Download i8086 MS-DOS
The latest release version is 3.0.2.
Download native compiler
There is no native compiler available for i8086 MS-DOS. You have to use a cross-compiler.
Download cross-compilers running on another host
These cross-compilers run on another host and need the corresponding native compiler as a prerequisite.
fpc-3.0.2.i386-win32.cross.i8086-msdos.exe (21.7 MB)
Contains the installer with the win32 to MS-DOS (real mode, i8086) cross-compiler. It needs the native Win32 compiler (31.4 MB) to be able to work.
fpc-3.0.2.i386-linux.cross.i8086-msdos.tar.xz (21.2 MB)
Contains a tar file with the Linux/i386 to MS-DOS (real mode, i8086) cross-compiler. It needs the native Linux/i386 compiler (42.8 MB) to be able to work. You can install it like the native compiler.