remont Posted February 1, 2006 Report Share Posted February 1, 2006 Hi Peter. I use PM, FSUIPC and EPIC system in my flightdeck. How can I sent a negative value to offset 04E6 ? EPIC can't handle it with nqw. To sent +2000 fts/min, no pb, but to sent -2000fts/min, it is impossible. But, when using pigeon holes for this 04E6 offset, I can get the sign of the value with the mask 0X8000. But it is from a code I get on the internet, so I don't understand it. By the way, this offset is told to be read only, but I can write it and it works. So Can you tell me the format of the value in this offset, by exemple, for a VS of -2000 or -700. Something in hex format ? I will figure how to make it and sent if via my EPIC code. RE http://remont.free.Fr/cockpit Link to comment Share on other sites More sharing options...
Pete Dowson Posted February 1, 2006 Report Share Posted February 1, 2006 I use PM, FSUIPC and EPIC system in my flightdeck. How can I sent a negative value to offset 04E6 ? Whether a value is positive or negative is all in the interpretation, not the value. In 16-bits, for example, a value 65535 looks identical to a value of -1, depending whether you treat it as signed or unsigned. In hexadecimal they both look like FFFF. EPIC can't handle it with nqw. To sent +2000 fts/min, no pb, but to sent -2000fts/min, it is impossible. If this is in a 16-bit (2-byte) word, then send 63536. It is the same. Calculate it as 65536 + (the negative value). In EPIC you would need to do 65535 - (your positive value, eg 2000) then add 1. The 1 difference is needed because 65536 cannot be accommodated in 16 bits. Regards Pete Link to comment Share on other sites More sharing options...
remont Posted February 1, 2006 Author Report Share Posted February 1, 2006 Thanks for the support. Will tell you if I succeded. Renaud. Link to comment Share on other sites More sharing options...
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