DUO
From Just Solve the File Format Problem
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== Identification == | == Identification == | ||
Files are exactly 113600 bytes long. | Files are exactly 113600 bytes long. | ||
| + | |||
| + | <pre> | ||
| + | DUO *.DU1 *.DUO (low resolution) | ||
| + | *.DU2 (medium resolution) | ||
| + | |||
| + | Created by Anders Eriksson: http://ae.dhs.nu/ | ||
| + | These are essentially 2 screens with over-scan interlaced together. | ||
| + | |||
| + | Low resolution files are 416x273 pixels: | ||
| + | |||
| + | 16 words palette | ||
| + | 56784 bytes screen 1 | ||
| + | 56784 bytes screen 2 | ||
| + | ----------- | ||
| + | 113600 bytes total | ||
| + | |||
| + | Medium resolution files are 832x273 pixels: | ||
| + | |||
| + | 4 words palette | ||
| + | 56784 bytes screen 1 | ||
| + | 56784 bytes screen 2 | ||
| + | 24 bytes padding if present, otherwise total size is 113576 bytes | ||
| + | ----------- | ||
| + | 113600 bytes total | ||
| + | |||
| + | Both screens use the same palette, but when viewed the human eye merges the two | ||
| + | alternating images into one. | ||
| + | </pre> | ||
== Software == | == Software == | ||
Revision as of 20:52, 10 August 2020
DU* is a set of similar graphics formats for the Atari computers with unknown origin.
Contents |
Identification
Files are exactly 113600 bytes long.
DUO *.DU1 *.DUO (low resolution)
*.DU2 (medium resolution)
Created by Anders Eriksson: http://ae.dhs.nu/
These are essentially 2 screens with over-scan interlaced together.
Low resolution files are 416x273 pixels:
16 words palette
56784 bytes screen 1
56784 bytes screen 2
-----------
113600 bytes total
Medium resolution files are 832x273 pixels:
4 words palette
56784 bytes screen 1
56784 bytes screen 2
24 bytes padding if present, otherwise total size is 113576 bytes
-----------
113600 bytes total
Both screens use the same palette, but when viewed the human eye merges the two
alternating images into one.
