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Top Document: comp.os.msdos.programmer FAQ part 3/5 Previous Document: Next Document: See reader questions & answers on this topic! - Help others by sharing your knowledge If the disk was formatted by DOS 4.0 or later, use INT 21: AX=6900 gets the serial number; AX=6901 sets it. (The disk serial number doesn't exist if the disk was formatted with an earlier version of DOS, or with some third-party formatters.) See Ralf Brown's interrupt list (<Q:02.03> [What and where is Ralf Brown's interrupt list?]), or PC Magazine July 1992 (xi:13) page 496, for details. INT 21 AH=69 also gets and sets the volume label in the boot record, which is not necessarily the same as "the" volume label displayed by the DIR, VOL, and LABEL commands. For that volume label, see <Q:05.12> [How can I read, create, change, or delete the volume label?] User Contributions: 1 Ben in Seattle ⚠ Jun 2, 2026 @ 4:16 pm Another solution is to use a parallel port loopback plug. It makes the PC think there is a printer attached. The benefit of this is it doesn't require anticipating the problem with ANSI.SYS escape sequences nor does it make you wait half an hour for the "Abort, Retry, Ignore?" prompt, as some versions of DOS do. Comment about this article, ask questions, or add new information about this topic:Top Document: comp.os.msdos.programmer FAQ part 3/5 Previous Document: Next Document: Part1 - Part2 - Part3 - Part4 - Part5 - Single Page [ Usenet FAQs | Web FAQs | Documents | RFC Index ] Send corrections/additions to the FAQ Maintainer: jeffrey@carlyle.org (Jeffrey Carlyle)
Last Update March 27 2014 @ 02:11 PM
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comp.os.msdos.programmer FAQ part 3/5
Section - - How can I get the disk serial number?
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comp.os.msdos.programmer FAQ part 3/5
Section - - How can I get the disk serial number?
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