From https://en.m.wikipedia.org/wiki/COM_file https://en.m.wikipedia.org/wiki/COM_file > Since it lacks relocation information, it is loaded by the operating s

From https://en.m.wikipedia.org/wiki/COM_file https://en.m.wikipedia.org/wiki/COM_file > Since it lacks relocation information, it is loaded by the operating system at a pre-set address, at offset 0100h immediately following the PSP, where it is executed (hence the limitation of the executable's size): the entry point is fixed at 0100h.