If you plan to use DRSI-card with this software, you must make some changes. Before you start FBB, you must load the DRSI-driver that comes with the DRSI- card. This must be TNCTSR-R or TNCTSR-L with a version-number higher or equal to 2.1. The first DRSI-card (MultCh 0 and 1) must be at address 300. The second DRSI-card (MultCh 2 and 3) must be at address 310. The third DRSI-card (MultCh 4 and 5) must be at address 308. The fourth DRSI-card (MultCh 6 and 7) must be at address 318. Before installing cards in the PC, use the program CHKADDR to verify that the addresses corresponding to the cards have a value of FF. If there is a problem, check your configuration to find what peripheral is already using this address. Install just one card at the time, and verify each cards presence with CHKADDR. When all cards are ok, configure the driver by means of the TAILORnn program (depending of the version). TNCTSR-S will be ok if you use only a few channels, while TNCTSR-L should be used for big configurations, up to 32 channels. One problem: What DRSI calls DRSI-PORT, is what we call MultCh in FBB ! What DRSI calls PORT, is what FBB calls port or TNC ! We always use FBB-names here... Each DRSI-card works like 2 radio-ports. The first DRSI-card is always MultCh 0 and 1, and the forth card is MultCh 6 and 7. If one radio-port is used on HF, that port must be the second port on the card. All the DRSI-cards together, work like only one COM. And this COM-port does not need to exist in the PC. You may call that port COM 7 or COM 8 and keep free the already existing COMS. Baud-rate does not matter, but should be set to a standard value, to avoid error-messages. Here is an example of PORT.SYS with 2 DRSI-cards (4 radios) : # #Ports TNCs 1 4 # # #Com Interface Address (Hex) Baud 7 4 0 4800 # # #TNC NbCh Com MultCh Pacl Maxfr NbFwd MxBloc M/P-Fwd Mode Freq 1 8 7 0 230 4 1 10 30/60 UDYW 433.650 2 1 7 1 80 2 1 5 12/30 GDW 15/20m 3 8 7 2 230 4 1 10 36/60 UDYW 433.650 4 8 7 3 230 4 1 5 10/30 GDW 145.300 # If you are using DRSI-card, you also must change the INITTNC1.SYS. You will need only ONE file for all the ports. Example of INITTNC1.SYS that initializes 4 ports: MUIS U0 p0 1 64 10 4 4 10 100 18000 30 2 0 p1 1 64 10 4 1 16 100 18000 30 1 0 p2 1 64 10 4 4 10 100 18000 30 2 0 p3 1 64 10 4 4 10 100 18000 30 2 0 The same goes for MAINT1.SYS, only 1 file is needed for all 4 ports, like this: Y 1 U 1 BBS ($c) was shut down for service $d $T. In FORWARD.SYS there is no changes. Use standard syntax.