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16 lines
613 B
16 lines
613 B
Design Notes for 1.4 -
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12/25/2011 DWG - Logical Unit enhancement for block drivers
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The previous version implemented Logical Unit functionality
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by poking an offset word into a private data structure in
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PPIDE_DATA.ASM.
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In order to make the Logical Unit functionality more generic,
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Wayne suggested adding the appropriate data items to the end
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of the Disk Parameter Header data structure (because there is
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one each for each drive).
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The added items consist of a Logical Unit enhancement signature
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which is two bytes "LU", and several subsequent items including
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a default slice number and status.
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