C-Net Week #24 28 июня 2007

Интернет

Just i-net - Internet on the Spectrum, which has already been done and why.

ICQ deviate from the issues
oooochen:) close to
Spectrum - is InterNet.
Development on the subject being
long enough. For example,
foreign friends, even
have had some success
to implement. But with our
hand as a special development
ideas were not. Even though
that the Hayes-compatible
modem can be connected
Spectrum for a long time,
use in practice was
only for communication with FIDO.
Perhaps this is due
lack of sufficient
documentation on this topic
and perhaps banal laziness
understand all this.
But somehow over the last
time picture of a little
changed. For example
development of Caro (Kamil
Karimov) - PING and INTIME. Ping
interesting, because using



program INTIME (the screen)
implementation of the ICMP (protocol
which stack is over IP,
as well as TCP stands over IP)
You can check
availability of the host (server)
the internet and get the time
response. It was written,
of course, already in autumn 2005,
but the fact that the first step
made, could not but rejoice.
In spring 2007, appeared
second development - INTIME.
Having a real Spectrum (or,
at least the same Unreal;)
c Hayes-compatible modem
connected to the scheme
Kondratyev, with INTIME
You can also connect connect
to the Internet and request
from one of 4 preset
TIME-servers current time.
Yes, this is much more serious
step that allows something
ask and get an answer
at least from the same
time-server. In addition,
The program features
function resolv, which
allows the server's name
- To get its IP-address.
Now a storm of emotions on the forum
zx.pk.ru somewhat subsided,
but I think in the near future
Caro, we are still surprised.
In 2003 (when
24y planned number)
I found a small note
about such an interesting fashion
protocol for mobile
phones like WAP (protocol
wireless access). How
sideways is the ratio
to zx-spectrum? I think
some will become clear after
read below
text, if we replace
phrase  with the word
<zx-spectrum>. So ...

What is WAP?

WAP - Wireless Access
Protocol, that is, a protocol for
wireless access. Usually
to the Internet. Unlike other
access methods when
Cell phone is the only
mediate between the computer
of a species, this
protocol was developed,
primarily for access
from the mobile phone
through built (in the software
phone or SIM-card)
WAP-browser.

Feature of the standard
in its openness and the fact that
it takes into account (as opposed to
from the traditional protocols
such as HTTP) Features
cell phone
and PDA, and wireless
Access ...

- Small memory
device;
- Small screen size
phone, as well as
limitations of the keyboard;
- Low CPU speed;
- Low bandwidth
a communication channel;
- Maybe more timeouts.

What is it good?

First of all, WAP - means
access to resources
Internet via
mobile phone. At the same time
the user does not use
the assistance of any kind was
additional devices
such as computer or modem.
WAP (Wireless Application
Protocol) - a protocol or
technical standard
describes a method by
which information from
Internet is transferred to
small display of mobile
phone. In this case, then
is the main difference
WAP from the usual methods
Access to global network,
that provide an exchange
Information and Image
Web-site (HTTP
and TCP / IP). Theoretically, if
to the mobile phone screen
"Could" show so much
same information as the display
computer, and there was no
WAP would in such a form in which
He is available now.
But the displays of mobile
phones, even with
high resolution can not
"Instead of" ordinary Web
- Pages. It is this
caused a
special ways
allowing users to
Mobile Phones
use the Internet.

WAP-browser

To use WAP,
must have a mobile
phone with WAP - browser. WAP
- The browser is a program
recorded in the phone memory
and is responsible for exchange
information and mapping
on the display (Internet
Explorer - Web-browser
conventional computers.) WAP
- The browser does not have all
phones, but it is important
not only the availability of WAP
- The browser, but its version.
Currently, four of them:
Version 1.0, 1.1, 1.2 and 2.0
. Version 1.0. obsolete
and has virtually no
does not occur, including
and in our country, and the latest
WAP 1.2 and 2.0 until
used.

WAP-resources

What are the opportunities
open before the owner
phone with WAP?
With the advent of WAP-protocol
subscribers of cellular networks
were able to
enjoy a number of suppliers
services and on special
WAP-sites: such as
e-mail, electronic
shopping, booking tickets
and hotel accommodations, access
to your bank account,
information channels
(News, weather, course
Rates, etc.) and even
electronic guide. During World
network with each passing day there is
more and more WAP
- Resources. For many
popular Web-sites created
their WAP-twins who
provide "mobile"
users with the same set of
services. For those who want to
evaluate one or another WAP-site
without leaving your
computer, there are
WAP-emulator that
possible to reproduce the work
with WAP on a mobile display
phone.

It looks like this: Display
WAP - sites on display
mobile phones
poor graphics
and animation (this is
low-res
and the low rate
data communication channels,
However, this drawback is
overcome, it just
the introduction of new
developments, in particular,
protocol GPRS). For
display
on your cell phone
used as a rule,
four lines. The main principle
reporting
on a cell phone -
partition data into small
blocks of two to three
WAP-screen phone. This
may be information on courses
Rates, quotes Securities
securities, or, for example,
a small letter.

Prospects WAP

With the introduction of WAP opened its
advantages and disadvantages. Its
opinion of it expressed as
professionals and ordinary
users, which is important
not so much the process as
the final result.
Objective assessment is as follows: WAP
in the form in which
it exists now requires
significant improvement.


Due to the small size
displays, WAP Interface
leaves much to be desired. If
small messages can be
read fairly quickly,
it can contain up to hundreds
characters are slow
"Flipping". Also relevant
data rate
with mobile terminals, the
more than that for the time
with WAP you have to pay: Latest
lack of new fixes
data transmission technology
GPRS, which not only
increases the rate of exchange
several times, but
can not pay for the time
and for the amount of accepted
information.

WAP-technology in its
present form is still
transitional solution.
Developers have modernized
it eliminates the
initial flaws.

Now how it all sideways
bolted to the Spectrum?

   Perhaps at this course
Protocol has no future
because the speed of the Internet
grow, mobile phones
long are not what
were 5 years ago and more
like a pocket
computers (PocketPC). However,
despite all this, I think,
pay attention
to this protocol through the eyes of
Spectrum. TCP / IP - enough
resource-intensive protocol
requires a CPU
time and sufficient
memory. And many believe that
its implementation was much
done more easily in the form
some devaysa with
independent processor
and cache. And if it's still a
implement a standard
gland, and even http, then who
I personally do not believe that we have
enough for all the Spectrum. Although
foreign authors and
implement support
on the Yamaha MSX, I still
I think that wap comes
Spectrum more, since
takes into account the limited
devices: memory,
screen size, low speed
processor.

Of course, as the saying goes
tryndet not tossing bags,
but maybe this idea is not so
and devoid of meaning. At
least in the presence of free
time, I will try to find
documentation and wap
understand in more detail,
what and how. Which is easier to
to implement and what
really need to Spectrum.
Always glad to hear a sensible
criticism on breeze@tut.by. 'At the end of the first
Part CWEEK'24! You can press
BREAK and select the second part
;