The Ctrl-L is commonly used as the form-feed character. CRLF is typically
used by Windows-driven embossers; it may be user-configurable on some
models. Many embossers accept escape sequences to activate special
functions or change operating modes.
There are many different translations of ASCII/Unicode characters to
braille, depending on the language being used. You might gain some insight
by discussions with the developers of BrlTTY or the LibLouis project. And
you need to know what width and page depth have been set for a particular
embosser, because they are not usually set to wrap long lines. Hope this
helps.
At 10:45 AM 2/16/2009, you wrote:
Hi.
As soneone who last time used a real-world braille printer
approximately ten years ago under DOS, I find myself in need to
write code to print braille on different platforms (Linux, Windows,
possibly MacOSX).
Is anyone here familiar with the details of how the text stream sent
to the printer needs to be formatted? How, for instance, are
pagebreaks indicated? In UNIX, I am used to ASCII character 12,
but given the CRLF/LF Windows/UNIX linefeed differences, I am guessing
it isn't that simple. What do commonly used braille rpinters expect?
Additionally, what braille mapping do they expect? Since I am
printing dot patterns, it is very important that what I send
is what ends up on paper in dots. I guess I am asking too
much from nowadays braille printers to understand unicode braille?
If so, what mappings are typically configurable on a braille printer,
and what is the default, if any?
Thanks for every help you can give me
--
CYa,
â¡?â ?â ?â ?â ? | Debian Developer <URL:http://debian.org/>
.''`. | Get my public key via finger mlang/key@xxxxxxxxxxxxx
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`. `'
`- <URL:http://delysid.org/> <URL:http://www.staff.tugraz.at/mlang/>
Lloyd Rasmussen, Senior Project Engineer, Engineering Section
National Library Service for the Blind and Physically Handicapped
Library of Congress (202) 707-0535 <http://www.loc.gov/nls>
HOME: <http://lras.home.sprynet.com>
The opinions expressed here are my own and do not necessarily represent
those of NLS.
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