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Conference bulova::decw_jan-89_to_nov-90

Title:DECWINDOWS 26-JAN-89 to 29-NOV-90
Notice:See 1639.0 for VMS V5.3 kit; 2043.0 for 5.4 IFT kit
Moderator:STAR::VATNE
Created:Mon Oct 30 1989
Last Modified:Mon Dec 31 1990
Last Successful Update:Fri Jun 06 1997
Number of topics:3726
Total number of notes:19516

2739.0. "DEC special graphics character set on a DECterm" by BLKPUD::TAYLORJ () Wed May 09 1990 14:00

    Hi,
    
    If I create a DECterm and send it the following escape sequence :
    
    	<ESC>(0
    
    it should use the DEC special graphics character set. Indeed it does.
    How does this work ? Does it actually load up the special character set
    from somewhere and if so where from ?
    
    Any thoughts appreciated.
    Jon.
T.RTitleUserPersonal
Name		DateLines
2739.1HANNAH::MESSENGERBob MessengerWed May 09 1990 14:3618
Re: .0

For each normal text (ISO Latin 1) font that DECterm uses there is a
corresponding technical (DECtech) font; DECterm loads this font by setting
the last field in the font name to DECtech.

Within this technical font, characters 32 to 126 are line drawing characters,
and characters 160 to 255 are DEC Technical Character Set characters.

This worked differently in DECwindows V1 (UWS V2.0 and V2.1, VMS V5.1 and
V5.2).  The line drawing characters used to be in characters 1 to 31 of the
ISO Latin 1 fonts (the last field in the font name was 1).  Only the characters
that were different between ASCII and line drawing were stored in these
positions.

Officially, only DECterm is supposed to use the Terminal fonts.

				-- Bob