otya128/winevdm: 16-bit Windows (Windows 1.x, 2.x, 3.0, 3.1, and many others.) on 64-bit Windows · GitHub

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16-bit Windows (Windows 1.x, 2.x, 3.0, 3.1, and many others.) on 64-bit Windows

An altered model of winevdm (a 16-bit Windows emulator), ported to 64-bit Windows.

• Download or compile
• Run “set up” shortcut or right-click on set up.inf and choose “Install”
• You can execute Win16 binaries straight!

If the registry is initialized by Windows Update, carry out the above process once more.

You can uninstall it by working uninstall.reg.

See otvdm.ini.

• Install Visual Studio 2017
• Edit PropertySheet.props
• Compile

git clone https://github.com/otya128/winevdm.git
cd winevdm
mkdir construct
cd construct
cmake ..
make

This program accommodates the next objects

• CPU Emulator
  • 64-bit Windows can’t modify LDT(NtSetInformationProcess(,ProcessLdtInformation,,) all the time returns error)
• wine based mostly Win16->Win32 conversion codes:

  BOOL16 WINAPI DestroyWindow16( HWND16 hwnd )
  {
      return DestroyWindow( WIN_Handle32(hwnd) );
  }

  Relay routines from 16-bit to 32-bit are autogenerated by convspec

  53  pascal -ret16 DestroyWindow(phrase) DestroyWindow16

• DOS emulation for Win16
• 16-bit <=> native HANDLE conversion
• Fix compatibility issues, repair compatibility issues

When 64-bit Windows detects a 16-bit installer, it has a mechanism to begin an alternate installer which isn’t 16-bit.
This program makes use of it.

Some Win16 packages attempt to save their settings in %WINDIR%.ini

In current Windows, it isn’t allowed to save lots of to %WINDIR%, so it redirects.

winevdm.exe [--app-name app.exe] command line
winevdm.exe CALC.EXE

It may run DOS executables (DOS emulator-like).
You can set the DOS model with the VDMDOSVER atmosphere variable.

DOS emulation is incomplete and it is suggested to make use of DOSBox or MS-DOS Player.