a29f2cac5d
1. Implement centralized pop-up window opening mechanism to enforce a delay between pop-up opens. This is to satisfy new restrictions on multiple pop-ups imposed by the Apple Safari 11.0 browser. 2. Correct Reload-Lockout behavior and format band 6 initialization in B220CardatronInput. 3. Correct translation of sign digits and skip-to-channel behavior in B220CardatronOutput. 4. Strip sign digit from search/scan argument word when storing into B220MagTapeControl T register. 5. Remove option for 1000-word system memory size and correct handling of memory size list selection in B220SystemConfig. 6. Change reel-to-reel magnetic tape name from DataReader to TSU in B220SystemConfig.
The Burroughs 220 was a late-1950s, decimal, vacuum-tube, core-memory computer system. Some consider it to be the last of the major vacuum-tube computers.
The 220 was the follow-on product to the ElectroData/Burroughs Datatron 205. It was initially developed as the ElectroData Datatron 220 but renamed after Burroughs bought ElectroData in 1956. The system was initially released in 1958. It did well with both scientific and commercial applications, but being a vacuum-tube system at the beginning of the transistorized era, was only modestly successful.
The ElectroData Division of Burroughs went on to create a number of successful systems after the 220, including the B100/200/300 series, the B1700/1800/1900 series, the B2000/3000/4000/V Series, the B5000/5500, and finally the B6000/7000/A Series, which are still produced and sold today as Unisys ClearPath MCP systems.
The main goal of this project is creation of a web browser-based emulator for the 220.
A second goal is reconstruction of the Burroughs Algebraic Compiler (BALGOL), an Algol-58 compiler written for the 220 by a team from Burroughs that included Joel Erdwinn, Jack Merner, Donald Knuth, Dave Dahm, and Clark Oliphint.
The contents of this project are licensed under the MIT License.
| Related Sites | URL |
|---|---|
| Emulator hosting site | http://www.phkimpel.us/Burroughs-220/ |
| Burroughs 205/220 blog | http://datatron.blogspot.com |
| Datatron 205 site | http://www.phkimpel.us/ElectroData-205/ |
| Documents at bitsavers | http://bitsavers.org/pdf/burroughs/electrodata/220/ |
| BALGOL compiler listing | http://archive.computerhistory.org/resources/text/Knuth_Don_X4100/PDF_index/k-1-pdf/k-1-u2196-balgol220compiler.pdf |