Int 2F/AX=1607h

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MS Windows - VIRTUAL DEVICE CALL OUT API

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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