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Software News   Software News : ADFRead 1.0
   posted by AmigaBlitter on 19-Apr-2006 9:59:14 (5749 reads)
Adfread will allow you to create ADF floppy disk images from regular
Amiga disks using standard PC hardware.

http://www.winuae.net/

    

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ErikBauer 
Re: ADFRead 1.0
Posted on 19-Apr-2006 10:13:28
#1 ]
Super Member
Joined: 25-Feb-2004
Posts: 1140
From: Italy

I tought it was just impossible?


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NutsAboutAmiga 
Re: ADFRead 1.0
Posted on 19-Apr-2006 10:17:43
#2 ]
Elite Member
Joined: 9-Jun-2004
Posts: 12101
From: Norway

I did know of a old tool for MSDOS that did this, now it can be done in windows XP/2000 that news to me.

The key to getting this to work is two floppy drives connected, so the floppy drive can be tricked


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afxgroup 
Re: ADFRead 1.0
Posted on 19-Apr-2006 10:34:34
#3 ]
Super Member
Joined: 8-Mar-2004
Posts: 1968
From: Taranto, Italy

this is strange..


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elwood 
Re: ADFRead 1.0
Posted on 19-Apr-2006 11:24:12
#4 ]
Elite Member
Joined: 17-Sep-2003
Posts: 3427
From: Lyon, France

Hmmm...

Last edited by elwood on 14-May-2006 at 03:53 PM.
Last edited by elwood on 19-Apr-2006 at 07:27 PM.


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Foody 
Re: ADFRead 1.0
Posted on 19-Apr-2006 12:05:25
#5 ]
Super Member
Joined: 3-Sep-2003
Posts: 1467
From: Canada

Wether the impossible became possible that is not the point, let us all go woohoo!! But to me it is useless, at least it is an option for someone who might find more use to it than me.

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mailman 
Re: ADFRead 1.0
Posted on 19-Apr-2006 12:20:39
#6 ]
Regular Member
Joined: 23-Nov-2003
Posts: 260
From: Poland

That news item is a bit misleading because it is not as simple as it might look like and your confusion is understandable. ADFRead can create ADF image from Amiga disk but there are some restrictions and limitations. First, you need two floppy disk drives on one cable and they can not be USB FDD. Second thing, it is impossible to do anything with protected disks.

Last edited by mailman on 19-Apr-2006 at 06:00 PM.

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AmigaOneProductions 
Re: ADFRead 1.0
Posted on 19-Apr-2006 12:37:44
#7 ]
Cult Member
Joined: 11-Jan-2006
Posts: 717
From: Ingle land

I don't quite get why you need the second floppy drive, if you are reading from an Amiga Floppy Disk and creating an ADF file, why can that file not be saved to hard drive, personally, the way I read Amiga Floppies is to but the disk in my A1200, read the contents and then transfer what I need over the network to my A1 (And as both the A1 and the A1200 are in the same case, this is quite convenient)

This obvious question to me now is:

Can the same methods be used to read an Amiga Floppy in the A1's floppy drive, The A1 uses standard PC drives, and a PC style controller, so this should theoretically be possible ?


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xeron 
Re: ADFRead 1.0
Posted on 19-Apr-2006 13:00:47
#8 ]
Elite Member
Joined: 22-Jun-2003
Posts: 2440
From: Weston-Super-Mare, Somerset, England, UK, Europe, Earth, The Milky Way, The Universe

Basically, this is a Windows tool that does what Disk2FDI did under DOS.

The two drives are required because the only way to trick the standard PC floppy controller to read Amiga formatted disks is to switch drives in the middle of a read. IE have both drives spinning and change the drive select register at strategic times.

Its a big hairy hack.


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TrebleSix 
Re: ADFRead 1.0
Posted on 19-Apr-2006 13:35:58
#9 ]
Elite Member
Joined: 6-Sep-2004
Posts: 3747
From: Pembrokeshire, Wales

even though its a hack, its a good way forward. hopefully it will keep getting updated!


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dreamlandfantasy 
Re: ADFRead 1.0
Posted on 19-Apr-2006 14:45:04
#10 ]
Regular Member
Joined: 17-Mar-2004
Posts: 418
From: Glasgow, UK

I remember an old DOS program called Transcopy (?) that allowed you to copy Amiga formatted disks (amongst others), even some that had copy protection. It was a VERY powerful utility.

Kind regards,

Francis.


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NutsAboutAmiga 
Re: ADFRead 1.0
Posted on 19-Apr-2006 15:59:34
#11 ]
Elite Member
Joined: 9-Jun-2004
Posts: 12101
From: Norway

@AmigaOneProductions

On AmigaOS4 you can use cwfloppy kernel module port found on OS4Depot to read and write ADF from / to floppy disks


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WOSPUPOS4 
Re: ADFRead 1.0
Posted on 19-Apr-2006 16:57:08
#12 ]
Regular Member
Joined: 24-Feb-2006
Posts: 220
From: Unknown

@NutsAboutAmiga
But then you still need a catwheasel.

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Varthall 
Re: ADFRead 1.0
Posted on 19-Apr-2006 18:17:26
#13 ]
Super Member
Joined: 17-Feb-2004
Posts: 1555
From: Up Rough

Quote:
Can the same methods be used to read an Amiga Floppy in the A1's floppy drive, The A1 uses standard PC drives, and a PC style controller, so this should theoretically be possible ?

I've done a bit of investigation: ADFRead source code is included in the archive, and it is based on fdrawcmd library from the open source fdutils package, which provides low level floppy drive access for computers using an uPD765a floppy controller. If the A1 uses this chip, then I guess that both fdrawcmd and ADFRead could be ported.

Varthall


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alx 
Re: ADFRead 1.0
Posted on 19-Apr-2006 20:12:24
#14 ]
Super Member
Joined: 7-Mar-2003
Posts: 1224
From: Midlands, UK

At last

I've used Disk2FDI before, but since upgrading from ME to XP it was an absolute pain having to reboot with a startup floppy to DOS - this should make things a lot easier.


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niceguy1979 
Re: ADFRead 1.0
Posted on 19-Apr-2006 22:23:35
#15 ]
Regular Member
Joined: 24-Feb-2004
Posts: 277
From: Coventry, Midlands, UK

yeah, i investigated this a little while ago. Hardware wise I thought you needed a catweasel to read the format of the Amiga disks on a PC. If this does work then it saves me from buying a catweasel which is pretty cool as I'm broke.

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sg2 
Re: ADFRead 1.0
Posted on 19-Apr-2006 22:47:04
#16 ]
Regular Member
Joined: 16-Jun-2004
Posts: 223
From: Lyon, France

The UPD765A is the classic floppy controller chip ; it is present as a 765 chip in no machine today, it is always a hardware emulation of that chip in the southbridge. The VIA has this, and the trick *can* be done on A1. I may release that some day (if noone beats me to it - and i'm NOT in a hurry :).

Regards,
--
Stéphane

Last edited by sg2 on 19-Apr-2006 at 10:48 PM.

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Samwel 
Re: ADFRead 1.0
Posted on 21-Apr-2006 0:12:28
#17 ]
Elite Member
Joined: 7-Apr-2004
Posts: 3404
From: Sweden

But why can't you just read the actual data of a disk bit by bit and then when in memory manage it? Why does it matter at which speed the drive spins??

I mean we know the way Amiga disks worked and we have the filesystem so it
should be possible to read the data of a disk and put it on harddrive IMO.

I know it's very hard to do support for actual usage of Amiga disks in PC drives
real time. But we only want to take the data off the disks don't we? Otherwise
you could buy a catweasel.

Last edited by Samwel on 21-Apr-2006 at 12:12 AM.


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Spirantho 
Re: ADFRead 1.0
Posted on 21-Apr-2006 10:13:53
#18 ]
Super Member
Joined: 4-Jun-2004
Posts: 1044
From: Aberystwyth, Wales

@Samwel:

The problem is that the Amiga disks use different timing to your bog-standard MFM drive (PC drive). Because the Amiga had access to all sorts of things the PC didn't, like Paula, it could reach parts of the disk other controllers couldn't reach. The uPD765a was a very simple controller used in machines like ZX Spectrum +3s, and Amstrads as well and didn't have anything like the sophistication. PCs never stopped using it, essentially, so they were always stuck with the limitations of a chip from 1982 or so.

Hence there simply aren't the commands in the geriatric uPD765a's commandset to actually physically read certain blocks. It's also why PCs only have 720K or 1.44M, whereas we've always had 880K or 1.76M - we can use that much more data.

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tonyw 
Re: ADFRead 1.0
Posted on 22-Apr-2006 13:17:39
#19 ]
Elite Member
Joined: 8-Mar-2003
Posts: 3225
From: Sydney (of course)

Or, to put it another way, the Classic Amiga reads the raw data off the disk and then decodes it in software. The VIA southbridge does all the decoding in hardware, assuming PC recording format. You can't read the raw data at all, and if it isn't in the form that the VIA expects, nothing gets decoded at all.


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tlaclair 
Re: ADFRead 1.0
Posted on 6-May-2006 22:25:57
#20 ]
Member
Joined: 10-May-2005
Posts: 11
From: Unknown

I have 2 PC floppies on my WinDoze 2000/xp..I downloaded ADFREAD-1.0 AND FDINSTALL.exe.. I am using Amikit 1.1.1 for my Amiga processes...I ran fdinstall on the PC side and in AMIKIT I ran in a CLI window the ADFread.exe as stated the the readme file but nothing happens..I also don't see the DF0 or DF1 drives in my device list in Amikit..

Anyone got any ideas what I am doing wrong..

Terry

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