Historically this functionality was reimplemented within each
DEVICE simulator often with slightly different implementations
and inconsistencies. Solving this globally within SCP required
changes in many places, but should henceforth be reasonably
managed.
As discussed in #1034
Removed DEV_NET and fixed DEV_type on various devices.
Support for 64 lines on KL10 FE by default.
Fixed support for 32 lines on DC10.
Support for TYPE 340 Display undocumented functions.