Unix layers- using /dev/sxt---

[David J. Carpenter]

How does one really use the /dev/sxt--- devices on an AT&T 3b2 Unix 5.2?
There is a progrsm shl, shell layer manager, that lets you have multiple
shells all spewing forth at once, but how do you separate the output into
windows, for example, at the terminal?  Is the device driver in there
incapable of this right now?  Do you have to write one? (or modify it)
The manual makes little mention of this.

Thanks...  ..!ihnp4!wlcrjs!djc