Iron - Disk drive 3.5. From purchase to maintenance: the selection and installation,
connection podmenitel drives, floppy disks choice, the advantages and disadvantages 3.5.
IRON
(C) Yuri Buravtsov (OneSOFT)
DRIVE 3,5 ":
from purchase to repair.
Instead of Preface
This document is intended for those
who decided to connect a three-inch
drive his car. And they certainly are absolutely right: have
long ceased to recruit PC Floppy Disk 5.25 ", because a
three-inch drive yet more compact than its" older " brother,
and "three-inch" floppy disk damage is much more complicated
than flexible. These, too, preserved in its title
"flexibility", while bend it even if brute force is very
problematic. By the same on the smaller size is already
possible to write two times more than the "traditional".
In Russia, 3,5 "not so long enjoyed preferential popular since
a long time there was no specific reason for the mass"
reorientation "to 5.25" to 3.5 ". Y We do any innovation is not
perceived at all, and not always willingly (remember the fact
that until now, instead Windows'95 many fans of retro-software
products continue to recruit hard on their keyboards with the
birth of the PC well-turned phrase "Nc \ nc <enter>"). And if
you've seen before IBM PC with a set of 5,25 "1,2 M; 5,25"
360/720 Kb and 3,5 "1,44 M, then these machines are, apparently,
collected domestic companies, dealers known corporations
meeting the requirements Users of the Russian and world
standards. But the market dictates its laws, and Now you will
not find software on anything other than a floppy 3.5.
Responding to global requirements, known
sinkleristov circles of Petersburg firm
Scorpion also focused more on
3,5 ", true, but rather under the influence of savings on the
power supply and space in Mini-Tower'e, but the fact remains:
for Speccy appears a new standard in the Russian market. In
this connection there question: if I could with their modest
(Rich, no one - delete as applicable)
knowledge itself to connect a second (third,
fourth, ... ) Drive if it is - a three-inch? The answer is: it
is possible. If you can buy expensive things, holding a
soldering iron and not afraid to burn your previously available
drive, then this article can provide you with substantial
assistance. Maybe not everything will be set out, although I
try to explain all the problems and the openness with which I
have ever encountered. Experience I have a not too rich, but
because a radio-education venture
assert some aspects, set out in
this article.
Choosing and Installing
Drive I bought in July, one thousand nine hundred ninety-six.
Obbegat all firms - wherever is cheaper (not out of greed, but
from the thrift, which subsequently helped). Cheaper only in
the market Avtovo, but they can sell not just a good thing. But
a reliable indicator of a trehdyuymovok somewhat lower than
that pyatidyuymovok. I bought a Mitsumi drive on
Countryside. They sell PC Hardware
(Later proved to be the cheapest - not
therein). While plowing the drive, there were no problems, but
it is now in its ninth month. However, there are drives that
spoil the floppy. Not information such as a floppy disk. In
this case, with a floppy disk, you can work as a valuable, but
it has to lose, so to speak, "marketable." It is a tin cover
(see Figure 1) that some drives manage to evert,
3,5 "floppy
then remains
\ It is only
/ \ \ Tear and vyki
\ Nut. I hope
that your drive
February 1 will not require
\ \ You just for the sake of
locally Days
ting. But here you are,
Finally, acquires
religious drive.
Legitimate question:
where to? First
of pitch
inside
(Or outside ...)
rack. One
resistant, for example,
April 3 measures can explosion
/ \ Lyatsya one
Rack your fifth
tidyuymovogo Thesis
kovoda. Mounted
Fig.1 drive to stop
kam six M3 screws through the simple
goals. Just before you install, look for a jumper
drive: they must be installed in
according to the selected mode of operation.
May, however, appear that any jumpers on the drive there (like
me). Here enters into force the following statement: this drive
will be on the Spectrum as a "B", and the PC - as "A". This
they feature ...
Connection
But here you have installed the drive on the racks
and now it must be connected. First connect the "nutritious"
wire. Drive uses only 5 volts, so that Energy saving is
obvious. The power connector can be asked in the market. Used
the four "mother", pinout shown in Figure 2. Shield wire is not
required.
BOTTOM PLATE DRIVE
top
bottom
33 ................. 1 .... - Food
34 ................. 2
general
data 34 pin +5 V
odd number - total
even number
Figure 2
We now proceed to the terminal data. Used 34-pin female (on
the drive - "Dad"). The market is full of such. Buy the best
connections with two zamkamisamye reliable from all I know. Now
pinout conclusions. According to the standard signals of all
the findings in full compliance signals are "pyatidyuymovok,"
but because Connector "bumps" in your diskovodnuyu cable feed
(loop) is similar as in connected "pyatidyuymovki. I urge you to
the utmost caution: confusing the first
Pin and tape, you can not
secondary "embed" connector at the same place, and
tape, not all can boast of its
long. "Embedding" should be very careful, pressing the cable
conductor first castle. It is desirable to use small tisochki,
extending the width of the sponge to plug what some planks. If
the grip you have not found, try to put a lock can be more
evenly distributed, because if you lower edge of the castle is
too low, and the middle but will be considerably elevated, the
just in the middle of the castle and can break. Can he break
down and in one of the eyelets. Once you've done this, you can
turn off one side of the tape over the lock, and all this lay
the second lock. This second lock "keeps" the first
since he could easily come off the connector without the safety
net the second.
Connect the connectors to the drive for
power is off. Sequence
Connection terminals plays no role. Remove the resistor matrix
with its five inch floppy disk (the matrix is
below, near the place where the dress connector, and looks like
a chip; Of course, she is inserted in the socket). Now turn on
the machine.
If the LED treatment of burns and does not go off, even if it
- a floppy disk, then something You nahimichili ...
If you do nothing - no emotion
handling or reset (to Scorpion'ah)
then check which way you connect to a tape drive or track
circuit supply.
If you could do it right the first time - it remains only to
congratulate ... ;)
"Podmenitel" drives
I want to say that if you
3,5 "connected as" B ", and you want to run with him the
program, you will undoubtedly encounter some difficulties on
the following: a TR-DOSe required to give the command: * "B"
<enter>, RUN <enter>. It takes time, and sometimes because
every second counts registered ... In addition, not all programs
running from the disc "B", continue with it
work. Yes another Scorpion'e if you
go into DOS with a blank drive "A", then
meet with great braking system. So I made myself some things,
which may swap drives "A"
and "B". Schematic and wiring electrical circuits are shown in
Figure 3. As the switch is used beloved Dip type OSMT3
two-piece for two positions.
"PODMENITEL" floppy drive
The schematic circuit diagram
board to toggle / fee after
/ Tumbler
drive "A" /
to the pin. 12
/ Data
/
drive "B" / a pin. 10
Data
Electrical circuit assembly
drive "A" \ / to the pin. 10
\
drive "B" / \ to the pin. 12
1 2 3
Fig.3
Of the schemes you might guess that
the controller board connector must be cut before the two
signals - "the choice of drive "A" and "drive select" B ", and
in the resulting gap solder wire MGTF-0, 3 (Or, indeed, any
other, though coaxial) switch, all of the body of the car.
Initial conclusions toggle vpaivaivayutsya before the break,
and the third - after the break front jack. To toggle crosswise
should be propayany second and third conclusions, as shown in
wiring diagram. All conclusions should be isolated from each
other. Add more owners Scorpion'ov,
that they can use on the assembly field (if it does not employ
this time) such kontaktiki that are used in PC board for
interfacing with external cables. If the length of the wires to
the switch exceeded one hundred millimeters, it must be on the
external screen the noise.
Selecting disks
Now back to Figure 1 to understand the device and the floppy
drive principle of information processing. Standard on Floppy
3,5 "provides a tin cover item 1, which protects the window
data disk from dust and mechanical particles that can damage
magnetic layer disc. The cover should easily move over to the
left and resilience to distance not less than ten millimeters
from the original position, as well as with just as easily fall
back to the right in original state by the spring.
Insert the diskette in the drive should be just ahead of the
lid, while on the body on the left should be depicted relief
"Arrow" (position 2). By the way, otherwise you will not be
able to insert it, no matter how cool ... But experiment is not
worth it. Kinematics drive is set up so that when the disk is
in drive, the cover is removed at a certain distance, and then
as a floppy disk to "falls" down drive. Everything! Forget
about your favorite castle Your faithful pyatidyuymovki (of
course, for trehdyuymovki). Now, to get back to a floppy disk,
simply click on this rectangular button at the bottom right (if,
Of course, you've installed the drive, so that
LED located on the bottom left). Do not forget to draw back the
hand of time: you can get seriously injured wrist wildly sprung
disk (I'm suddenly thought: why am I writing all this, because
times have you wanted to 3,5 ", you probably know how to use it
yourself lead. Although ...:).
A few words about indexing the beginning
disc. On a floppy disk you will not find any
index holes. Only turning the disk upside down, you'll notice
that in Slave of the disc except Center hole there is another.
And that's what it is: when you insert a floppy in the drive
and if the the power is on, the servo drive makes a few turns
to find himself leading this pin holes. Status pin on the
engine in strict conformity with the presence of the switch
capacitance sensor under the engine. Such is the indexing of ...
Now let's talk about the windows (not on Windows'
95:).
Write protect window (position 3). Unlike
5.25 "defense record is not defined
your wealth in the region "serebryashek.
Protection of records can be easily installed
at any time, except, of course, that
moment when the diskette in the drive. Similarly, with the same
ease protection can be removed. This is done a little
slider in the window, which is installed
two fixed positions:
Write Enable / Write Protect
or
Write position / Protected position,
which respectively mean:
entry is permitted / prohibited entry.
So what's the problem with writing permitted
more civilized than the "five inch
my sister. "Though not devoid of such a system and a lack of:
recording is prohibited, unless transparent window, and vice
versa, if not transparent. Right kind of American system. I did
some time to confuse these safe mode, from which washed three
diskettes 3.5 "and one 5.25". In fact, just remember: on the
labels to floppy disks is Such phrases, which I described above.
Label, by the way, too, are glued to the magic: the part below
(where the word), and the rest - from the top.
On a floppy disk 3.5 "can be written as 800 kilobytes of bare
byte (iS-DOS), and 1.44 megabytes (the rest for PC). But you
Speccy Oblomov 2HD. Not with a diskette, nothing to do with the
drive, nothing to do with DOS. What where? KR1818VG93
controller. He can not wind on one track with more than six
half of kilobytes. I tried to write a driver in the iS-DOS'ke,
but only time spent in vain. And what is achieved in MS-DOS,
this is the most 2HD? Yes, just only half compressed data
density per track: instead of nine sectors of 512 kilobytes
written eighteen. And so on Speccy window
pos.4 should always be kept closed.
Write a record, but did not find. So
that did not take the opportunity 1.44
succeed. Close the window can be any solid object, the
transparency does not matter: the mechanical sensors. Can
window just stick up "serebryashkoy, and can
before installing the drive solder contact sensors, or solder,
and something lock them in a closed state.
I will say that the PC system understands any type of writing:
that 2HD, that 2DD - without difference (the difference is in
the tank). But the format drives for MS-DOS is best to Speccy.
Now let's talk about the sorts of floppy disks. Best in the
world, in my opinion, the 3M (USA). Currently, though I rarely
buy them, but a friend's birthday - a great gift. Verbatim with
Teflon coating, I do not take it, because I do not work in
hostile chemical environments, and Teflon can just make notes
directly on the disc with a ballpoint pen. And after such an
ordeal disk continues to properly serve its lean to the owner.
BASF, TDK - better buy audio tapes of the same name. But on
World markets extend domestic floppy - RAD. I do not understand
this abbreviation, but I liked them because of price and
quality (I've got a few discs
iS-DOS - until cool, and "no new
hole! ":). Make them in St. Petersburg from the Japanese
and American components. Nowhere, except
how to market, I have not seen them, and this means that disk
are only for export. In the market for a year now hangs a
signboard, which is the sale of these disks with huge
discounts. Just recently (today) bought two more packs ...
Maxell - it's the batteries are ... MMC - cheaper than all at
light, so - bad. NoName - never hold. They are even cheaper
than MMC, but they can be written once in a lifetime.
The second will not. Yet there are floppy disks, have
which simply does not exist window
position 4. These diskettes initially wondered how 2DD, and
such a floppy disk used on your drive with other drives may be
incompatible, so choose the type of floppy disk, regardless on
the density of records in accordance with the drive.
Advantages and disadvantages of 3,5 "
Let's start with the disadvantages. On the copyright
turbozagruzchikah immediately affects some lateness tone after
step block of magnetic heads. Simply put, there are no
differences between retrievals BASIC-large file with DOS and
games "UFO-2" package "ZxWord-128" - speed
download the same. Several noisy moving block of magnetic heads
(at least for me). However, this does not
detract from the merits of the drive:
absolutely not audible, as it rotates
disk, and rotates if he did. Error
reader / writer can wait for years, intensive chasing head on
the tracks. No problems with the clamp (oh, where is it on
MS5313 !..). Floppy disk can now be run in a mate, while fellow
ohnet and floppy disk - not:).
But what do you do if suddenly, after some time, a working
manual drive suddenly refused to work? This means that it is
time to repair, but that's a topic for another article ...
__________________________
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Iron - Disk drive 3.5. From purchase to maintenance: the selection and installation,
connection podmenitel drives, floppy disks choice, the advantages and disadvantages 3.5.
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