Trying to use the code shown in the following http://www.keil.com/support/docs/2045.htm Basically, shows you how to do In Application programming on a philips device. I have set my target device to a p89c662 which supports this, but when I call the code inside the debugger (uVision pretending to be the device) it gets to the CALL 0FFF0H ; call philips firmware line and chokes with the error: *** error 65: access violation at C:0xFF00 : no 'execute/read' permission I'd like to test it before I go anywhere near the device itself, am I missing something or can the C51 enironment not replicate that particular function?
Thank you(!) Robert for the help :) Greatly appreciated. Robert