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A design of 32-bit single-board computer system based on SPARC V8 is introduced in the paper, which is based on SPARC V8 ATMEL CPU AT697. Its highest frequency is 96 MHz and integrate 4 MB SRAM and 2 MB +512 KB flash on-board, supporting 2 internal 24-bit timers, 3 UART serial communication interfaces and 15 interrupt sources (4 external interrupts). It provides a 2 MB local bus expansion space. It has proven that the system can meet the userspsila requirements well.