Diagnose instructions require that you be in supervisor state. Thus, you'd need to have it occur in a device driver. Are you operating as a 3270 or in the line-mode (3215) emulation of a virtual machine console?
> -----Original Message----- > Hello, > > I am working with Linux/390 and I am trying to do a few things with > the 3270 console. One of the first things I am trying to do is to > clear the screen. I have been unable to do that so far. I > have tried the > following things: > - Looking in the termcap or terminfo databases. The > termcap and > terminfo sections for 3270 are quite incomplete. > As a result, > programs like /bin/clear don't function properly. > - In looking around, I found a diagnose 58 call that > appears to work in > CMS, but fails with an invalid instruction in > Linux. Either I am not > calling it correctly, or it doesn't work unless you > are using CMS. > > I am looking for an easy way to clear the 3270 screen from Linux. If > anyone can point to documentation about that, that would be greatly > appreciated. If anyone knows if it is possible to clear the screen > with inbound data that would be even better.
