(...) Ok yesterday evening i tryed to track down this problem. Using a y cable and my old terminal. The communication starts normaly. The first frame was transmitted correct, 'rx' answered with <ACK> but the RCX never sees the <ACK>. If i type the (...) (25 years ago, 15-Dec-99, to lugnet.robotics.rcx.pbforth)
I've got the similar effect with my Cygwin+'rx'. One of the problems was the COM port speed: it was 9600 instead of 2400. Have you checked your port settings? Anyway, something other remain... I will try it again tonight. Sergey. (...) (25 years ago, 15-Dec-99, to lugnet.robotics.rcx.pbforth)