CompuServe RLE

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'''CompuServe RLE''' is a bi-level image format that was used by the [[CompuServe]] on-line service. In some ways, it is the predecessor of [[GIF]].
 
'''CompuServe RLE''' is a bi-level image format that was used by the [[CompuServe]] on-line service. In some ways, it is the predecessor of [[GIF]].
  
The image dimensions are either 128×96 or 256×192. Images are [[Run-length encoding|RLE-compressed]].
+
The image dimensions are 256×192 or (rarely?) 128×96. Images are [[Run-length encoding|RLE-compressed]].
  
 
Files consist entirely of [[ASCII]] characters, though some are [[C0 controls|control characters]].
 
Files consist entirely of [[ASCII]] characters, though some are [[C0 controls|control characters]].
  
 
== Identification ==
 
== Identification ==
Files begin with bytes <code>0x1B 0x47 0x4D</code> (128×96) or <code>0x1B 0x47 0x48</code> (256×192).
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Files begin with bytes {{magic|0x1B 0x47 0x48}} (256×192) or {{magic|0x1B 0x47 0x4D}} (128×96).
  
 
== Software ==
 
== Software ==
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* [[Tom's Editor]]
 
* [[Tom's Editor]]
 
* {{Deark}}
 
* {{Deark}}
 +
* {{CdTextfiles|simtel/stmsdos9709/disk1/DISC1/GRAPHICS/2SHOW204.ZIP|CompuShow 2000! v2.04a}} (DOS software)
  
 
== Sample files ==
 
== Sample files ==
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== Resources ==
 
== Resources ==
* [http://staticweb.rasip.fer.hr/research/compress/algorithms_run-length_coding.htm#examples CompuServe standard for RLE file format]
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* [http://staticweb.rasip.fer.hr/research/compress/algorithms_run-length_coding.htm#examples CompuServe standard for RLE file format] ([https://web.archive.org/web/20140721001738/http://staticweb.rasip.fer.hr/research/compress/algorithms_run-length_coding.htm#examples archived])

Latest revision as of 22:32, 28 April 2022

File Format
Name CompuServe RLE
Ontology
Extension(s) .rle

CompuServe RLE is a bi-level image format that was used by the CompuServe on-line service. In some ways, it is the predecessor of GIF.

The image dimensions are 256×192 or (rarely?) 128×96. Images are RLE-compressed.

Files consist entirely of ASCII characters, though some are control characters.

Contents

[edit] Identification

Files begin with bytes 0x1B 0x47 0x48 (256×192) or 0x1B 0x47 0x4D (128×96).

[edit] Software

[edit] Sample files

[edit] Resources

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