Beiträge von Parser im Thema „TEAC 5.25" Floppy FD-55GFR 142-U default Jumperung ?“

    Wenn ein Laufwerk eine Diskette nicht formatieren möchte ... alles andere als technisch OK vorausgesetzt ... liegt es am Medium, sprich der Diskette.

    Meine Erfahrung ... habe da auch in seltenen Fällen *Meinungsverschiedenheiten* mit meinem 386er nebst 5.25" Laufwerk bei 360KB Formatierungen... dann wird halt eine frische, unformatierte Diskette genommen ... und die Parameter /4 /U.

    P.S.: Da ich viel mit C64 Disketten mache, hilft nibwrite -u1 ... komplettes *unformat* auch manchmal Wunder.

    "All (most?) Teac FDDs can be jumpered to automatic 300/360 mode by setting the »I« jumper. To decouple the drive from the »Density Select« bus line, pin No. 2 of the bus connector needs to be isolated with some adhesive tape. Since bus line No. 4 is not used in general and since bus lines 1 and 3 are grounded as all other odd numbered pins, all pins numbered 1 to 4 can be taped, which is much easier to do. Now the drive constantly spins at 360 rpm again, which can be fixed by additionally applying the »LG« jumper. This jumper inverts the behaviour of the »Density Select« line and ensures that the drive constantly spins at 300 rpm."

    "Applying a switch to manually select between 300 rpm and 360 rpm:

    If you want to use your 5,25" disk drive not only for Disk2FDI, but also to handle PC formatted disks the usual way, it may be useful to add a little switch. Then you can manually select between both rotation speeds of 300 rpm (Disk2FDI usage) and 360 rpm (accessing standard disks).

    To accomplish this task, simply replace the »LG« jumper by your switch (via a wired pinhead connector). Take note that all other settings (bus line 2 isolation and »I« setting) must remain intact when the switch is applied."

    Der verwendete Floppy Controller muss auch 360KB Laufwerke unterstützen.

    Leider funktioniert das Laufwerk nach wie vor nicht. Bei einem Zugriffsversuch kommt jetzt "not ready". Wenn ich den Jumper von RY und DC umstecke, kommt "general failure reading drive B". Ich hatte zwischenzeitlich auch mal die Laufwerksplatine abgeschraubt, um mir die Unterseite anzuschauen. Dabei habe ich gesehen, dass mittels der Langlöcher für die Platinenbefestigung auch die Position einer Lichtschranke auf der Platine bestimmt wird, wohl für die Spur null Einstellung ? Vielleicht liegt das Problem ja daran, da muss ich nochmal in die Anleitung schauen.

    Grüße,

    Ralf

    Habe dir mal das Maintenance Manual angehängt ... [.txt] löschen & dann zusammen entzippen in ein .pdf.

    Bitte melde dich an, um diesen Link zu sehen.

    This data refers only to the FD-55GFR-149U. There is also a -140 which

    looks the same and has the same layout. Perhaps it is basically the

    same drive and this data applies to that one as well.

    D0, D1, D2, D3 These give the drive address in a daisy chain

    configuration.

    U0, U1 Used to select turn-on condition of front bezel light (see

    below).

    IU Jumper to make the signal interface terminal 4 be used

    for the IN-USE input signal. When strap is removed, the

    input circuit is open and the IN-USE signal ineffective.

    ML Selects spindle action according to host command. When

    open, spindle rotates only by MOTOR ON input signal. When

    jumper is ON motor rotates when (a) MOTOR ON input signal

    is TRUE (b) front bezel indicator turns on.

    RY/DC Used to select function of READY/DISK CHANGE signal on

    terminal 34. When RY jumper ON signal on terminal 34 functions

    as ready signal, and it functions as DISK CHANGE signal when

    the DC jumper is ON.

    LG Used to select meaning of HIGH/NORMAL DENSITY input

    signal. When on, LOW level of HIGH/NORMAL DENSITY signals

    high density mode. When off, LOW level of HIGH/NORMAL DENSITY

    signal designates normal density mode.

    I and IS Used to select speed of drive. I strap on: dual speed mode

    designated. (360 rpm High Density, 300 rpm Low Density).

    Ready state reset once synchronising with a level change of

    the HIGH/NORMAL DENSITY signal. Both I and IS OFF, single

    speed mode designated. Speed is 360 rpm regardless of

    HIGH/NORMAL DENSITY signal. Both I and IS on, dual speed

    mode is activated but FDD remains in ready state, regardless of

    level change of HIGH/NORMAL DENSITY signal.

    E2 Selects output condition of INDEX and READ DATA pulses.When

    OFF

    pulses are ouput as in (DIAGRAM NOT SUPPLIED). When ON, output

    conditions changed to logical expression as follows:

    INDEX: Index hole detection * DRIVE SELECT * Ready state

    READ DATA: Read data detection * DRIVE SELECT * Ready State

    ---------------------

    * Write operation

    FG Connects FDD frame to DC 0V.


    Front Bezel Indicator

    Selection Jumper Combo. Indicator turn-on condition

    1 * * * Drive select

    2 IU * U1 Drive select + in-use

    3 IU U0 * In use

    4 * U0 U1 Drive select + ready

    5 IU U0 U1 In use + (drive select * ready)

    Notes

    Selection

    1 Indicator tuns on when DRIVE SELECT signal TRUE

    2 Indicator turns on while DRIVE SELECT signal is TRUE or IN USE signal TRUE

    3 Indicator on while IN USE signal TRUE

    4 Indicator on when DRIVE SELECT signal TRUE and FDD in ready state.

    5 Indicator turns on, on conditions 3 or 4


    I do not know what the default settings are meant to be.

    Mine are FG, D1 and DC jumpered.

    On the 3COM web site they make a technical note about these drives (in

    document 0000526B) and say D0, I, RY and D3 should be jumpered. (No, I

    don't know the significance of jumpering *2* drive address selections.

    It does not seem logical.)

    Floppy Disk Controller IDC-34 Male

    pin assignment pin assignment

    1 GND 2 Density Select

    3 GND 4 (reserved)

    5 GND 6 (reserved)

    7 GND 8 Index

    9 GND 10 Motor Enable A

    11 GND 12 Drive Sel B

    13 GND 14 Drive Sel A

    15 GND 16 Motor Enable B

    17 GND 18 Direction

    19 GND 20 Step

    21 GND 22 Write Data

    23 GND 24 Floppy Write Enable

    25 GND 26 Track 0

    27 GND 28 Write Protect

    29 GND 30 Read Data

    31 GND 32 Head Select

    33 GND 34 Disk Change


    IBM DISK STANDARD CONFIGURATIONS

    --------------------------------

    Bytes Sectors

    per sector Disk Type per Side Sides Tracks

    ---------- ----------- -------- ----- ------

    512 180K 5-1/4" 8 or 9 1 0 - 39

    512 360K 5-1/4" 9 2 0 - 39

    512 800K 5-1/4" 9 2 0 - 79

    512 1.2M 5-1/4" 15 2 0 - 79

    512 720K 3-1/2" 9 2 0 - 79

    512 1.44M 3-1/2" 18 2 0 - 79

    P.S.: Einfach auch mal googlen nach dem Maintenance Manual für die FD-55 Serie ... 217 Seiten ... :schreck!:. :)