3270 controller simulation

Chuck Guzis cclist at sydex.com
Mon Nov 18 15:22:28 CST 2019

On 11/18/19 12:37 PM, Dave Wade via cctalk wrote:

> One thing which complicates things is that we have (roughly) layered protocols in place between the 3174 and the host. 
> So at the physical level we have channel attached, SDLC, Token Ring and bi-sync.
> Above that we have the channel protocols, HDLC/SDLC and bi-sync polling.
> Then we may have SNA (which encompasses many options) to transport the data through the network.
> At the top the protocols and frame formats in the Data Streams manual which are broadly the same but with tweaks for SNA, Local and Bi-Sync.

You can say that again.  We never could get HASP running on out 11-750
on BSD.  This was about 1984.   The Berkeley Systems Group even tried
and no soap.    This was a leased line setup with Bell 209 modems.


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