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Format of Virtual Device Reference Data

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Offset Size Description

00h

DWORD

physical address of ??? or 00000000h

04h

DWORD

physical address of ??? table

08h

DWORD

"DEST_PAGE" address to which pages must be mapped

0Ch

N DWORDs

"SRC_PAGE" physical addresses of the pages
00000000h = end of table

Note:

EMM386.EXE sets the first pointer to the start of the device driver chain, the second pointer to a field of 40h bytes followed by a 16-bit offset to the end of the SRC_PAGE table, and DEST_PAGE to the start segment of the UMB area.

See Also:

#02631