Hi Dave, I have been involved in a project using VAX-2780-3780PE and have been able to connect two VAX’s together using a Black Box Synchronous Modem Eliminator ( SME ). Product code: ME204A-F. No VAX PSI involved. Needed Decnet Plus and Wan drivers.
Was able to test using a utility that comes with the Protocol Emulator - XJTEST which can use either VAX as a loopback. In my case it was a DSV11 to a DSW42 using the SME and the V.24 cables that come with the adapters. There is also another utility called REMOTE that can transfer simple files from VAX to VAX. I don’t think there is a driver for SIMH that can emulate a sync device. ( yet ). Regards, John Welsh. Sent from my iPhone > On 20 Mar 2020, at 03:38, dave porter <dave_list_a...@verizon.net> wrote: > > I know almost nothing about VAX PSI, but I have a vague idea > that even though X.25 is asymmetric and intended for DTE to DCE communication > (i.e., your computer to the phone company's premises), it may be possible to > coerce it > into talking from one VAX to another (via null modem > cable connecting two devices such as DUP-11s). > > I worked on RSX-11M PSI and that's how we tested in > the lab. I can no longer remember how that was done. > Undocumented option somewhere, no doubt. > > > _______________________________________________ > Simh mailing list > Simh@trailing-edge.com > http://mailman.trailing-edge.com/mailman/listinfo/simh _______________________________________________ Simh mailing list Simh@trailing-edge.com http://mailman.trailing-edge.com/mailman/listinfo/simh
