Hi, Appendix C Baud Rate and Data Format Baud Rate: 9600 Number of start bits: one Number of stop bits: one Number of data bits: eight One parity bit: odd Data format: -------------------------------------- 7 6 5 4 3 2 1 0 MSB bits LSB -------------------------------------- 1 PR 0 Sx Sy Fc Fb Fa byte 1 0 X6 X5 X4 X3 X2 X1 X0 byte 2 0 X13 X12 X11 X10 X9 X8 X7 byte 3 0 Y6 Y5 Y4 Y3 Y2 Y1 Y0 byte 4 0 Y13 Y12 Y11 Y10 Y9 Y8 Y7 byte 5 -------------------------------------- - LSB is the least significant bit. MSB is the most significant bit. - F is the flag bit, identifying the stylus or puck buttons being pressed: ------------------------------------- Stylus Puck Binary Output Buttons Buttons Fc Fb Fa ------------------------------------- none none 0 0 0 tip button 1 0 0 1 barrel button 2 0 1 0 tip and barrel 3 0 1 1 --- 4 1 0 0 --- 1+2 0 1 1 --- 1+3 0 1 1 --- 1+4 1 0 1 --- 2+3 0 1 1 --- 2+4 1 1 0 --- 1+2+3 0 1 1 --- 1+2+4 1 1 1 --- 2+3+4 1 1 1 --- 1+2+3+4 1 1 1 ------------------------------------- - Sy and Sx are the sign bits for the Y and X coordinates. 1 is positive. 0 is negative. - PR is the proximity bit. When the stylus or puck is in proximity, the bit is 0. When out of proximity, it is 1. - X0, X1, etc. and Y0, Y1, etc. are the X and Y coordinate bits. I can't remember if my MM1201 has any DIP switches inside. Hope this helps Gerold hardware at ees1s0.engr.ccny.cuny.edu wrote: