I have a board with an 89S8252, configured with VNM at Address 2000-7FFF, 0000-1FFF is Flash. I have configured Mon51 with install 8 7f 0. I have Set Intvects and Cseg at 2800H. I get the connection with Mon51, it downloads my program and than gets into and endless loop somewhere. Hardware reset on the processor board results in a jump to 2800H, but there it stops instead of going to main. The go command proceeds then normally to main. Whats wrong?
BTW install 0 7F 0 (fixed Baudrate, timer one) is exactly the same!
You need to configure the debugger as explained under: http://www.keil.com/support/docs/3004.htm Reinhard
Many thanks, that solved the problem!