INT 2fH 16xxH: Enh386 Windows Services & Notifications
Compatibility: Win 3.0+
See: 1600H (srvc: is enh386 windows installed?)
1602H (srvc: get enh386 windows entry-point address)
1605H (ntfy: windows is about to startup)
1606H (ntfy: windows is about to terminate)
1607H (ntfy: device call out)
1608H (ntfy: windows initialization is finished)
1609H (ntfy: windows is terminating)
1680H (srvc: release time-slice)
1681H (srvc: begin critical section)
1682H (srvc: end critical section)
1683H (srvc: get current VM ID)
1684H (srvc: get VxD device API entry-point address)
1685H (srvc: switch VMs and callback)
1686H (srvc: detect INT 31h DPMI services)
Notes: ■ These functions relate to Enhanced-Mode Windows. They are
fully-documented in the Windows Device Driver Kit (DDK) since
they are usually used as means for a DOS-level device driver to
communicate with Windows and Windows device drivers.
■ The services are tools that can be called by utilities, TSRs,
and device drivers to access services provided by Windows.
■ The notifications represent INT 2fH fns that are invoked by
Windows. To receive these notifications, you are expected to
chain into INT 2fH and watch for AX=16xxH.
See Also: INT 2fH: Multiplex Interrupt
DPMI Services
DOS Functions
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