1. In a data exchange system for transferring data between a host processor and a target processor comprising a data unit on said target processor that transfers said data from said target processor to an emulator and a device driver on said host processor that transfers data from said emulator, a system for dynamically linking and loading emulation software support for a new target processor comprising: a target interface module for the host computer that supports the new target processor kind; and a target interface module for the emulator that supports the new target processor kind.