测得监控和几块仪表的通讯报文，并整理如下，猜测每帧报文的倒数2 3字节是校验码，有大神知道这个是怎么校验吗？

表2

EB 90 EB 90 08 01 00 01 00 FF 7F 3C FF 

EB 90 EB 90 0C 01 00 01 80 00 14 00 00 00 AF 8C 00 

表3

EB 90 EB 90 08 01 00 02 00 FF 26 6C FF 

EB 90 EB 90 0C 01 00 02 80 00 94 63 03 00 3D 5E 00 

表4

EB 90 EB 90 08 01 00 03 00 FF 11 5C FF 

EB 90 EB 90 0C 01 00 03 80 00 28 05 00 00 47 44 00 

表1

EB 90 EB 90 08 01 00 00 00 FF 48 0C FF    

EB 90 EB 90 0C 01 00 00 80 00 9C B5 03 00 0F 4A 00 

表5

EB 90 EB 90 08 01 00 06 00 FF FA AC FF 

EB 90 EB 90 0C 01 00 06 80 00 FF 99 03 00 9F C6 00 

表6

EB 90 EB 90 08 01 00 07 00 FF CD 9C FF 

EB 90 EB 90 0C 01 00 07 80 00 34 99 03 00 8A 1C 00 

表7

EB 90 EB 90 08 01 00 08 00 FF E1 AD FF 

EB 90 EB 90 0C 01 00 08 80 00 17 99 03 00 AC 67 00