TheDraw COM File
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It is in the form of a [[DOS executable (.com)|DOS .COM]] file that, when executed, prints the graphics to the screen. | It is in the form of a [[DOS executable (.com)|DOS .COM]] file that, when executed, prints the graphics to the screen. | ||
| + | |||
| + | == Format details == | ||
| + | There are three "types" of the format, distinguished by the byte at offset 6 having value 0, 1, or 2. | ||
| + | |||
| + | Types 1 and 2 were introduced in version 4.00. TheDraw selects the type to use automatically. Type 1 seems to be rare, and is used only if the image is incompressible. | ||
== Identification == | == Identification == | ||
| − | + | Type 0 files start with bytes {{magic|eb 3d 90}}, and have <code>00</code> at offset 6. | |
| + | |||
| + | Type 1 files start with bytes {{magic|eb 18 90}}, and have <code>01</code> at offset 6. | ||
| + | |||
| + | Type 2 files start with bytes {{magic|eb 3d 90}}, and have <code>02</code> at offset 6. | ||
| + | |||
| + | Types 0 and 2 have the signature string "{{magic|TheDraw COM file Screen Save}}" at offset 9, followed by byte <code>0x1a</code>. | ||
| + | |||
| + | Type 1 has the shorter string "{{magic|TheDraw COM file}}" at offset 9, followed by <code>0x1a</code>. | ||
| + | |||
| + | See also [[P-Screen COM Screen]], which looks a lot like type 0, except for the different signature string. | ||
| + | |||
| + | == Specifications == | ||
| + | * An overview of the decompression algorithm for type 2 is in the UNCRUNCH.PAS file included with TheDraw 4.x. | ||
== Software == | == Software == | ||
| − | * TheDraw - Refer to [[TheDraw Save File#Software]] (v3.20 | + | * TheDraw - Refer to [[TheDraw Save File#Software]] (v3.20 ) |
| + | * {{Deark}} | ||
| + | |||
| + | (Or just execute the file in a DOS environment.) | ||
== Sample files == | == Sample files == | ||
* {{CdTextfiles|pdos9606/GAMES/STRATEGY/TACT538.ZIP|TACT538.ZIP}} - Most of the .COM files | * {{CdTextfiles|pdos9606/GAMES/STRATEGY/TACT538.ZIP|TACT538.ZIP}} - Most of the .COM files | ||
| − | * | + | * {{DexvertSamples|image/theDrawCOM}} |
[[Category:Executable envelopes]] | [[Category:Executable envelopes]] | ||
Latest revision as of 02:56, 28 December 2023
TheDraw COM File is a format for ANSI Art-style character graphics, associated with the DOS software TheDraw. The format was introduced in TheDraw v3.20 (1989-04).
It is in the form of a DOS .COM file that, when executed, prints the graphics to the screen.
Contents |
[edit] Format details
There are three "types" of the format, distinguished by the byte at offset 6 having value 0, 1, or 2.
Types 1 and 2 were introduced in version 4.00. TheDraw selects the type to use automatically. Type 1 seems to be rare, and is used only if the image is incompressible.
[edit] Identification
Type 0 files start with bytes eb 3d 90, and have 00 at offset 6.
Type 1 files start with bytes eb 18 90, and have 01 at offset 6.
Type 2 files start with bytes eb 3d 90, and have 02 at offset 6.
Types 0 and 2 have the signature string "TheDraw COM file Screen Save" at offset 9, followed by byte 0x1a.
Type 1 has the shorter string "TheDraw COM file" at offset 9, followed by 0x1a.
See also P-Screen COM Screen, which looks a lot like type 0, except for the different signature string.
[edit] Specifications
- An overview of the decompression algorithm for type 2 is in the UNCRUNCH.PAS file included with TheDraw 4.x.
[edit] Software
- TheDraw - Refer to TheDraw Save File#Software (v3.20 )
- Deark
(Or just execute the file in a DOS environment.)
[edit] Sample files
- TACT538.ZIP - Most of the .COM files
- dexvert samples — image/theDrawCOM
