ClusterMaster operates correctly in the TWO WINDOWS mode (see sect. 9.1. of file C_READ.ME) only if your TNC implements the HEADERLN and MFILTER command according to the original TAPR spec. This last command is not available with Kantronics KAM and AEA PK-88, and is not properly implemented in the L.L. Grace DSP-12; therefore owners of these TNCs are adviced to use the ONE WINDOW mode. To operate the TNC with ClusterMaster (see sect. 9.5 of file C_READ.ME) and at the same time control your rig (with RigMate, RigMaster or ICOMtrol), two serial ports capable of simultaneous operation are required. Please consult the RigMaster K_EXPLA.TXT file for hints on serial ports usage and IRQ allocations in the Windows environment.
