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TCPIP1940 protocol specification

Question asked by BenKB on Mar 27, 2015
Latest reply on Mar 28, 2015 by BenKB

Hello all,


is there a document describing the protocol being used by TCPIP1940?

I looked to this page, but this is clearly not the same protocol when you compare the source code with what you can see on Wireshark


I have found that the following sequence 1B 00 41 08 00 05 06 01 00 0A 52 02 00 writes to the Core Register (address 0x0A52) the two following bytes 02 00, so it's pretty direct

But when I look to the section in which the code RAM content, the parameter RAM content, etc... are loaded, this becomes absolutely cryptic

For example, the 40 bits instruction 00 00 00 E8 01 does not appear anywhere in the TCP stream, like if it is encrypted (which would sound very strange since you can directly see the bytes sent to Core Register.


Thanks for your help