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AX = E801h
Return:
CF clear if successful AX = extended memory between 1M and 16M, in K (max 3C00h = 15MB) BX = extended memory above 16M, in 64K blocks CX = configured memory 1M to 16M, in K DX = configured memory above 16M, in 64K blocks CF set on error
Notes: Supported by the A03 level (6/14/94) and later XPS P90 BIOSes, as well as the Compaq Contura, 3/8/93 DESKPRO/i, and 7/26/93 LTE Lite 386 ROM BIOS. Supported by AMI BIOSes dated 8/23/94 or later. On some systems, the BIOS returns AX=BX=0000h; in this case, use CX and DX instead of AX and BX. This interface is used by Windows NT 3.1, OS/2 v2.11/2.20, and is used as a fall-back by newer versions if AX=E820h is not supported. This function is not used by MS-DOS 6.0 HIMEM.SYS when an EISA machine (for example with parameter /EISA) (see also MEM F000h:FFD9h), or no Compaq machine was detected, or parameter /NOABOVE16 was given.
See Also:
AH=8Ah"Phoenix" - AX=E802h - AX=E820h - AX=E881
Category:
Vendor-specific BIOS Extensions
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Int 15h
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P
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