A collection of BASICODE programs by various authors
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Basicode-2a Basicode-2A README: add links Mar 25, 2017
Best_of_Basicode_1 fix stray line in BOB1 README Mar 1, 2018
Best_of_Basicode_2 improve formatting BOB2 README Dec 11, 2016
Best_of_Basicode_3 improve formatting BOB3 README Dec 11, 2016
Best_of_Basicode_4 replace BOB4 sources with corrected new extracts from tape Mar 26, 2017
Best_of_Basicode_5 remove PC-BASIC modifications from BOB5 Dec 4, 2016
Best_of_Basicode_6 add README for BOB6 Dec 9, 2016
Best_of_Basicode_7 add image and formatting to BOB7 README Dec 9, 2016
KC-Club remove EOF ^Z from BASICODE programs Apr 3, 2017
SIGM-235 fix MBASIC conversion errors in SIGM Apr 11, 2017
Various remove EOF ^Z from BASICODE programs Apr 3, 2017
Verzamelcassette_1 rename VC1 files Dec 10, 2016
Verzamelcassette_2 rename VC2 files and update README Dec 11, 2016
Verzamelcassette_3 fix typo in VC3 file name Dec 18, 2016
Verzamelcassette_5 fix B11 on VC5 Dec 17, 2016
Verzamelcassette_6 add index for VC6 Dec 18, 2016
Verzamelcassette_7 add index for VC7 Dec 18, 2016
Verzamelcassette_8 fix VC8 A15 based on extract with bandpass filter (checksum pass) Mar 27, 2017
Verzamelcassette_9 fix A19 on VC9 Dec 19, 2016
Wiegand_Fillinger_Basicode_2 remove PC-BASIC modifications from W&F code Dec 4, 2016
tools update checksum tool to enable checksums for multiple files Apr 17, 2017
BASICODE.rst fix RST typo May 20, 2017
README.rst clarify summary in README Mar 4, 2018



BASICODE was a 1980s-era cross-platform BASIC standard designed to allow software transmission by radio. It consisted of the following elements:

  • A subset of classic Microsoft BASIC common to the BASIC dialects of the target platforms
  • A standard set of subroutines to provide functionality for which no common BASIC syntax exists
  • An audio modulation format intended to be readable by data cassette players

See the summary of the BASICODE specification for details.


This repository is a collection of BASICODE programs. You can run these in the online BASICODE interpreter, for which the source code is also available.


BASICODE was developed in 1980 by Dutch broadcaster NOS for its hobby-electronics radio programme Hobbyscoop. Its purpose was to enable radio transmission of software to owners of numerous mutually incompatible 8-bit platforms.

BASICODE users would tape record the modulated program from the radio. They would need a native translation program for their platform, which would decode the common audio format and supplement the BASICODE program with the platform implementation of the standard subroutines. If everything went well, they would then be able to run and use the program.

The NOS started BASICODE transmissions in 1982 on medium wave Dutch radio. Other broadcasters followed suit: the Dutch TROS, the British BBC, the West German WDR and the East German Radio DDR all at one time or another performed regular BASICODE transmissions. In re-unified Germany, Deutschlandsender Kultur continued to transmit BASICODE until around 1992.

BASICODE programs were also distributed on collection recordings: mostly these were cassette tapes, but there were audio CDs and gramophone records as well, as well as diskette sets. Many of these sources additionally contained translation programs for one or more platforms.

While the authors and broadcasters retained copyrights on the programs, they encouraged them to be shared widely for non-commercial purposes.


This repository contains BASICODE programs from a number of sources. I have decoded them from the original audio recordings, where available, and corrected transmission failures using context, alternative sources and checksums. I have concentrated on the portable BASICODE sources and have omitted platform-specific code such as translation programs. The following titles are included:

Title Medium Year Standard Language
Chip Shop BASICODE 2 Tape 1984 BASICODE-2 English
Wiegand & Fillinger - Basicode Tape 1984 BASICODE-2 German
BASICODE-2A Tape 1985 BASICODE-2 English and Dutch
SIG/M volume 235: BASICODE Diskette 1985 BASICODE-2 English and Dutch
The Best of BASICODE 1 Tape 1985 BASICODE-2 Dutch
The Best of BASICODE 2 Tape 1985 BASICODE-2 Dutch
The Best of BASICODE 3 Tape 1986 BASICODE-2 Dutch
The Best of BASICODE 4 Tape 1987 BASICODE-2 Dutch
The Best of BASICODE 5 CD 1988 BASICODE-2 Dutch
The Best of BASICODE 6 Diskette 1991 BASICODE-2 Dutch
The Best of BASICODE 7 Diskette 1992 Text only Dutch
BASICODE-3 Tape 1986 BASICODE-3 Dutch
BASICODE-3 Verzamelcassette 1 Tape 1987 BASICODE-3 Dutch
BASICODE-3 Verzamelcassette 2 Tape 1987 BASICODE-3 Dutch
BASICODE-3 Verzamelcassette 3 Tape 1988 BASICODE-3 Dutch
BASICODE-3 Verzamelcassette 4 Tape 1988 BASICODE-3 Dutch
BASICODE-3 Verzamelcassette 5 Tape 1989 BASICODE-3 Dutch
BASICODE-3 Verzamelcassette 6 Tape 1989 BASICODE-3 Dutch
BASICODE-3 Verzamelcassette 7 Tape 1990 BASICODE-3 Dutch and German
BASICODE-3 Verzamelcassette 8 Tape 1990 BASICODE-3 Dutch and German
BASICODE-3 Verzamelcassette 9 Tape 1990 BASICODE-3 Dutch and German
BasiCode Sammelsurium Diskette 1998 BASICODE-2, 3, 3C German
Software-Archiv des KC-Clubs Web 2002 BASICODE-2, 3, 3C German

Also included are a few BASICODE programs from various sources such as radio recordings.


A big thank you to Janny Looyenga, Jan Bredenbeek, André van der Leeden, Thomas Rademacher, Victor Reijs and many others for history, BASICODE recordings and background information!


  • Hans G. Janssen (ed.), BASICODE Hobbyscoop 2, Nederlandse Omroep Stichting, Hilversum, 1983.
  • Trevor Taylor (ed.), The Chip Shop BASICODE-2, Broadcasting Support Services, London, 1984.
  • Jacques Haubrich (ed.), Het BASICODE-3 Boek, Kluwer Technische Boeken, Deventer, 1986.
  • Michael Wiegand, Heike u. Manfred Fillinger, BASICODE. Mit Programmkassette, Ravensburger Buchverlag, Ravensburg, 1986.
  • 'basicode-2', Elektuur 10 1983.
  • Prof. Dr. Horst Völz, 'Datenaustausch mit BASICODE', Radio Fernsehen Elektronik 1 1990.
  • Frank Veraart, 'Basicode: Co-Producing a Microcomputer Esperanto', History of Technology 28 2008

Online resources