PSB PSD 8BIM 8B64

[jmagyari]

I noticed in CS4 that when saving same png file to PSB and PSD that

SDK File Format Spec CS4 indicates Signature: '8BIM'

But I see 8B64 in PSB file and 8BIM in PSD file.

1) Is this documented somewhere?

2) In PSD file after 3 different occurances of 8BIM I see

hex

41 63 44 73

52 6F 6C 6C

46 4D 73 6B

1) Are these values documented somewhere, other values are documented?

[Tom Ruark]

Which version of Photoshop wrote that file? Can you copy/paste your system info?

Attached July 2010 version.

See also:

http://forums.adobe.com/message/3265830, psd and psb File Format Specifications
http://forums.adobe.com/thread/608710, PSD File specs
http://forums.adobe.com/thread/678624, Not getting the file spec
http://forums.adobe.com/thread/663651, Photoshop file formats pdf