pkimpel.retro-220

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Paul Kimpel 06a4eb3f08 Release emulator version 0.00e:

1. Rework the partial-word operators for better efficiency.
2. Correct emulated processor clock update during I/O operations.
3. Centralize common I/O initialization and termination code.
4. Correct statistics calculations in schedule().
5. Correct timing for integer and floating divide operators.
6. Correct remainder shifting in floating divide.
7. Implement diagnostic monitor window, opened by double-click on retro-220 logo on home page.
8. Correct timing for ConsolePrinter carriage control functions.
9. Implement simple demo programs pre-loaded into memory.

2017-05-13 18:44:56 -07:00

emulator

Release emulator version 0.00e:

2017-05-13 18:44:56 -07:00

software

Commit version 0.00d:

2017-04-29 13:41:02 -07:00

webSite

Commit initial BALGOL transcription WIP.

2016-11-07 08:06:03 -08:00

webUI

Release emulator version 0.00e:

2017-05-13 18:44:56 -07:00

.gitignore

Commit initial BALGOL transcription WIP.

2016-11-07 08:06:03 -08:00

index.html

Commit preliminary 0.00a emulator files for Processor and Control Console cloned from retro-205.

2016-12-29 10:27:45 -08:00

LICENSE.txt

Commit BALGOL compiler transcription WIP as of 2016-12-18.

2016-12-18 15:25:07 -08:00

README.md

Commit BALGOL compiler transcription WIP as of 2016-11-13.

2016-11-13 07:02:53 -08:00

README.md

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/ElectroData/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/