Download latest version (unstable, slower than stable version)
16-bit Windows (Windows 1.x, 2.x, 3.0, 3.1, etc.) on 64-bit Windows
An altered version of winevdm (a 16-bit Windows emulator), ported to 64-bit Windows.
- Install Visual Studio 2017
- Install binutils
- Edit PropertySheet.props
- Compile
- Drag and drop Win16 executable file to otvdm.exe or execute otvdmw.exe.
- Download or compile
- Edit install.reg
- Register install.reg
- You can execute Win16 binaries directly!
If you install v0.4.x, you should add these to install.reg and register install.reg again.
[HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\NtVdm64\OTVDM]
"CommandLine"="\"%m\" %c"
"InternalName"="*"
"MappedExeName"="C:\\PATH\\TO\\otvdm.exe"
"ProductName"="*"
"ProductVersion"="*"
This program contains the following items
- CPU Emulator
- 64-bit Windows cannot modify LDT(NtSetInformationProcess(,ProcessLdtInformation,,) always returns error)
- wine based 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(word) DestroyWindow16
- DOS emulation for Win16
- 16-bit <=> native HANDLE conversion
- Fix compatibility problems, fix compatibility problems
When 64-bit Windows detects a 16-bit installer, it has a mechanism to start an alternative installer which is not 16-bit. This program uses it.
Some Win16 programs try to save their settings in %WINDIR%<filename>.ini
In recent Windows, it is not allowed to save to %WINDIR%, so it redirects.
winevdm.exe [--app-name app.exe] command line
winevdm.exe CALC.EXE
It can also run DOS executables (DOS emulator-like). You can set the DOS version with the VDMDOSVER environment variable.