Sorry Guys, A51.startup wont work, coz as the name implies, its only run at startup, My 8052 controls a sensor, scales it and sends the message serially with crc and BIT result every 5msec, so I need to test the chip every 5msec. then check the BIT to decide weather to accept the sensor reading or not.(very tight)
Peter is also right, i want to test all addressing modes of the 8052, but this can be done on fewer locations of the ram once the ram passed the indirect addressing mode.
I think Also i need to disable all interrupts before i proceed as someone suggested earlier.
Thanx for your enlightning ideas.
Mahmood