (The original module was hardcoded for 1024x768.)
There's a Clipboard module for basic clipboard integration, documented below.
Command line options
risc [options] disk-image.dsk
--fullscreenStart the emulator in fullscreen mode.
--mem <megs>Give the system more than 1 megabyte of RAM.
--size <width>x<height>Use a non-standard window size.
--ledsPrint the LED changes to stdout. Useful if you're working on the kernel, noisy otherwise.
Keyboard and mouse
The Oberon system assumes you use a US keyboard layout and a three button mouse. You can use the left alt key to emulate a middle click.
The following keys are available:
Alt-F4Quit the emulator.
Shift-Command-FToggle fullscreen mode.
F12Soft-reset the Oberon machine.
First start the PCLink1 task by middle-clicking on the PCLink1.Run command. Transfer files using the pcreceive.sh and pcsend.sh scripts.
Alternatively, use the clipboard integration to exchange text.
The Clipboard module provides access to the host operating system's clipboard using these commands:
- The wireless network interface is not emulated.
- Proper documentation is needed.
Copyright © 2014 Peter De Wachter
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