We have developed a small application which uses serial ports to connect to othr hardware. The code uses SPORT_CONNECT, SPORT_CANCEL_IO, SPORT_SET_STATE, SPORT_SET_TIMEOUTS, SPORT_WRITE_LINE, SPORT_READ_LINE and SPORT_RELEASE on COM1 and COM2. It runs much slower than desired, about 1/10th of the baud rates of 38.4k and 19.2k. Other apps on the same PC transfer data to the ports much faster. Any ideas?
