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AX = 1607h BX = virtual device ID (see #02642) CX = (usually) callout subfunction
Return:
(usually) AX,BX,CX,DX,ES contain results
Notes: More of a convention than an API, this call specifies a standard mechanism for Windows enhanced-mode virtual devices (VxD's) to talk to DOS device drivers and TSRs. See below for details on several virtual devices
See Also: AX=1607h/BX=0018h - AX=1684h"DEVICE API" - AX=C020h
Category: Windows - Int 2Fh - M
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