Int 31H Function 0003H

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Int 31H Function 0003H

Get Selector Increment Value

The DPMI functions Allocate LDT Descriptors (Int 31H Function 0000H) and Allocate DOS Memory Block (Int 31H Function 0100H) can allocate an array of contiguous descriptors, but only return a selector for the first descriptor. The value returned by this function can be used to calculate the selectors for subsequent descriptors in the array.

Call With

AX = 0003H

Returns

Carry flag = clear (this function always succeeds)
AX = selector increment value

Notes

The increment value is always a power of two.

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