Hi, Here's v2 of the outstanding fixes for Oxford Semiconductor 950 UARTs, comprising an chip-specific clock handling implementation for accurate baud rate selection including higher baud rates and FIFO rx trigger level configuration. NB I have since had an opportunity to check what transceiver chips have been used with the option card I have been experimenting with, and they've turned out to be the Zywyn ZT3243F, specified for up to 1Mbps, so no surprise they eventually gave up as the rates I have tried increased, and quite interesting it was only at 4Mbps that they did it. Please apply. Maciej