Category: <b>DOS extenders</b>
<br>Flags: available only in protected mode<p>
<pre><b>INT 21 - FlashTek X-32VM - GET SYSTEM SEGMENTS AND SELECTORS</b>

	AX = 2509h
Return: CF clear
	EAX high word = default DS
	AX = alias for 16-bit data segment
	BX = real mode code segment
	EDX high word = selector covering full 4GB address space
	DX = default SS
	ESI high word = PSP selector
	SI = environment selector
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