Hey, that's a nice board! Congratulations! 😀

Sure the disk is hopelessly damaged ? It doesn't look too shabby.

From personal experience, even dirty disks can be partially saved now and then.
Sometimes this involves the use of a cleaned drive or a 360K drive.

Personally, I try to copy files manually first if I do enounter lots of read errors.
Sometimes lifting the floppy heads manually with the lever helps to find the sweat spot of maxium readibility.

I know, that sounds very amateurish, but it worked several times for me. 😊
Another trick is to use WinImage and try to re-try reading the disk on and on.

Sometimes I combined that with inserting an alcoholl (isopropyl) soaked spare floppy (dirty disk->alcohol disk->pause->dirty disk->alcohol disk->pause..).
That was only a last resort, of course. Doing so will damage the floppies (esp. the fleece) beyond repair. I don't recommend that.

Anyway, maybe other Turbo utilities will also work ? Maybe you'll find a fitting utility by searching for the chipset.
Otherweise, I have no clue what to do. I'm still learning about XT machines..

Good luck! 😀

Your board is the Juko ST.

Thank you for the advice.

I did try by cleaning my floppy drives (tried it with two floppy drives).
I even tried cleaning the disk itself, but no luck.

I'll try searching around for the Juko utilities.

This is the kind of board i use in my Turbo XT build. Quite speedy for an XT. I've been looking forever for the 10Mhz 8086 version but that one is extremely hard to find.

Can these boards run at precisely 4.77 MHz?

Errius wrote:

Can these boards run at precisely 4.77 MHz?

I've since packed away the motherboard as I'm wanting to build it into another case but, when I tested it, Landmark 2.0 & Norton SI 6.0 did indicate it was running at 1.0x that of a 4.77 MHz XT (in "de-turbo" mode).
How "accurate" it runs at precisely the speed of a real IBM PC 4.77 MHz, I can't say.
However, I would guess that if you have an old CGA speed sensitive game, that only wants to run at 4.77 MHz, then it should be "accurate" enough to allow you to play such a game.

carlostex wrote:

This is the kind of board i use in my Turbo XT build. Quite speedy for an XT. I've been looking forever for the 10Mhz 8086 version but that one is extremely hard to find.

The closest I got to an 8086 was to buy an old Olivetti M24 (AT&T 6300) that runs at 8 MHz. I believe that CPU can be upgraded to a faster version.

Nice board!

I would also recommend to try some other floppy drives, had success with many old floppies that failed to be read in one.

What is the exact size of the file?

Is there any hint in the manual how to enable this feature by Software?

Predator99 wrote:

Nice board! […]
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Nice board!

I would also recommend to try some other floppy drives, had success with many old floppies that failed to be read in one.

What is the exact size of the file?

Is there any hint in the manual how to enable this feature by Software?

I did try to read it another floppy drive, but no luck.
Unfortunately, the disk has become totally unreadable (I'm getting the infamous "General Failure" error in DOS) and I therefore cannot look up the contents on the disk or their file sizes.
The manual indicates that you just run the "TURBO.COM" utility after which you can use the shortcut commands on the keyboard (as described in my original post) to either run the PC in "normal" or "turbo" mode.

I would try to create a disk image with your favorite utility and note what sectors on the floppy are actually unreadable. Post that image if its not too bad...maybe we are able to reconstruct this file 😉

Predator99 wrote:

I would try to create a disk image with your favorite utility and note what sectors on the floppy are actually unreadable. Post that image if its not too bad...maybe we are able to reconstruct this file 😉

No luck - I think the magnetic parts of the disk was too far gone.

Hmm...I assume it does not detect the right capacity? Maybe your drive tries to access 1.2 MB but its a 360K or 180K disk?
Do you have a 360k disk drive?

Have found this here

1Category: resident utilities
2INT 13 - UNIQUE UX Turbo Utility - SET TURBO MODE
3
4	AX = FFFFh
5	BH = AAh
6	BL = subfunction
7	    00h installation check
8		Return: AX = 1234h if installed
9	    01h turn on Turbo mode
10	    02h turn off Turbo mode
11	    03h set Turbo mode according to hardware switch
12	    04h set disk access to Turbo mode
13	    05h set disk access to Normal mode
14Return: nothing
15SeeAlso: INT 15/AH=DFh
16Index:	installation check;UNIQUE UX Turbo Utility

Should be simple to rewrite it on your own 😉

EDIT: But seems to be related to disk access???

Predator99 wrote:

Hmm...I assume it does not detect the right capacity? Maybe your drive tries to access 1.2 MB but its a 360K or 180K disk?
Do you have a 360k disk drive?

Yes, tried it in both a 360k & 1.2 MB floppy drive.

Predator99 wrote:

Have found this here […]
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Have found this here

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1Category: resident utilities
2INT 13 - UNIQUE UX Turbo Utility - SET TURBO MODE
3
4	AX = FFFFh
5	BH = AAh
6	BL = subfunction
7	    00h installation check
8		Return: AX = 1234h if installed
9	    01h turn on Turbo mode
10	    02h turn off Turbo mode
11	    03h set Turbo mode according to hardware switch
12	    04h set disk access to Turbo mode
13	    05h set disk access to Normal mode
14Return: nothing
15SeeAlso: INT 15/AH=DFh
16Index:	installation check;UNIQUE UX Turbo Utility

Should be simple to rewrite it on your own 😉

EDIT: But seems to be related to disk access???

Where did you find this?

Google 😉
http://www.delorie.com/djgpp/doc/rbinter/id/15/8.html

Can you test if installation check works? Do you know how to do with debug?

Maybe its a 180k disk and you have to tell the disk imager to treat it as one?

No, it was definitely a 360k diskette.

With the help of Norton Utilities, I was able to "reconstruct" some of the files on the disk. I've attached a zip file with the files that were on the disk.
Initially, Norton Utilities just renamed every file as "FILE000X" and, by using the DOS editor, was able to deduce what each file was.
There are basically three utilities on the disk, namely TIME.COM (I assumed the extension was .COM), TURBO.COM & CDISK.SYS
The other two files appears to be text files and I just named them the same as the two utilities with a *.TXT extension.

The two text files appears to be "broken" (some "garbage" at the end of each file) and I'm not sure about the RAMDrive file (haven't tested it yet).
Maybe someone will have some of these Juko utilities somewhere.

Looks good! Does Turbo.com work?

Predator99 wrote:

Looks good! Does Turbo.com work?

Would appear so - I don't have the actual motherboard installed right now, but by just running it on my other DOS PC, it does load the tsr and I am able to select the different "switches".