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Date: Tue, 2 Sep 1997 04:30:01 -0700 (PDT)
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From: Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
Subject: Re: kern/4416: syscons: problem with font 
Reply-To: Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
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The following reply was made to PR kern/4416; it has been noted by GNATS.

From: Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
To: eserte@cs.tu-berlin.de
Cc: FreeBSD-gnats-submit@freebsd.org, yokota@zodiac.mech.utsunomiya-u.ac.jp
Subject: Re: kern/4416: syscons: problem with font 
Date: Tue, 02 Sep 1997 20:30:37 +0900

 >>Number:         4416
 >>Category:       kern
 >>Synopsis:       syscons: problem with font
 >>Confidential:   no
 >>Severity:       serious
 >>Priority:       medium
 >>Responsible:    freebsd-bugs
 >>State:          open
 >>Class:          sw-bug
 >>Submitter-Id:   current-users
 >>Arrival-Date:   Fri Aug 29 07:20:00 PDT 1997
 >>Last-Modified:
 >>Originator:     Slaven Rezic
 >>Organization:
 >Private FreeBSD site, Berlin, Germany
 >>Release:        FreeBSD 2.2.1-RELEASE i386
 >>Environment:
 >
 >>Description:
 >
 >	I created a new font and found, that the characters from 0xc0
 >	to 0xdf are not shown correctly: if the right-most bit is set,
 >	this pixel appears to be twice as wide.
 
 This is not a bug in syscons.  Rather it's a strange feature of
 MDA/EGA/VGA graphics card.  Character fonts for these cards are 8-bit
 wide, but are displayed in 9-bit wide cells on the screen, so that
 adjacent characters are comfortably(?) separated by one dot.  This
 would be good for alphanumeric letters.
 
 Character codes between 0xc0 and 0xdf are "graphics" characters
 (lines) in the US character sets (CP437) and many other sets.  This
 extra spacing will be rather annoying for these characters because
 adjacent line characters won't be connected if one dot space is
 inserted.  The MDA/EGA/VGA cards do not put space for these characters
 but replicate the LSB so that the lines are connected.  Strange
 feature, isn't it?
 
 You had better not to use the right-most bits for these character
 codes.  (The fonts in /usr/share/syscons/fonts don't, AFAIK.)
 
 Kazu