01-23-2019, 12:59 AM
(This post was last modified: 01-23-2019, 06:30 AM by John_Newcombe.)
(01-22-2019, 03:22 PM)admin Wrote: The WiModem's emulate the Hayes specification, which allows for a single character for CR, LF, and BS. I am not sure what you mean by an alternate CR? Do you mean supporting both 0x0D (normal CR) and 0x5F? The problem with that of course is that 0x5F is a valid ASCII character (the underscore "_" symbol), which is used during BBS'ing.
Is this an input only thing that you need to the WiModem to understand, or also an output?
What I mean is that you use 2 S registers, one for a normal CR (with 0D) and an 'alternative one' (with 5F). Both the normal and alternative ones are valid when in command mode i.e. when issuing AT commands. However, when online, the 'alternative' CR is ignored and 5F is treated as a normal underscore. There are many unused S registers that could be utilised for this. This only needs to be an input as it's simply to configure the modem using AT commands and videotex software displays normal CR/LF correctly.
By doing this, it saves the user having to load terminal software to change the CR S reg before using videotex software, and then having to do the reverse when wanting to access a BBS.