CompuServe Messages

Kelly – careful, you have my PPN wrong! Take note of the one in this message, and use it in the future, ok? DB0-DB5 go to DB0-DB5 on the PARALLEL PORT – this is NOT in ANY way connected to the Amiga's internal circuitry. -BR goes to DB6 on the PARALLEL port, and -BA goes to DB7 on the PARALLEL port. THe whole thing is interfaced to the Amiga thru the parallel port! The mode bus, for the purposes of this particular project (Which is 8 second sstv, b&w only) does not need to be used. If you DO elect to use it, what it does is tell the outside world what MODE the terminal unit (which is what you are building) is in. THis is so that pre-selctor filters can be applied according to the mode. For instance, if the mode bus = 010, then the terminal unit is in RTTY mode, and a 170hz filter is appropriate. If the Mode bus is 011, then the TU is in SSTV mode, and a 2khz filter is appropriate. The terminal unit will function very well w/o any extra filtering, so don't worry about this yet. The mode indicators are: (0-7) CW, 170rtty, 425rtty, 800rtty, Originate, Answer, Rx SSTV, TX SSTV. Yes – the terminal unit will do ALL of those things. <grin> I do not have the print in front of me (and alas, I have not enuf memory to bring up scheme while telecomming… the D0-D7 lines of the EPROM go to the D0-D7 lines of the 6809 and the RIOT chip… so if the print says otherwise, then it's wrong. And I apologize – thanks for pointing it out. Also – kelly, I have plans for a FAR more elaborate SSTV scheme – this will be full color, robot modes and otherwise. The hardware is being prototyped now, and will be MUCH easier to build than the terminal unit. Care to wait? Let me know! –Ben–