Hi there, I am using a Cypress Fx2 chip which has an enhanced 8051. I am able to debug using the mon51 mon-ext-sio0-c0.hex supplied from Cypress. This version uses sio0 and external memory from 0xc000-0xcf75. The Problem is that the working monitor starts the CPU with 12Mhz. But I need 24Mhz. As soon as I switch the clk I loose my serial connection (since the Baudrate changes). How can I configure the Monitor firmware to start with 24Mhz? I tried to configure mon51 as described in the Keil documentation, but I never got one working at all. Any suggestions on getting those to work in general are welcome. Thanks in advance, Wallace