DelphiX is a small library for programming in Delphi with DirectX. It was created by Mr. Hiroyuki Hori in Japan. The library was revised to JEDI official DirectX headers and was named UnDelphiX. See gameDev unDelphiX
In 2004 library was revised (new compilation DirextX.pas headers) and hardware acceleration was added. Old code can be recompiled with minor changes, but with improved performance.
The new home for the library is here. The latest version is 22.214.171.124. The package contains full library source, DirectX headers and many examples.