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AX = BF02h DX = 0000h
Return:
DX = nonzero if installed DX:SI -> XBRK structure (see #00508)
Note: This function is also supported by DOS/4G
See Also: AX=BF01h - AX=BFDCh - AX=BFDEh/BX=0000h
See Also: INT 21/AH=FFh/DH=0Eh - INT 2F/AH=A1h - INT 2F/AX=F100h
Format of DOS/16M XBRK structure: Offset Size Description (Table 00508) 00h DWORD linear address of first available byte 04h DWORD linear address of last available byte + 1 ??? 08h DWORD real-mode address of XBRK structure??? 0Ch DWORD ??? 10h 2 BYTEs ??? 12h WORD segment of ??? 14h 8 BYTEs ??? 1Ch 512 BYTEs protected-mode IDT 21Ch N BYTEs protected-mode GDT
Category: DOS Extenders - Int 15h - R
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