This file is intended to explain what the files: AR5:CPM;MTN21 OFFCOM AR5:CPM;MTN21 OFFHEX AR5:CPM;TRSURT ASM are. The first file is the COM file of MTN21 offset to load at 4300H. The second is the HEX of the first. The offset program is intended to run on the TRS80 Model I. Note that AR1:CPM;MTNMSG OVR will work fine with the offset version, be sure and rename it to MTNMSGS.OVR on you system. The third file in the list is an initiation program which does a master reset of the TRS80 UART, sets the baud rate and sets the control port. Related files you should be aware of are: AR0:CPM;MTN INFO AR0:CPM;MTN22A DOC AR0:CPM;TRSMDM EQUS