Greaseweazle disk image reader writer

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catmando
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Greaseweazle disk image reader writer

Post by catmando »

Anyone tried reading writing any ST disk image formats with this yet?

https://github.com/keirf/Greaseweazle/wiki
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Re: Greaseweazle disk image reader writer

Post by Bama »

I have not but I just requested to be added to the facebook group in hopes of learning more.
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Re: Greaseweazle disk image reader writer

Post by Bama »

I have purchased the hardware pieces. I will need to test and then assemble the hardware and then test an Atari diskette.
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Re: Greaseweazle disk image reader writer

Post by catmando »

Look forward to hearing about your experience
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Re: Greaseweazle disk image reader writer

Post by Bama »

Hardware assembled.
Firmware installed.
Python and GreaseWeazle installed on Mac.
I used "ls /dev/cu.*" to confirm my Mac sees the Greaseweazle and to get the proper device name.

I have been testing with known good Atari Floppy diskettes.
I was able to image a diskette with FastCopy program on it.
I then wrote the image as an HFE file. Opened the disk and ran FastCopy from the HXC.

Early results are promising.
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Re: Greaseweazle disk image reader writer

Post by catmando »

How much did the parts cost you in total?
Atari Falcon Tos 4.04 | 14mb | IDE CF 2GB
Atari STE Tos 1.62 | 4mb | HxC Slim SD 8GB
Atari STE Tos 1.62/2.06 | 4mb | Floppy A-B Mod | IDE SD 4GB
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Re: Greaseweazle disk image reader writer

Post by ijor »

It is very nice to have an open source alternative to SCP and the Kryoflux. But unless somebody will provide this fully assembled, and with software that would run directly without something like phyton, then it would be very restricted.

Btw, I'm not sure this device is suitable for older 5.25 drives that require high current drivers and buffers. I would check with the developer before.
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Re: Greaseweazle disk image reader writer

Post by ijor »

Btw, it is just by chance that the name is so similar to the Catweasel, a predecessor of all these "flux level" devices?
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Re: Greaseweazle disk image reader writer

Post by Bama »

ijor wrote:It is very nice to have an open source alternative to SCP and the Kryoflux. But unless somebody will provide this fully assembled, and with software that would run directly without something like phyton, then it would be very restricted.

Btw, I'm not sure this device is suitable for older 5.25 drives that require high current drivers and buffers. I would check with the developer before.
Less than $23 US, for two complete systems and that includes five USB/TTL converters (I only needed one to install the initial firmware.)
If you have have USB/TTL & the DuPont wires then it’s just the cost of the “blue pill” which was $9.80 US (including shipping from Germany.)
A7983ED8-1115-41C3-B9E9-4C22420970D4.jpeg
B9637939-72D6-4C6C-8794-296522B06E36.jpeg
I am a novice with a soldering iron and did fine attaching the pins to the blue pill. So if I can do it... :lol:

Yes the 5 1/4 drives must have an external power supply.
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Re: Greaseweazle disk image reader writer

Post by ijor »

Bama wrote:Yes the 5 1/4 drives must have an external power supply.
I'm not talking about the power supply, but about the maximum current of the input/output buffers/drivers at the board. Older DD 5.25 drives (not just any 5.25 drive) require high current components.
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Re: Greaseweazle disk image reader writer

Post by Bama »

ijor wrote:
Bama wrote:Yes the 5 1/4 drives must have an external power supply.
I'm not talking about the power supply, but about the maximum current of the input/output buffers/drivers at the board. Older DD 5.25 drives (not just any 5.25 drive) require high current components.
Now I understand.
Are there risks to the hardware if the buffers don’t get enough current?
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Re: Greaseweazle disk image reader writer

Post by ijor »

Bama wrote:
ijor wrote:I'm not talking about the power supply, but about the maximum current of the input/output buffers/drivers at the board. Older DD 5.25 drives (not just any 5.25 drive) require high current components.
Now I understand. Are there risks to the hardware if the buffers don’t get enough current?
Probably no, just that it won't work correctly. But I wouldn't try just in case. Anyway, the problem is probably only when connecting old 5.25 DD drives.
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Re: Greaseweazle disk image reader writer

Post by Bama »

There are recent postings on the Greaseweazle Facebook group about 5.25 and 8 inch drive use if that is of interest.
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Re: Greaseweazle disk image reader writer

Post by MiggyMog »

I have built one up and got it imaging some disks. I will take a look and see if the ones I made run ok on emulators and report back. The parts can be bought for like 4 quid if you already have drive and USB micro cable and some basic soldering skills, if not it's even a good thing to learn on as it's so cheap! There is now a new daughter board or hat if you prefer which means your life is made easier. See the git wiki and facebook posts s for detail. I am amazed mine read disks at all!
Last edited by MiggyMog on Tue Jan 07, 2020 8:57 am, edited 2 times in total.
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Re: Greaseweazle disk image reader writer

Post by Bama »

9F241BE5-34BF-4E6E-9B97-464EFAB4727C.jpeg
I purchased a batch of the daughter card PCB’s and have plenty to share.
If you promise to contribute your images to the Floppy Disk Repository

http://www.atari-forum.com/viewtopic.php?f=104&t=28228

Then I will share freely.
I will mail to those in USA via first class envelope.
To my Worldwide Atari Friends, you will need to pay postage.
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Re: Greaseweazle disk image reader writer

Post by Mikerochip »

Hi Bama, how much is postage to Ireland, can I ask?

I've been scanning in covers and disks, and now I want to start dumping my floppies!!
(My efforts are here: https://archive.org/details/@mikerochip )

I have a bluepill, the pin headers, and a few drives :)
All I need is the PCB.
I think I can get some made for about $15, but, I really need only 3-4 of them at most.
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Re: Greaseweazle disk image reader writer

Post by Bama »

Mikerochip wrote:Hi Bama, how much is postage to Ireland, can I ask?
I can’t imagine a first class envelope to you will be very expensive. PM your address and I will check.
Mikerochip wrote: I've been scanning in covers and disks, and now I want to start dumping my floppies!!
(My efforts are here: https://archive.org/details/@mikerochip )
Strong Work!
Mikerochip wrote: I have a bluepill, the pin headers, and a few drives :)
All I need is the PCB.
I think I can get some made for about $15, but, I really need only 3-4 of them at most.
The PCB’s are not required but make things tidier. I have plenty and happy to share.
:-)
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Re: Greaseweazle disk image reader writer

Post by Mikerochip »

Did I ask?

Are there different PCB's for IBM PC 1.44MB drives, and Atari/Amiga drives?
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Re: Greaseweazle disk image reader writer

Post by Decky »

Just wondering if anyone knows if it is possible to copy protected discs for example Dungeon Master for the Atari ST. the reason I ask is because I tried to copy it and loaded the image into STeem after converting it to a *.msa file and it did not run the game. Also I have loads of greaseweasle PCB's if anyone is in needs of one. No charge other than You pay postage.
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Re: Greaseweazle disk image reader writer

Post by Mikerochip »

Yes it's possible, that's what they are for: making copies of disks that include the copy protection.

But, the disk image, the .scp file, has the low level copy.
When you converted it to .msa you stripped out all the copy protection.

Leave the file as a .scp, and it'll play fine. Or, better yet, use Aufit to check the disk, make sure it imaged ok, and try to convert it to a .stx file.
Keep the original .scp file, and upload to the .SCP repository too?
(You really need to check the disk, and see what the quality of the dump was like, eg, if the disk was damaged, or had mould, or is simply dying)

See: viewtopic.php?p=403788

And also to answer my own question: no, the one PCB will work with Amiga DS/DD / Atari ST DS/DD / IBM PC DS/DD + DS/HD drives.

Amiga HD drives are specially modified to run at 150rpm, not 300.
I don't know what Atari ST HD drives are! I've never seen one.
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Re: Greaseweazle disk image reader writer

Post by Decky »

I have just got my original Dungeon Master Floppy image running in STeem. can I just check are the files massive compared to original Atari Floppy Discs? My Dungeon Master File is 29.4Mb
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Re: Greaseweazle disk image reader writer

Post by Mikerochip »

Yup.

Many of mine are 60-90mb.

What does the disk look like in Aufit?
If it looks ok, try saving a .stx file from that .scp.

Did you dump it with 5 revolutions?
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Re: Greaseweazle disk image reader writer

Post by kodak80 »

For SCP dumps, you roughly get 10mb for each revolution recorded so a 5 revolution dump will be at least 50mb or bigger depending on the disk content.

If you want to use this in an emulator and have a smaller file, then use AUFIT to create an STX version and test this with your emulator to confirm it works. Then to save the original SCP dump, use 7Zip to compress it into a 7Z compressed file for storage.
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Re: Greaseweazle disk image reader writer

Post by Decky »

Thanks guys, I appreciate you advice.

I dumped them images with the default of 3 Revs per track. Do I need to do them all over again? Some show errors and recommends saving as *.stx format and the ones I have tried load into the emulator ok.
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Re: Greaseweazle disk image reader writer

Post by Mikerochip »

It depends! (But not on the 3 revolutions!)

What does the protections text file say, and how does the picture look, in Aufit?
If it's all green, then, you're good.

Either way, head over to the other thread, and have a bit of a read.
viewtopic.php?p=403788

Post the image to the thread I linked above, and upload it to dropbox etc, and everyone can look at it, and other people can check, and see if the image is ok!

See how there's usually just 1-2 tracks of copy protection (orange bits) and the rest of the disk is normal?

If there's lots of orange in big lumps on the disk, it's usually unable to read those sectors, so, you might need to redump.

Have a look at some of the images I have posted on Archive.org: https://archive.org/details/@mikerochip ... oftware%22 too.
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