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KEIL C error message

H Robert

Hello,

My MCU is 89S51/89C51,

System shown below message, when I press debug
Error: *** Device is not supported by Toolchain ! ***
Debugger aborted !

System shown below message, when I press rebulid
Error: *** Project 'TEST_2', Target 'Target 1', Device 'Atmel::AT89C51' is not supported by Toolchain ! ***.

please kindly teach me, how does solve this problem?

Sincerely,

Robert

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