Hello,
i'm just collecting the available information for the following scenario -
so maybe that has been solved long before or somebody has valuable hints
on it (it actually sounds very simple):
- Starting point: a system running Linux (either in text mode or using X)
- Intended mode of operation:
* i'd like to use a text "terminal" (with a size = lines*columns that
can be dynamically chosen) - so operations like "cursor goes to the
beginning of next line of previous is full", scrolling ... work well
inherently - and applications don't have to care for it
* the ASCII context of the display is transmitted to an external
display (e.g. a monitor/HMD using the BOB-II serial=>NTSC/PAL
converter)
* the "external" device is rather "dumb" - basically it can display
ASCII characters at a postion you specify (it's not a full featured
VT100, i guess then it would be very simple)
* "refresh" operations are either synchronous (whenever something on
the original display changes) or asynchronous (the external display
driver "polls" the original "screen" and may still do some kind of
optimization on whether and which data has to actually be
transmitted).
If we worked with some kind of "memory mapped terminal" that would be very
simple - you just had to check a certain memory area for the information.
>From what i understand the whole thing also has been done when treating
the display data as "full graphics data" - that's what a graphics
framebuffer device does (and those are well supported by Linux)
=> a question to the MITthrill people - is it possible to access the
code you developed for driving the modified MicroOptical QVGA
displays (is it 320x240 color btw?) via a specialized framebuffer
driver?
Anyway - for the ASCII-text-only case - is this functionality already
present or can be implemented in a very simple way using "standard means"?
Any ideas are very welcome! Having kind of a "xterm" with user specified
size and the ASCII content of just that "xterm" (that can still "live" on
a primary screen) transmitted to an external viewing device would also be
great.
best regards
ralf
--
Best regards,
Ralf Ackermann
---------------------------------------------------------------
Hosting the IP Telephony Field Trial for the Darmstadt Region
---------------------------------------------------------------
Ralf Ackermann _ 
Industrial Process and |/ | | |\/| Merckstrasse 25
System Communications |\ |_| | | 64283 Darmstadt, Germany
Tel.: (+49) 6151 16-6138 Fax: (+49) 6151 16-6152
---------------------------------------------------------------
http://www.kom.e-technik.tu-darmstadt.de/~rac
---------------------------------------------------------------
--
Subscription/unsubscription/info requests: send e-mail with subject of
"subscribe", "unsubscribe", or "info" to 
Wear-Hard Mailing List Archive (searchable): http://wearables.blu.org
Please, *PLEASE* don't subscribe through a forward/expander/false domain
From Wear-Hard Mailing list Archive (WH)
Maintained by R. Paul McCarty
Archive created with babymail