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What does BDS mean? - Block Data Structure (Miscellaneous)

posted by ecm Homepage E-mail, Düsseldorf, Germany, 27.12.2024, 14:51

> The BDS is a data structure in the MS-DOS v4 BIO module:
>
> https://hg.pushbx.org/ecm/msdos4/file/abb3b0dfe997/src/INC/MSBDS.INC#l94
>
> https://hg.pushbx.org/ecm/msdos4/file/abb3b0dfe997/src/BIOS/MSDISK.ASM
>
> https://hg.pushbx.org/ecm/msdos4/file/abb3b0dfe997/src/BIOS/MSINIT.ASM
>
> In the msbds.inc file there is also mention of the "BDSM" which is "BDS
> structure for mini disk", where mini disk means extended or logical
> partitions on an MBR-partitioned disk.
>
> The same structure is called Drive Data Table
> in the
> Interrupt List and
> in
> the FreeDOS kernel. DR-DOS calls it
> the
> UDSC (Unit Descriptor), see also
> this thread. I call
> it the UPB (Unit Parameter Block).
>
> I haven't found any reference to what BDS stands for yet. My guesses would
> be "Basic Disk Structure" or "BIO Disk Structure" but there is no instance
> of these spelled out in the source tree if that's indeed what BDS stands
> for.

Apparently BDS stands for Block Data Structure.

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l

 

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