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Author Topic: 2nd internal floppy in a 2000  (Read 4929 times)

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Offline 23703jimTopic starter

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2nd internal floppy in a 2000
« on: July 03, 2009, 07:40:12 PM »
HELP

i am installing a 2nd Chinon 354 in my 2000 the ist 354 is set to DFO the second one is set to DF1. i have jumper 301 closed (2 floppies in system).

i have a floppy ribbon cable without a twist? i tried that and the second floppy red light stays on and the machine does not see it.
i am sssuming that i need a ribbon cable with a twist is that correct????if not what am i doing wrong> thanks and regards

james portsmouth va
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Offline orange

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Re: 2nd internal floppy in a 2000
« Reply #1 on: July 03, 2009, 07:41:43 PM »
edit (sorry, misread)

IIRC, the LED constantly on sometimes indicates the connector is turned upside down.
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Offline 23703jimTopic starter

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Re: 2nd internal floppy in a 2000
« Reply #2 on: July 03, 2009, 08:08:12 PM »
the number one pin is to the far left of the power cable. thats where the red side of the ribbon cable is. same as on the ist drive it sees the first drive.
« Last Edit: July 03, 2009, 08:19:58 PM by 23703jim »
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Offline save2600

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Re: 2nd internal floppy in a 2000
« Reply #3 on: July 03, 2009, 10:59:47 PM »
You may have a bad drive if the jumper settings are correct and the OS is not
recognising it. Perhaps a bad CIA? The tiny microswitch that determines when a
disk has been inserted may need to be cleaned or replaced too.

If you get pin one confused with the last pin, that can result in the Amiga not booting
at all.

Oh and all the floppy cables I have ever seen on an Amiga do NOT have a twist in them.
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Offline Nostalgiac

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Re: 2nd internal floppy in a 2000
« Reply #4 on: July 03, 2009, 11:37:05 PM »
Quote from: save2600;514422
Oh and all the floppy cables I have ever seen on an Amiga do NOT have a twist in them.


mine does...

twist + jumper 301 closed == 2nd DD drive
twist + jumper 301 open == 2nd HD drive

I had both... and working fine

Tom UK
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Offline save2600

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Re: 2nd internal floppy in a 2000
« Reply #5 on: July 04, 2009, 12:14:45 AM »
Quote from: Nostalgiac;514426
mine does...

twist + jumper 301 closed == 2nd DD drive
twist + jumper 301 open == 2nd HD drive

I had both... and working fine

Tom UK

Doh! Misspoke here I guess. So the twist is in regards to a HD drive?? Sorry, I don't have
enough experience with Amiga and HD drives. I was under the assumption we were talking
about DD. Thought the 354 was DD and the 357 was HD.

Looking into this, there's (seemingly) tiny differences between these things. If you have
a 6-pin jumper block on the back and for it to work on an Amiga, you must short pins 3 & 5...
« Last Edit: July 04, 2009, 12:27:29 AM by save2600 »
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Offline nishtek

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Re: 2nd internal floppy in a 2000
« Reply #6 on: July 04, 2009, 12:37:16 AM »
Quote from: 23703jim;514402
HELP

i am installing a 2nd Chinon 354 in my 2000 the ist 354 is set to DFO the second one is set to DF1. i have jumper 301 closed (2 floppies in system).

i have a floppy ribbon cable without a twist? i tried that and the second floppy red light stays on and the machine does not see it.
i am sssuming that i need a ribbon cable with a twist is that correct????if not what am i doing wrong> thanks and regards

james portsmouth va

James,
1st connector (one on end) has a twist (but not like the PC cable).  Photo of Amiga floppy cable.

DF0 goes at the end, DF1 in the middle (no twist there).  If you need to buy such cable we can provide one.
J301 on motherboard should be on, when adding a second internal drive (open/off when no 2nd drive).
Leaving the jumper open prevents the Amiga from seeing the ID (0,1) sequence.  ensure you connect the cable properly (if not properly connected, drive light stays on).
hope this helps.
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Offline nishtek

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Re: 2nd internal floppy in a 2000
« Reply #7 on: July 04, 2009, 12:47:15 AM »
@Nostalgic

I also confirm this. :-)
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Offline 23703jimTopic starter

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Re: 2nd internal floppy in a 2000
« Reply #8 on: July 04, 2009, 02:29:54 AM »
nishtek
may i ask the price for the floppy cable you mentioned the one with the twist. thanks much . james portsmouth va
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Offline nishtek

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Re: 2nd internal floppy in a 2000
« Reply #9 on: July 04, 2009, 03:00:39 AM »
pm send.
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Offline Jope

Re: 2nd internal floppy in a 2000
« Reply #10 on: July 04, 2009, 08:33:42 AM »
A floppy cable twisted like that (4-6) actually does not affect the drive ID in any way. The twist is only there so that the drive LEDs don't both light up at the same time.

The jumpers behind the drives determine which one is DF0 and DF1.
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Offline Amiga4k

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Re: 2nd internal floppy in a 2000
« Reply #11 on: July 06, 2009, 12:18:35 AM »
Source: National Amiga Technical 4/2000
Amiga 2/3/4000's Regarding Their Internal Floppy Drives

For DF0: the device number must be set to DS0 on the drive and this must have the cable with the twist(4-6) in it.

For DF1: the drive number must be set to DS1 on the drive and this must have the section of cable that is not twisted.

If you have a DF1: in the machine you need to set these jumpers:

    * Amiga 2000 J301 must be on.
    * Amiga 3000D J351 must be shorted between 1-2.
    * Amiga 3000T J351 must be shorted between 1-2.
    * Amiga 4000:
      DF1: ENABLE (J351)    enable 2nd internal floppy (880 KB) as DF1:    closed
      DF1: ENABLE (J351)    no 2nd internal floppy, or 1.76MB floppy as DF1:    open




A2000 ---- jumper J301
Motherboard, cable,DF1 drive(set as DS1), cable with twist 4-6, DF0 (set as DS0).
 
- - x
- - x    DS1 or DF1

- x -
- x -   DS0 or DF0
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Offline 23703jimTopic starter

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Re: 2nd internal floppy in a 2000
« Reply #12 on: July 07, 2009, 12:17:18 PM »
after all the replies i get from no a cable with a twist is not necessary to one i got that said i needed a "special twist cable". i got both drives working o.k. i went to my local pc shop and bought a short ribbon with a twist a pc cable not a special cable. came home plugged in the twist cable and IT WORKED. worked fine. thanks for all your help

james
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Offline terminator4

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Re: 2nd internal floppy in a 2000
« Reply #13 on: July 08, 2009, 03:11:31 AM »
@23703jim

Thats great, you found a PC cable (Amiga follows Shugart standard vs PC doesn't something to keep in mind).  I think you will find your one drive when accessed showing LED and the other drive 's LED showing access too (even if not accessed), if not properly twisted.   Which is what Jope said.
Here's what PC does: http://www.pcguide.com/ref/fdd/confCable-c.html
But you can modify the cable twist.  This is easy enough to do. Put the twist just before the end connector. Pin 4 connects to pin 6 on the connector, and pin 6 connects to pin 4 on the connector. pin 5 is connected to pin 5. (pin 1 is the one with the red cable)
Pin 4 is motor control on DF1 , pin 6 is "/INUSE" per link below.
Don't underestimate the free advice you get from amiga.org community.   Being ungreatful is being shameful.  Why ask, should have tried things yourself, lots of individuals devote their free time to this forum you know.
pintouts:
http://pinouts.ru/Storage/InternalDisk_pinout.shtml
« Last Edit: July 08, 2009, 03:41:35 AM by terminator4 »
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