On 11/18/19 9:52 AM, Grant Taylor via cctalk wrote: > Do you know what protocol name would be used to describe the communications > between the mainframe OS and what it thinks > are locally attached terminals? http://bitsavers.org/pdf/ibm/3270/GA23-0059-4_3270_Data_Stream_Programmers_Reference_Dec88.pdf you'll find lots of information about this side of things going back to the dark ages http://bitsavers.org/pdf/ibm/3270/ZR20-4264-0_IBM_3270_Operation_and_Design_Education_Guide_Sep1971.pdf getting away from applications programmers dealing with data streams is one of the reasons systems like CICS were created the protocol between the 3274/3174 and the terminals is different and varies between the different models of attached terminal. it isn't even EBCDIC
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