Iirc MS-DOS 5 and older was DEBUG.COM. Many shipped apps in MS-DOS 6 had became .EXE:s. One limit of a .COM is that it is one segment size (64 kilobytes) max

Iirc MS-DOS 5 and older was DEBUG.COM. Many shipped apps in MS-DOS 6 had became .EXE:s. One limit of a .COM is that it is one segment size (64 kilobytes) max file size.