|
RDM Interpretation Questions Discussion and questions relating to interpreting and understanding the E1.20 RDM Standard. |
|
Thread Tools | Search this Thread | Display Modes |
November 4th, 2019 | #1 |
Junior Member
Join Date: Jul 2019
Posts: 7
|
ISO/IEC 646 text encoding
Hello,
I am developing a software tool which can use the RDM protocol and I have a few questions regarding the mentioned ISO/IEC 646 standard when it comes to handling text transmitted via RDM. At first, ISO/IEC 646 is meant to be a 7 bit standard, but from the fixtures I've seen, they all encode their labels in 1 byte per character. So am I assuming correctly that most significant bit is always padded with a 0 to comply with the byte pattern? Second, ISO/IEC 646 defines code points which can be replaced by a local character set, for example 0x23 or 0x5B. What is the correct character set to use when it comes to displaying the text? There are a few options:
Finally, ISO/IEC 646 defines symbols which are not printable characters, e.g. 0x7F (DEL) or 0x0B (VT). How would a software handle the display of said characters, do you have any advice? At the time I am very confused by the information E1-20 has given me. Did I miss something? Best regards, Robert |
Bookmarks |
|
|