Int 31H Function 0200H

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Int 31H Function 0200H

Get Real Mode Interrupt Vector

Returns the contents of the current virtual machine's real mode interrupt vector for the specified interrupt.

Call With

AX = 0200H
BL = interrupt number

Returns

Carry flag = clear (this function always succeeds)
CX:DX = segment:offset of real mode interrupt handler

The value returned in CX is a real mode segment address, not a selector. Attempts to place this value into a segment register in protected mode may cause a general protection (GP) fault.
All 100H (256) real mode interrupt vectors must be made available through this function by the DPMI host.

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