ORIGINAL WorkBench checksums

[Supamax]

Originally Posted by Redwood

@Supamax

I'll check the part numbers when I get home this evening.

Thanks a lot ,
the way of the exploding fist... erm, sorry, the way for the complete list is veeeeery long

[Calgor]

Originally Posted by Redwood

@prowler

Intriguing... My Workbench 2.1 (v 38.36) disks were recently purchased, and don't even have a write protect tab (i.e. its impossible that they were ever written to). And yet the checksums you're seeing are different than mine.

How can one be entirely sure they are originals unless purchased from an authorised dealer? I think from some online sites they may say original but can't be sure they have just printed the stickers. You can still write to those disks by putting some sticky tape over the hole, so it is not impossible.

As an example, I got some 3.1 "official" disks, but one of them instead of being the e.g. Install disk, I got 2 copies of the e.g. Storage disk!! Even though the sticker said it was the Install disk. Which leads me to believe that someone had copied them and passed them off as originals. Just food for thought that the original should be thoroughly checked.

[Supamax]

Originally Posted by Calgor

How can one be entirely sure they are originals unless purchased from an authorised dealer? I think from some online sites they may say original but can't be sure they have just printed the stickers. You can still write to those disks by putting some sticky tape over the hole, so it is not impossible.

As an example, I got some 3.1 "official" disks, but one of them instead of being the e.g. Install disk, I got 2 copies of the e.g. Storage disk!! Even though the sticker said it was the Install disk. Which leads me to believe that someone had copied them and passed them off as originals. Just food for thought that the original should be thoroughly checked.

You're right, and this is why I and prowler used a colour-coded list.
A CRC32 gets a green color only if two different users confirm it.
This should give a reasonable sufficient "certainty"... but the list is always open to corrections, of course.

[Redwood]

@Supamax I've checked and the part numbers do indeed start with 310. However looking at them again, I'm inclined to think that Calgor might be right - it's possible the disks are not Commodore originals, with printed stickers.

[Supamax]

Originally Posted by Redwood

@Supamax I've checked and the part numbers do indeed start with 310. However looking at them again, I'm inclined to think that Calgor might be right - it's possible the disks are not Commodore originals, with printed stickers.

Mmmm... if the labels were created from scratch and then printed, perhaps the "author" put "1" instead of "7" (hence the 310xxx instead of 370xxx). Could you perhaps upload a scan of one label?

[Supamax]

Hi,

I dumped my friend's floppy:
Extras 1.2 + Basic 1.2, International, A500/2000, P/N 380706-09

Its CRC32 code is $46383329, identical to the one previously obtained from my floppy.

So it meets the requirements to be colour-coded bold green .

[Supamax]

Hi,

I dumped my WB 2.05 floppies:

WORKBENCH, CRC32 $54E22B1D, P/N 367959-01
FONTS, CRC32 $0F4D1BBD, P/N 367968-01
EXTRAS, CRC32 $5AE9927A, P/N 367960-01

They were given to me with the A600HD I bought on eBay, so I cannot be sure they were not modified.
They meet the requirements to be colour-coded black .

[derSammler]

Dumped my Workbench 1.4 alpha 15 set:

Autodocs: 0xF6A12912
Kickstart: 0x140E9D67
Support: 0x45A2E1E4
Workbench: 0xB532C6CD

I can assure that they are unmodified.

[Supamax]

Originally Posted by pcGTW_Webmaster

Dumped my Workbench 1.4 alpha 15 set:

Autodocs: 0xF6A12912
Kickstart: 0x140E9D67
Support: 0x45A2E1E4
Workbench: 0xB532C6CD

I can assure that they are unmodified.

Hi mate,
thank you very much!
I updated the list.
Could you perhaps tell us some more info taken from the disk labels? (p/n, version, country, Amiga model, etc.)

[derSammler]

No p/n, as those are beta disks. Country US, Amiga model A1000.

[Supamax]

Originally Posted by pcGTW_Webmaster

No p/n, as those are beta disks. Country US, Amiga model A1000.

Thanks a lot
Supamax

[Supamax]

Hi EAB mates,

does somebody have unmodified (always kept write-disabled) WB disks?
This thread is asleep , and I'm sure that a lot of you could give a great contribution here...
Any help is greatly appreciated.

[prowler]

Hi Supamax,

I've acquired some more original Workbench disks bundled with an A500 I bought recently. They are 1.3.x disks and will provide some more data for confirmation of what we have already.

[Supamax]

Originally Posted by prowler

I've acquired some more original Workbench disks bundled with an A500 I bought recently. They are 1.3.x disks and will provide some more data for confirmation of what we have already.

This will be great!

[prowler]

Originally Posted by Supamax

This will be great!

Okay, I've finally got around to dumping the disks that were bundled with that A500, and the results do indeed confirm data that we already have!

These disks have been write-protected from new, and have no sliders fitted in them with which to cover the write-protect hole.

Workbench 1.3.2, Rev 34.28, English A500/A2000, P/N 317789-03 $C5692F06. This disk was colour-coded Black and can now be colour-coded Bold Green!

$2F9CEA9F - Extras 1.3 / Basic 1.2, International, A500/A2000, P/N 317788-01 $2F9CEA9F. This disk was also colour-coded Black and can now be colour-coded Bold Green!

The Very First, English, A500, P/N 380921-02 $1AB58E91. This disk was already colour-coded Bold Green. This is the second original copy of this disk I have acquired, and both have the same checksum!

Well, those disks were worth taking time to dump!

[prowler]

Originally Posted by prowler

Workbench 1.3.2, Rev 34.28, English A500/A2000, P/N 317789-03 $C5692F06. This disk was colour-coded Black and can now be colour-coded Bold Green!

$2F9CEA9F - Extras 1.3 / Basic 1.2, International, A500/A2000, P/N 317788-01 $2F9CEA9F. This disk was also colour-coded Black and can now be colour-coded Bold Green!

I have just realized, while stowing away these new disks in the case where I keep all my original Amiga Workbench disks, that I already had a copy of both these disks in my collection, and it was me who reported those checksums the first time, which led to their being included in the list.

Since the checksums have been reported for two identical and original disks, albeit by the same user, they should still be allocated Bold Green type. (The disks I acquired recently were originally owned by B1k3rdude.)

Also, today, while I still have the equipment set up, I have again dumped my Workbench 2.1 ver 38.36 set, and I can confirm that the checksums I originally reported for these are correct.

There are two reasons why I decided to check these disks:
(1) The checksums for my set do not agree with those reported by Redwood for his set, and
(2) I discovered recently, while dumping some Amiga floppies for hitm4n, that images dumped with DMS occasionally produce discrepancies when decompressed to ADF, particularly when the floppy drive had difficulty reading the disks.
I remember dumping my Workbench 2.1 set originally with DMS from an external floppy drive connected to my Escom A1200, and decided to recheck them by dumping directly to ADF in case the DMS program had corrupted the images.

I didn't really expect there to be any problem with those dumps, but just thought I would check them for the reasons given while I had the opportunity. I'm happy to have cleared that up.

[Supamax]

Hi prowler,
thank you very much!

I updated the list with your last contributions .

[rhester72]

One point of note - the original A3000 (ROM tower model) shipped with three unique 1.3 disks - SuperKickstart 1.3, Workbench 1.3 (contained modified SetClock to work with the A3000 clock chip), and Extras 1.3 (had AmigaBASIC removed due to 68030 incompatibility). I unfortunately do not have part numbers, CRCs, or even the subversion (i.e. 1.3.2) of these disks.

Rodney

[rhester72]

Another thought on this effort...

Would it not be enough to compare the CRC32 to _any_ original disk to _any_ downloaded ADF to achieve validation?

Case in point:

- Booting or opening any folder on a 1.x disk results in updating the .info file for the respective directory, rendering the CRC32 unique and allowing you to detect modification versus the CRC32 of the sample/original floppy

- Booting any 2.x+ disk results in the updating of the timestamp of the :T folder, see above

This is entirely theoretical at this point, but especially for some of the more rare/esoteric disks, this may be a useful way to allow for confident validation of unmodified originals without necessarily needing *two* original samples (only one plus the "from the 'net" copy).

Thoughts?

Rodney

[prowler]

Originally Posted by rhester72

- Booting or opening any folder on a 1.x disk results in updating the .info file for the respective directory, rendering the CRC32 unique and allowing you to detect modification versus the CRC32 of the sample/original floppy

- Booting any 2.x+ disk results in the updating of the timestamp of the :T folder, see above

The above information raises an unwelcome prospect for this thread:

After all this time, many Amiga owners have chosen to remove the battery which was powering their machine's RTC, either because of leakage or as a preventative measure, without replacing it.

While it is still much more likely that two original disks with the same checksum are indeed unmodified, an increasing number of Amiga owners cold booting their machines with the RTC effectively reset means that two or more modified disks with the same checksum is a real possibility.

Note that this in no way refutes the argument that it may be a valid test of the unmodified status of an original disk to compare its checksum with that of a disk image sourced from the 'net.