Int 4B/AX=8105h

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Virtual DMA Specification - SCATTER/GATHER LOCK REGION

AX = 8105h
DX = flags (see #03224)
ES:DI -> Extended DMA descriptor structure (see #03222,#03223)
region size, linear segment, linear offset, and number avail
fields set

Return:
CF clear if successful EDDS number used field set if DX bit 6 set, lower 12 bits of BX = offset in first page CF set on error AL = error code (see #03218) EDDS region size field filled with max length in bytes that can be locked and described in the EDDS table

BUG: Windows 3.0 in enhanced mode may return zero instead of the physical page address for pages which were originally not present

See Also: AX=8103h - AX=8106h

Bitfields for VDS flags: Bit(s) Description (Table 03224) 0-5 reserved (zero) 6 EDDS should be returned with page table entries 7 only present pages should be locked (not-present pages receive entry of 0000h) 8-15 reserved (zero)

Category: Disk I/O Enhancements - Int 4Bh - V

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