D3TV
(→GRPH) |
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| 0x04 || Chunk size (always <code>9C</code>) || 4 | | 0x04 || Chunk size (always <code>9C</code>) || 4 | ||
|- | |- | ||
| − | | 0x08 || Graphic path || unknown | + | | 0x08 || Graphic path (null-terminated string) || unknown |
|- | |- | ||
| + | | 0x8E || Frames || 2 | ||
|} | |} | ||
Revision as of 05:21, 17 October 2020
D3TV files are game data files used by the v3.x of the D.U.N.E (Developers Universal Non-programming Environment) Engine, which added support for CD Audio with the Commodore CDTV. These files usually correspond to individual "shots" in a DUNE game, and are based on the IFF metaformat.
Contents |
Identification
D3TV files begin with FORM, have the file-size in bytes starting at offset 4, and have a type indicator of D3TV at offset 8.
Chunks
These files contain many different chunks for different types of game data. All offsets mentioned are relative to the start of the chunk identifier.
AFRM
The purpose of this chunk is currently unknown.
AVNE
This chunk contains information about "avenues", which are links to other shots.
| Offset | Data | Size (in bytes) |
|---|---|---|
| 0x00 | Chunk identifier (AVNE) |
4 |
| 0x04 | Chunk size (always 30) |
4 |
| 0x08 | Shot path | unknown |
BPNT
This chunk contains information about where a button is, and is followed by the connected AVNE chunk. Point fields are repeated for each point in the button.
| Offset | Data | Size (in bytes) |
|---|---|---|
| 0x00 | Chunk identifier (BPNT) |
4 |
| 0x04 | Chunk size (minimum of 0C, goes up by 4 for each point) |
4 |
| 0x08 | Point X | 2 |
| 0x0A | Point Y | 2 |
CAUD
This chunk sets the audio sample or module to be played when entering a shot, or when activating a button.
| Offset | Data | Size (in bytes) |
|---|---|---|
| 0x00 | Chunk identifier (CAUD) |
4 |
| 0x04 | Chunk size (always 30) |
4 |
| 0x08 | Audio path | unknown |
CDTV
This chunk refers to CD Audio that is played immediately when a shot is entered.
| Offset | Data | Size (in bytes) |
|---|---|---|
| 0x00 | Chunk identifier (CDTV) |
4 |
| 0x04 | Chunk size (always 1C) |
4 |
| 0x09 | CD Track | 1 |
| 0x0D | Start point minutes | 1 |
| 0x0E | Start point seconds | 1 |
| 0x0F | Start point CDDA frames | 1 |
| 0x11 | End point minutes | 1 |
| 0x12 | End point seconds | 1 |
| 0x13 | End point CDDA frames | 1 |
EVNT
This chunk seems to related an avenue to either a button press or time elapsing. Usually followed by an AVNE and sometimes a BPNT.
| Offset | Data | Size (in bytes) |
|---|---|---|
| 0x00 | Chunk identifier (EVNT) |
4 |
| 0x04 | Chunk size (always 2C) |
4 |
| 0x15 | Timer length (?) | 1 |
GRPH
This chunk gets the image or animation for the shot, and sets some extra details about it.
| Offset | Data | Size (in bytes) |
|---|---|---|
| 0x00 | Chunk identifier (GRPH) |
4 |
| 0x04 | Chunk size (always 9C) |
4 |
| 0x08 | Graphic path (null-terminated string) | unknown |
| 0x8E | Frames | 2 |
