The GIER computer was built around 1960 by the Danish company, Regnecentralen.
I'm working on a simulator, making it possible to execute GIER programs on a PC.
The simulator is written in C, and developed in Linux to run under X11. A version for Windows is also available. The code is released as Open Source.
The latest version is available here (source and Windows binary): 20100713.exe (5.2 Mbytes)
Special version with larger control panels (only necessary, if you run Windows): 20100713large.exe (5.4 Mbytes)
Please note: You'll need some C programming experience to compile the source code under Linux.
Included are a lot of tapes containing the basic operating system, help-3, and a GIER ALGOL 4 compiler.
The versions 20041106 and later have a copy of the contents of the GIER machine at University of Aarhus. This was provided by Claus Hilberg.
The windows zip file is a self-extracting archive, created in Linux with zip and wiz from Info-zip. Store it on your disc (e.g. in c:\gier) as 20041106.exe, and double-click on it.
Under Linux, you can unpack the archive using the unzip command.
A special version has been made just for playing Nimbi on a Windows machine. Download and unpack nimbi.exe, change directory to where you've unpacked the two files, and start GIER.exe.
The Windows version has been made using MinGW.
I've written a short tutorial to get you started using this simulator.
Claus Hilberg has tested the speed of the GIER machine using the LINPACK test (rewritten in GIER ALGOL 4), and compared it to the top500.org list. The GIER (0.66 KFlops) is 54.010+9 times slower than the fastest machine today (November 2003: 35.86 TFlops). This is equivalent to a doubling of CPU speed every 13.5 month. The GIER ALGOL source code is available here, and the result here.
You can find more GIER software in our Software database.
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