Hello Peter,
I got a question about calculating the value you provide in offset 0x3324. When I use offset 3324 in my 737NG Glass software I'm working on, it updates rather slow. When I make a climbing turn the heading rose keeps turning smooth but the alt tape (which uses offset 0x3324) has hickups. The tape stops for a moment and then continues again. So I changed the offset it uses to 0x0570 or 0x6020. Now the hickups are gone but these offsets don't take the pressure difference of the QNH and the kollsman altitude setting into account. When I try to calculate them from offset 0x0330 and 0x0EC6, I can't get the result from offset 0x3324. I come close but the difference is not always the same. Could be rounding errors, but I don't know for sure. Could you tell me how you calculate this offset and with what offsets please, so I can get rid of those hickups.
Thanks, Rob van der Wiele
Here a picture of the 737NG PFD.