Ascertaining UDF and ISO CD time zone?

From: Mark G. Spencer <dreadnought(at)arsenal.net>
Date: Tue Dec 10 2002 - 09:37:10 EST

My coworker who is putting together the tutorial on UDF and ISO CD-ROM dating has run into a couple more problems and I was hoping those on the list more familiar with these specifications could assist him.

Regarding UDF, he's working with the date and time stamp C4 0F D2 07 0A 01 0A 2E 0C. He's been able to compute and test all values against test burns except the 16-bit time zone and type value of 0xC4 0x0F. How does this translate into time zone and type?

Regarding ISO, he has found an inconsistency computing the time zone (calculated using the offset from GMT in the number of 15 minute intervals from -48 to +52) of hex 0xE4. His logic at this point:

-0xE4 = -228
Dropped hundredths, resulting in -28 15 minute intervals, 4 intervals/hr. -28 / 4 = -7

But according to the Windows date and time properties on the test system, the time zone value should be -8!

Thanks again for the excellent advice,

Mark

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This list is provided by the SecurityFocus ARIS analyzer service. For more information on this free incident handling, management and tracking system please see: http://aris.securityfocus.com Received on Wed Dec 11 19:04:42 2002