tjr@ihnet.UUCP (Tom Roberts) (03/11/85)
I am building an MC68000-based terminal, and would like to implement both a standard ASCII terminal (X3.64), and a graphics terminal (NAPLPS, X3.110). Does anyone know how to do this? The problem is that these standards conflict in their usage of several control-codes and escape-sequences. X3.110 mentions an escape-sequence to select X3.110 mode, but the important character-value is MISSING (to be assigned by ISO). Does anyone know what it is? Is there a similar sequence to select X3.64 mode? A related question: What is the best way to implement device- specific operations (e.g. program downloads)? In X3.110, lower-level protocol layers (e.g. the session layer) could handle this. Also, there are several control characters which are reserved for device-specific actions - they could be used as introducers. Which is preferable? Tom Roberts ihnp4!ihnet!tjr