Calc to calc send and recieve. For clarity, Computer refers to the calculator emulator on the computer, calculator refers to a real TI-89. On the real calc, there are two variables as follows: x string, "www.ubasics.com/adam/" y expression, "26*t^2+85/xy" x sent from the real calc to the emulator. Calculator: 98 06 08 00 1A 00 00 00 0C 01 78 00 9F 00 98 56 00 00 98 09 00 00 Calculator: 98 56 00 00 98 15 1E 00 00 00 00 00 00 18 00 77 77 77 2E 75 62 61 73 69 63 73 2E 63 6F 6D 2F 61 64 61 6D 2F 00 2D 20 08 98 56 00 00 Calculator: 98 92 00 00 98 56 00 00 The following is the same sent from the emulator to the real. Both transmissions don't seem to be right, but I can't see a bug in my program. Obviously during the previous transmission the emulator responded, but it registers as the real calc speaking. The same is shown below, but from the emu to the real: Computer: 98 06 08 00 1A 00 00 00 0C 01 78 00 9F 00 Calculator: 98 56 00 00 98 09 00 00 98 56 00 00 98 15 1E 00 00 00 00 00 00 18 00 77 77 77 2E 75 62 61 73 69 63 73 2E 63 6F 6D 2F 61 64 61 6D 2F 00 2D 20 08 Calculator: 98 56 00 00 98 92 00 00 Calculator: 98 56 00 00