Hi David,

DVH>-> C is probably the most common high level language used for
DVH>-> programming embedded systems, very few of which have a pixel
DVH>-> addressible display. I'll probably be getting a C compiler and tools
DVH>-> for the 8051 soon for a job I'm quoteing for, no display hardware
DVH>-> involved at all. That is why we keep pointing David to appropriate
DVH>-> echos for the OS and hardware he is using.

DVH>Well, last I checked it this echo was called the C programming echo, and
DVH>I believe that it is general C. I am doing C on practically ALL 80x86
DVH>systems. I am connected to the OS/2 programmers echo, but I want to here
DVH>some general C info for DOS, OS/2, and Linux (The best). I don't believe
DVH>I should have to connect to three echos for generalized C do I?

That is a limited subset of the C systems available. I also code on non
80x86 platforms and some of the regulars here use 68000 based systems
(Ataris, Macs, Amigas).

You are asking about graphics programming, specifically manipulateing
pixels, and there is no "general" way available across the three
platforms you mention.

Under DOS you access the screen memory directly, but you either code to
a lowest common denominator display capability (usually VGA) or have to
do a lot of work covering variations between display adaptors.

OS/2 provides a graphics mode interface as a standard part of the OS/2
system, with a defined set of APIs for PM (GUI) applications, but this
is primarily targeted at moveing pre-built blocks of graphics.
As you have BCOS/2 look at the IBM provided jigsaw sample code (in
BCOS2/EXAMPLES/JIGSAW) which uses much of the graphics API.

Linux is basically a text mode OS with several alternative means of
graphics support, the portable one being X-Windows (versions of which
are available for OS/2).

You mention 3 OSs, as well as the Windows family there are many other
80x86 OSs available, they're certainly not "practically ALL 80x86
systems".

George

 * SLMR 2.1a * You can lead a user to Docs, but you can't make 'em read.

--- Maximus/2 3.01