I have a problem when using the mon51 with dallas DS5001FP. I set the DS5001FP program memory in addr. 0x0000 until 0x7fff and the data memory in addr. 0x8000 until 0xffff. Then I install the mon51 in the program memory range with a single 8Kb EEPROM. I use 32Kb RAM as data memory. I use the keil debugger and download my code to the RAM unfortunately, there's a report NO CODE AT ADDR 0x0000 . What your suggest for my problem. thank you Agung G.