Help me connect a 5.25 floppy drive to my PC
ZXNet echo conference «hardware.zx»
Hello nixdorf2005
I made a cable, connected it, nothing works. Should the computer detect
this drive? Doesn't define it for me.
Hello, dear
yes and people his in bivis exposed?
of course if it has branded IBM then it is optional
and in rare cases.....
Hello Shadow Maker
Sha> Why do you need jumpers, you can Swap floppy drives in the BIOS
Sha> do.
Sha>
Because pisyukans often don’t even realize
To what extent they have done everything through ()(), in a pussy.
All computers (not to be confused with pussies) provide
that up to 4 drives can be connected to one bus (loop).
And there are 4 signals to select each of them: A, B, C, D.
In the pussy, in order to do everything through ()(), they did
this too is incompatible. There are two drive selection signals,
and a twisted train! Whether drive A or B is determined
its position on the cable - before or after twisting.
As a result, a normal disk drive for connecting to a computer
have to put it as B:. But that's half the trouble. The point is that
it doesn’t understand 5.25 for 80-track bios. And everything that works
It breaks down through the BIOS. As a result, either look for the 800.com driver, or
use the appropriate software. But that’s not all.
He still doesn’t have disks formatted in Spectrum format.
can read in the area of the first sector - incompatibility on
controller level! You can partially seal the disc (index hole),
you can play tricks with the position of the sensor in the drive
(move closer to the muzzle), you can try different drives,
you can format it on the PC, you can try special software(but the probability of reading it is 50%).
Hello fk0
fk0> It still cannot drive disks formatted in the Spectrum format
fk0> read in the area of the first sector - incompatibility on
fk0> controller level!
Did you mean formatted with the hole-in-the-wall FORMAT? So who cares?
If you're in your right mind, it'll be formatted =)
Hello nixdorf2005
nix> I made a cable, connected it, nothing works. Should the computer
nix> define this drive? Doesn't define it for me.
First of all, what do you mean it doesn't work?
If there is only one drive, then it should be installed as A:.
To do this, the device selection jumper on the drive board must be in
position DS0 (DS1 -> B:. ).
If you use a cable from IBM, then you need to connect to the connector that
installed before twisting.
If you connect the drive to the connector installed after twisting, then
switches are swapped.
In this case DS0 -> B:, DS1 -> A:.
If the controller is working properly, then when installing a working, formatted floppy disk
into the drive, and executing, for example, the LIST command, the LED on the drive panel
should light up, and a list of files recorded on the screen should appear on the screen.
floppy disk
Hello, CHRV
CHR> Realists :)
Realists in their right mind will launch FUT, or, as a last resort, step on Magic and
They rummage through the menus of the shadow market - there is also a format file there somewhere. Another format
available in CC...
Hello, lvd
lvd> Did you mean, formatted with holey FORMAT? So who?
lvd> in their right mind they will format it =)
Realists :)
Hello,geners
gen> to iceberg 800.com is a proto-readable format extension driver
I don’t argue, I only disagree with this “and 800.com is needed for the disk format
360 by 500 and 720x reading on 1.2" drives.
Hello,geners
gen> 80 track Beavis discs are normally understood, but 800.com is needed for
gen> 360x500 disk format and 720x reading on 1.2 drives
All my life I thought that the IBM PC also used DS DD disks (yep, they are 720KB), but
800.com was invented for the same purpose as on the Spectrum instead of 2554 sectors
2560 comes out. As I remember right now, EC-1842 and Alpha-DOS: rolleyes:
Hello Conan
then CONAN? and people apparently re-read the literature about HT and other crap (in
This case is applicable from the perspective of this problem)
Beavis understands 80 track discs normally, but 800.com is needed for the format
360x500 disks and 720x reading on 1.2 drives
regarding incompatibility at the controller level - man, what kind of disk drive do you have?
spec - not on VG by chance, right ???? and you won't find it strange that
for example, on the Soviet IBM SEARCH the drive controller was installed, and SEARCH
understood IBM floppy disks perfectly
Hello icebear
to iceberg 800.com is a proto driver for expanding readable formats
from domestic, I could of course be wrong, but it was 1700.com
The functionality is the same, only the 1700 format has been added; in general, both drivers are needed for
increasing the capacity of floppy disks and reading “non-standard formats”
Hello fk0
fk0> All computers (not to be confused with pussies) are provided with
fk0> that up to 4 drives can be connected to one bus (loop).
fk0> And there are 4 signals to select each of them: A, B, C, D.
fk0> In pussy, in order to do everything through ()(), they did
fk0> this is also incompatible.
May I ask where such insightful information came from?
Maybe, to complete the picture, let's remember that the first floppy disk drive was
developed in 1967 by Alan Shugart, then working at IBM.
And the first format (8F) of a floppy disk was proposed by David Noble,
who also worked for IBM.
Next Anan Shugart left IBM in 1969 and started his own company
(Shugart Associates), which launched the first
five-inch drives (5 1/4'). Disk drives have become popular due to the rapid
development of the personal computer market, even before the launch of the IBM PC.
By the way, Shugart Associates developed the Shugart Associates System
Interface (SASI), which was then renamed small computer system interface
(SCSI) and which then became the industry ANSI standard.
As for IBM, the decision to limit itself to two disk drives was quitelogical: there was no room in the case (disk drives were then double height). Besides
the same situation when you need to use more than two identical drives,
quite rare. 3 1/2' drives developed by Sony (1983) became
used in IBM personal computers only since 1986.
As for the "twisted" disk drive cable in IBM, the reason is also
surfaces: imagine that you need to drives A and B (for example, for
boot from another drive). If you are using a disk drive
cable, then to do this you only need to rearrange the connectors. And if the train
standard, then you need to remove the drive, find the necessary jumpers, and rearrange them
and put everything back together again. In addition, different drive manufacturers came up with
own arrangement of jumpers and switches. Changing the drive
turned into solving a puzzle.
And one more important point has been successfully : the Motor ON signal, look at
differences:
Industry-Standard Shugart Floppy Drive Interface
Pin Signal
10 Drive Select 0 A
12 Drive Select 1 B
14 Drive Select 2 C
16 Motor-On (all drives)
IBM's Modified Shugart Floppy Controller Interface
Pin Signal
10 Motor-On 0 A
12 Drive Select 1 B
14 Drive Select 0 A
16 Motor-On 1 B
In the industry standard, the drive motor startup was selected by one line
(16). This meant that if the drive's internal logic did not useengine start signal Drive Select (which was the case with many drives at first),
then when accessing any of the drives, the motors will spin on all
at the same time. IBM solved this problem by adding a Motor-On signal for each
drive.
fk0> The fact is that it does not understand 5.25 80-track bios.
And the controller somehow understands which drive is connected to it.
three-inch? Or is it with 3 1/2' at the BIOS level with only 40 tracks
does it work? Or maybe the point is that the IBM standard is 5 1/4' 720K
it just wasn't there?
fk0> But that’s not all. He also has disks formatted with Spectrum
fk0> format cannot read in the area of the first sector --
fk0> incompatibility at the controller level!
You can find out more about what is going on
speech?
Hello caro
car> To work in Spectrum (720 kb) they must be closed, to work in IBM
car> (1.2 MB) open.
Kamil, in light of all of the above, could YOU redo your diagram?
- make 2 options for each model, so to speak - location of jumpers for
ZX and for IBM.
Hello Striker
Str> Kamil, in light of all the above, could YOU provide your diagram
Str> remake - make 2 options for each model, so to speak -
Str> location of jumpers for ZX and for IBM.
I support. It will be much more convenient this way.