OTLink is a link-edit software for DOS, more or less equivalent to Microsoft Object Linker (LINK).

It can link object files into an MZ executable file.
For more information about the structures of the ".obj" files and the ".exe" file, read The MS-DOS Encyclopedia, Microsoft Press, 1988.

OTLink is free.

Here are the source files, written in C:

Source file	Short description
OTLink.h	Definition of constants and structures.
OTLink.c	Parsing the command line.
OTLink1.c	Extracting symbols from object files.
OTLink2.c	Low level I/O routines.
OTLink3.c	Managing a hash table of symbols.
OTLink4.c	First pass for linnum, fixup, lidata, ledata, comdef, extdef, pubdef, typdef, grpdef, segdef, modend, lnames.
OTLink5.c	Second pass for fixup, lidata, ledata.

These files have been compiled with Borland C 3.1. to generate OTLink.exe (50 KB).