NAPLPS
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|formattype=electronic | |formattype=electronic | ||
|subcat=Graphics | |subcat=Graphics | ||
| + | |extensions={{ext|nap}}, others | ||
| + | |mimetypes={{mimetype|image/naplps}} | ||
| + | |pronom={{PRONOM|x-fmt/163}} | ||
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| − | '''NAPLPS''' (North American Presentation Level Protocol Syntax) is a system for expressing graphics in terms of character-based commands which was developed beginning in the 1970s for use in videotex / teletext systems, and was used as late as the 1990s in the Prodigy service and on some bulletin board systems. It can be used with 7-bit [[ASCII]] (characters #0-#127 decimal), but "extended" versions also exist which define meanings for 8-bit characters outside the 7-bit range (#128-#255 decimal). It uses a variety of characters with both standard ASCII meanings and specific NAPLPS meanings, as well as multi-character escape sequences, for defining various text and graphical screen layouts in a manner that is platform-independent and capable of efficient transmission (e.g., via telephone modem, or between the frames of TV broadcast signals). | + | '''NAPLPS''' (North American Presentation Level Protocol Syntax) is a system for expressing graphics in terms of character-based commands which was developed beginning in the 1970s for use in videotex / teletext systems, and was used as late as the 1990s in the [[Prodigy]] service and on some bulletin board systems. It can be used with 7-bit [[ASCII]] (characters #0-#127 decimal), but "extended" versions also exist which define meanings for 8-bit characters outside the 7-bit range (#128-#255 decimal). It uses a variety of characters with both standard ASCII meanings and specific NAPLPS meanings, as well as multi-character escape sequences, for defining various text and graphical screen layouts in a manner that is platform-independent and capable of efficient transmission (e.g., via telephone modem, or between the frames of TV broadcast signals). |
| − | == | + | == Specifications == |
| − | + | ||
* [http://www.martinreddy.net/gfx/2d/NAP.txt Format description (unofficial)] | * [http://www.martinreddy.net/gfx/2d/NAP.txt Format description (unofficial)] | ||
* [http://www.textfiles.com/programming/FORMATS/naplps.asc Another copy of format description] | * [http://www.textfiles.com/programming/FORMATS/naplps.asc Another copy of format description] | ||
| + | |||
| + | == Software == | ||
| + | * [http://cd.textfiles.com/simtel/simtel20/MSDOS/NAPLPS/.index.html Simtel MS-DOS archive: NAPLPS] | ||
| + | * [https://github.com/n1ckfg/Telidon Telidon - JS Based NAPLPS Decoder/Viewer] | ||
| + | |||
| + | == Sample files == | ||
| + | * [http://cd.textfiles.com/simtel/simtel20/MSDOS/NAPLPS/NALPANML.ZIP NALPANML.ZIP] | ||
| + | * [http://cd.textfiles.com/simtel/simtel20/MSDOS/NAPLPS/NAPFNTA.ZIP NAPFNTA.ZIP] | ||
| + | * [http://cd.textfiles.com/simtel/simtel20/MSDOS/NAPLPS/NAPLPS.ZIP NAPLPS.ZIP] → *.NAP | ||
| + | * {{DexvertSamples|image/naplps}} | ||
| + | |||
| + | == Links == | ||
| + | * [[Wikipedia:NAPLPS|Wikipedia article]] | ||
| + | * {{EGFF|naplps|NAPLPS File Format Summary}}, from the [[Encyclopedia of Graphics File Formats]] | ||
* [http://www.ic.gc.ca/eic/site/smt-gst.nsf/vwapj/bs14.pdf/$FILE/bs14.pdf Television Broadcast Videotex (from Canada)] | * [http://www.ic.gc.ca/eic/site/smt-gst.nsf/vwapj/bs14.pdf/$FILE/bs14.pdf Television Broadcast Videotex (from Canada)] | ||
| + | * [http://www.transdiffusion.org/2016/01/07/teletext-time-travel Teletext Time Travel] | ||
Latest revision as of 02:56, 28 December 2023
NAPLPS (North American Presentation Level Protocol Syntax) is a system for expressing graphics in terms of character-based commands which was developed beginning in the 1970s for use in videotex / teletext systems, and was used as late as the 1990s in the Prodigy service and on some bulletin board systems. It can be used with 7-bit ASCII (characters #0-#127 decimal), but "extended" versions also exist which define meanings for 8-bit characters outside the 7-bit range (#128-#255 decimal). It uses a variety of characters with both standard ASCII meanings and specific NAPLPS meanings, as well as multi-character escape sequences, for defining various text and graphical screen layouts in a manner that is platform-independent and capable of efficient transmission (e.g., via telephone modem, or between the frames of TV broadcast signals).
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