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I have the trouble with "Keil uVision2 V2.37". Namely, the program which is working properly on the AT89C55WD bahaves very strange on the AT89C4051 platform. The program does not use any special features of AT89C55WD like T2, watchdog, etc. I'm using only peripherials accesible on both ones and header files in accordance with the type of uController. Code is less than 4kB and there is used less than 128 B of DATA memory. There is no never ending loops but AT89C4051 hungs up or works not correctly. I thought that after testing program using AT89C55WD I can load the same one into AT89C4051 code memory and it must work the same way. What can be wrong? Thank you in advance for the help /Robert Zdunski
as I think That very stetement has killed more designs than any other. Erik