NAS - Revision history

Jsummers at 20:06, 27 June 2023

2023-06-27T20:06:18Z

Foxtrot at 22:27, 26 November 2022

2022-11-26T22:27:14Z

Foxtrot at 22:26, 26 November 2022

2022-11-26T22:26:04Z

Foxtrot at 22:25, 26 November 2022

2022-11-26T22:25:54Z

Foxtrot at 22:25, 26 November 2022

2022-11-26T22:25:28Z

Foxtrot: Created page with "{{FormatInfo |formattype=electronic |subcat=Graphics |extensions={{ext|nas}} }} A '''.NAS''' file is a compressed paletted image archive format. The format appears to be prop..."

2022-11-26T22:24:25Z

Created page with "{{FormatInfo |formattype=electronic |subcat=Graphics |extensions={{ext|nas}} }} A '''.NAS''' file is a compressed paletted image archive format. The format appears to be prop..."

New page

{{FormatInfo
|formattype=electronic
|subcat=Graphics
|extensions={{ext|nas}}
}}

A '''.NAS''' file is a compressed paletted image archive format. The format appears to be proprietary and specific to the ''Bunny Pro. Das2'' visual novel software for Windows.

== Specification ==

* This format has the signature <code>4E 41 00 00</code>
* Payload-size (''int'')
* A fixed-size palette of 256 entries totalling 768 bytes. Each entry is a 3-byte tuple for the red, blue and green component. (Most images do not use all 256 entries but the palette is always 768 bytes)
* A series of chunks, either starting with the bytes <code>AD</code> or <code>NB</code>. Most images only have a single <code>NB</code> chunk.

=== NB chunk ===

The **NB** chunk contains image data and has the following format:

- Signature (<code>ND</code>)
- Image width (''short'')
- Image height (''short'')
- `unknown1` (''short'') — usually 0 or 1
- `unknown2` (''short'') — always 0
- `unknown3` (''short'') — always 1
- Length of data (''int'')
- Image data

The image data is compressed and the method is unknown.

=== AD chunk ===
The format of this chunk is unknown:

* Signature (<code>AD</code>)
* Data (362 bytes)

@@ Line 6: / Line 6: @@
 A '''.NAS''' file is a compressed paletted image archive format. The format appears to be proprietary and specific to the ''Bunny Pro. Das2'' visual novel software for Windows.
 == Specification ==
@@ Line 37: / Line 39: @@
 == Sample files ==
-* {{DiscMasterURL|/view/6808/Corsage%20-%20Disc%201.iso/nas.dpk/title1.nas}}
+* [https://archive.org/details/Corsage_1653931983498 Corsage] → ...Disc 1.iso → NAS.DPK ([[DPK]] format) → *.NAS

← Older revision		Revision as of 22:27, 26 November 2022
Line 35:		Line 35:
	* Signature (<code>AD</code>)		* Signature (<code>AD</code>)
	* Data (362 bytes)		* Data (362 bytes)
		+
		+	== Sample files ==
		+	* {{DiscMasterURL\|/view/6808/Corsage%20-%20Disc%201.iso/nas.dpk/title1.nas}}

@@ Line 18: / Line 18: @@
 The '''NB''' chunk contains image data and has the following format:
-* Signature (<code>ND</code>)
+* Signature (<code>NB</code>)
 * Image width (''short'')
 * Image height (''short'')

@@ Line 16: / Line 16: @@
 === NB chunk ===
-The **NB** chunk contains image data and has the following format:
+The '''NB''' chunk contains image data and has the following format:
 * Signature (<code>ND</code>)
@@ Line 30: / Line 30: @@
 === AD chunk ===
 The format of this chunk is unknown:
 * Signature (<code>AD</code>)
 * Data (362 bytes)

@@ Line 18: / Line 18: @@
 The **NB** chunk contains image data and has the following format:
-- Signature (<code>ND</code>)
+* Signature (<code>ND</code>)
-- Image width (''short'')
+* Image width (''short'')
-- Image height (''short'')
+* Image height (''short'')
-- `unknown1` (''short'') — usually 0 or 1
+* ''Unknown 1'' (''short'') — usually 0 or 1
-- `unknown2` (''short'') — always 0
+* ''Unknown 2'' (''short'') — always 0
-- `unknown3` (''short'') — always 1
+* ''Unknown 3'' (''short'') — always 1
-- Length of data (''int'')
+* Length of data (''int'')
-- Image data
+* Image data
 The image data is compressed and the method is unknown.