os.2.1vkostic,
>> Poruka Dejana Ristanovica 30.11:
>> ... ili sva ta priča o OS/2 koji nit je kompatibilan sa
>> DOS-om nit nije, nit je za 386 nit ga ko koristi na 286...
Da, stvaro, kako stoje stvari sa OS/2 ? Imam utisak da ga
kompjuterski casopisi jako forsiraju, ali ne i korisnici niti
programske kuce.
Pozdrav, V.K.
os.2.2danko,
Izgleda da će u trećem kvartalu ove godine izaći OS/2 verzija 2.0
koja će se vrtiti samo na 386 fimiliji i koristiti sve mogućnosti
procesora. Znači imaćemo 32-bitni mod sa 32-bitnim segmentima, novi
fajl sistem (iz OS/2 1.2), više konkurentnih DOS box-ova, nove
kompajlere sa 32-bitnim modelima itd. Lepo zar ne? DANKO
os.2.3ilja,
Moram da kažem da ja još nisam video ni OS/2 1.1. Ima li to neki
korisnik SEZAM-a i na šta liči? A Presentation Mgr?
Ilija
os.2.4dejanr,
Evo vesti o OS/2 2.0 sa BIX-a - ponovo zvuči kao "ono pravo" ali
ponovo kasni, pojaviće se navodno tek krajem godine.
==========================
microbytes/features #245, from microbytes, 5434 chars,
Fri Feb 2 21:48:56 1990
--------------------------
TITLE: A Preview of New, Improved OS/2
In a technical briefing this week, Microsoft took the wraps
off its awaited version of OS/2 that's optimized for the 32-bit
architecture of the Intel 80386 and 80486 processors. OS/2 2.0
has some major new features that differentiate it from current
versions of OS/2, which are based on the 16-bit 80286
architecture. Unlike the 16-bit segmented memory addressing model
supported by OS/2 1.2 and earlier versions, OS/2 2.0 supports a
paged memory addressing model similar to that used in UNIX,
allowing much larger data structures than the 64K-byte segments
allowed by the 16-bit architecture of the 286.
OS/2 2 can use the 8086 Virtual Mode of the 386 architecture to
allow up to 16 simultaneous "virtual DOS machines" to run under
OS/2 -- which will allow you to cut-and-paste text and, to a
limited extent, bit-mapped graphics -- between DOS and OS/2.
OS/2 2 supports the new Royal fonts, or outline fonts, that are
supposed to be supplied as part of Apple Computer's System 7.0
Macintosh operating system to be released later this year.
(Microsoft and Apple have "crossed-licensed" the printer support
software and the outline fonts. The Royal fonts are the
Apple/Microsoft alternative to PostScript).
That's the good news. The bad news is that OS/2 2 is far from
complete and is only available in preliminary form to OS/2
software developers. Software Developer Kits priced at $2600 have
been shipping to OS/2 software developers since December.
Microsoft hopes to have a commercial version of OS/2 2 available
by the end of this year.
The One They Should Have Done
-----------------------------
Nevertheless, OS/2 2.0 is the operating system that developers
have been waiting for. In fact, many developers and analysts
think that the 32-bit version is what Microsoft should have
started with, rather than the poorly received 16-bit version,
which has limited DOS compatibility and the data structure
limitations of 64K segments imposed by the 16-bit architecture.
Vendors of computer-aided design and numeric-intensive scientific
and engineering applications have complained about the 64K-byte
data structure limitation, since many of the arrays and other
data structures used in numerical applications exceed 64K bytes.
Using 16-bit OS/2, programmers had to use cumbersome workarounds
such as "huge memory models" and "far pointers" to access larger
data structures than 64K. In addition, 16-bit OS/2 allows only 1
DOS-compatibility window and limited interaction between DOS and
OS/2 applications.
These problems are gone in OS/2 2.0. Data structures can be of
virtually any size and are comprised of 4K-byte pages, which can
be swapped in and out of memory on demand (demand paging). With a
maximum address space of 4 gigabytes, OS/2 2 can support any
realistic application size or number of multiple tasks.
Microsoft hopes to be able to run OS/2 2 on systems equipped with
4 megabytes of memory. However, the current developers' version
requires 6 megabytes, and, as with other multitasking systems
such as UNIX, the more memory you have, the better the
performance and the larger the applications and number of tasks
that can be executed. A typical OS/2 2 system in the corporate
environment will probably have 8 megabytes, like most UNIX
systems.
Up to 16 DOS sessions can run under OS/2 2. It is possible to cut
and paste text and bit-mapped graphics from DOS windows into OS/2
windows. Pasting from OS/2 to DOS, however, is limited to text.
There are restrictions on the types of DOS programs supported
under OS/2 2. Programs requiring DOS "extenders" such as VCPI or
those supplied by Phar Lap and Rational will not run under OS/2.
This means that many of the most recent DOS applications will not
run in DOS windows. On the other hand, many programs using DOS
extenders are also available in OS/2 versions. In fact, Lotus
Release 3 is designed to run "out of the box" under either DOS or
OS/2, simply by setting a menu option.
OS/2 2 offers limited support for DOS device drivers. For
example, Microsoft does not plan to support device drivers for
network cards operating networks within DOS sessions. Obviously,
Microsoft wants to promote the use of OS/2 for networking.
It's Not Ready
--------------
In spite of the improvements in OS/2 2, it isn't ready yet. While
the new edition will run 16-bit OS/2 Version 1 applications,
software developers will have to significantly modify their
programs to take advantage of the 32-bit memory model of OS/2 2.
But developers are more likely to support 2.0 because of the new
memory model. Microsoft says it plans to eventually release a
"Portable OS/2" that will run on other microprocessors, such as
RISC, and on multiprocessor systems.
DOS compatibility is one thing that will bring some people to
OS/2 2 rather than UNIX. As one developer pointed out, companies
have millions of dollars invested in DOS programs, many of which
are customized, vertical applications. The ability to continue to
run these older programs, while taking advantage of the
multitasking features of OS/2, will be a major attraction to
corporate DOS users, of which there are probably several million.
If Microsoft can deliver OS/2 2 this year, it will certainly
capture a larger share of the multitasking operating system
market than its predecessor, version 1.
--- Nick Baran
os.2.5miro,
Ima li neko da se bavi sa OS/2 ?
Treba mi pomoc !!
Dobio sam verziju 1.1, izgleda mocno, ali neke stvari ne mogu da
prokljuvim, a nemam User's Guide (a imam Programmer's Guide :)).
Pozdrav,
O
/█>
Ů Ţ
▀ ▀ Miro.