FreePascal does win64 and pretty much every other platform from the last 30-40 years as well. I think you can still use it for win32 and win16 if you want to. I

FreePascal does win64 and pretty much every other platform from the last 30-40 years as well. I think you can still use it for win32 and win16 if you want to. I used it to cross-compile to 16-bit DOS and 32-bit DOS, and also various 32-bit and 64-bit ARM targets as well as 64-bit intel Windows, Linux, and FreeBSD. Seems to work everywhere.