Summary
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| Name |
Spectrum 512 Uncompressed | Spectrum 512 Uncompressed Enhanced |
| Version |
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| Other names |
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| Identifiers |
PUID:
fmt/1576
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| Family |
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| Classification |
Image (Raster) |
| Disclosure |
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| Description |
Spectrum 512 was a computer paint program by Boris Tsikanovsky that enabled the creation of images with more than 16 simultaneous colors. It uses the Atari ST's rapid palette switching ability to expand the maximum number of colors to be displayed on-screen at once to 512 (up to 46 in each scan line). Spectrum 512 is a predecessor of Unispec.
This specific file format record details Spectrum 512 uncompressed formats. There are two varieties of uncompression in Spectrum 512 formats, first is Spectrum 512 Uncompressed and second Spectrum 512 Uncompressed Enhanced. Both of these formats have an unidentifiable file format signiture (magic bytes) and have the same extension. In the uncompressed files, the first 160 bytes are usually set to zero (except in the "Enhanced" variant). Following that are 31840 bytes of image data (160 for each row). Following that are 19104 bytes of palette data. The total file size is 51104 bytes. The Spectrum 512 Uncompressed Enhanced format extends the palette further, to 5 bits per color channel. |
| Orientation |
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| Byte order |
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| Related file formats |
Has priority over MPEG 1/2 Audio Layer 3
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| Technical Environment |
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| Released |
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| Supported until |
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| Format Risk |
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| Developed by |
None.
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| Supported by |
None.
|
| Source |
 The National Archives and Records Administration / The National Archives and Records Administration
|
| Source date |
04 Jan 2022 |
| Source description |
|
| Last updated |
04 Jan 2022 |
| Note |
https://doudoroff.com/atari/spectrum.html
https://temlib.org/AtariForumWiki/index.php/Spectrum_512_file_format
https://temlib.org/AtariForumWiki/index.php/Spectrum_512_Enhanced_file_format
https://en.wikipedia.org/wiki/Atari_ST
http://www.atarimania.com/utility-atari-st-spectrum-512_22312.html
http://fileformats.archiveteam.org/wiki/Spectrum_512_formats |
Details: File format summary
: detailed report on file format 
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