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XF351 for sale on ebay


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#26 bob1200xl OFFLINE  

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Posted Mon Nov 10, 2014 12:23 PM

I dunno - can anybody read that?

 

Bob

 

DSC01425.JPG

 

 

Unit is going to need a retro-bright treatment by the way.....

sorry for being curious Bob but what is the hand writing on top of the box ? anything special ?



#27 bob1200xl OFFLINE  

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Posted Mon Nov 10, 2014 12:26 PM

The main case does not seem to be dis-colored. It may be that someone has already swapped the drive.

 

Bob



#28 Fletch OFFLINE  

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Posted Mon Nov 10, 2014 12:37 PM

 I have an SF354 I can look at tonight.  I'll open her up and report back.

 

OK - is this an SF354 mechanism? I assumed that the ST used regular 34-pin drives. Maybe not? The XF351 drive has a single row of interface pins and what looks like a standard power connector. It is also thicker than a regular 3.5.

 

Bob

 

attachicon.gifDSC01422.JPG

 

attachicon.gifDSC01423.JPG

 

attachicon.gifDSC01424.JPG

 

 



#29 flashjazzcat OFFLINE  

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Posted Mon Nov 10, 2014 12:40 PM

Someone needs to clone that controller board so we can mod our otherwise useless ST floppy drives. :)



#30 SoulBuster OFFLINE  

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Posted Mon Nov 10, 2014 12:57 PM

here are some pics maybe these will help

http://atariage.com/...ator/?p=2747536

#31 Tempest ONLINE  

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Posted Mon Nov 10, 2014 1:05 PM

I dunno - can anybody read that?

 

Bob

 

attachicon.gifDSC01425.JPG

 

 

 

Chinon FCC #272 454 ??? (looks like =1) ) then maybe BRR?



#32 bob1200xl OFFLINE  

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Posted Mon Nov 10, 2014 1:06 PM

Looks like the XF351 uses an ST354 mechanism. Anybody got an ST354 they could part with?

 

 

Bob



#33 Level42 OFFLINE  

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Posted Mon Nov 10, 2014 1:12 PM

The main case does not seem to be dis-colored. It may be that someone has already swapped the drive.
 
Bob

oh wow yes that could very well be !

#34 Tempest ONLINE  

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Posted Mon Nov 10, 2014 1:25 PM

Or they were just made of two different batches of plastic.  I have several original unaltered drives for various systems that have discolored in different spots.  I don't think that's enough to tell if the mech has been swapped out.



#35 Level42 OFFLINE  

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Posted Mon Nov 10, 2014 1:56 PM

True.

#36 Fletch OFFLINE  

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Posted Mon Nov 10, 2014 2:16 PM

Bob,

 

I do have one, If it turns out that it is the same drive mechanism I'm sure I could part with it.



#37 bbking67 OFFLINE  

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Posted Mon Nov 10, 2014 2:22 PM

I'm not doubting you, since you own one of these, but this suggests that it is the same mechanism as the SF354.

 

http://firewi.com/ahs/xf351.html

 

 

In the quoted site kind of infers that the unit is a 1.44MB, but obviously its not.  Assuming it is the same mechanism as the SF354 it's single sided 360KB.  Apparently these units were very similar in operation to the XF551... so it stands to reason that DOS XE would have been the goto DOS.  A double sided version would have been much more useful... the other thing that is incorrect about 1.44MB is that 1.44 MB diskettes and drives were introduced sometime in 1987... and the XF351 developed in 1986 (doesn't the ROM chip have 1986 written on it)?


Edited by bbking67, Mon Nov 10, 2014 2:23 PM.


#38 bob1200xl OFFLINE  

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Posted Mon Nov 10, 2014 2:26 PM

Yes, the ROM is from '86.

 

Bob



#39 flashjazzcat OFFLINE  

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Posted Mon Nov 10, 2014 2:49 PM

 

In the quoted site kind of infers that the unit is a 1.44MB, but obviously its not.  Assuming it is the same mechanism as the SF354 it's single sided 360KB.  Apparently these units were very similar in operation to the XF551... so it stands to reason that DOS XE would have been the goto DOS.  A double sided version would have been much more useful... the other thing that is incorrect about 1.44MB is that 1.44 MB diskettes and drives were introduced sometime in 1987... and the XF351 developed in 1986 (doesn't the ROM chip have 1986 written on it)?

 

Although 1.44MB capacity is mentioned with reference to 3.5" floppies in general, the article infers to me that the XF351 unit was 720KB DS/DD.



#40 TXG/MNX OFFLINE  

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Posted Mon Nov 10, 2014 2:51 PM

Nice bob could you dump the rom chip aswell before selling and tell us which cpu this drive uses i guess 8040/8050 like xf551

#41 _The Doctor__ ONLINE  

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Posted Mon Nov 10, 2014 2:55 PM

I have only been aware of a 360 and 720 official version of XF3..... that being said my xf551 were updated to 1.4... the bad news..... low density disks all survived the sands of time and worked... the high 1.4 ones over 75% failed after 21 years.... that made bbs back ups useless for reconstruction.



#42 flashjazzcat OFFLINE  

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Posted Mon Nov 10, 2014 3:07 PM

1.44MB floppies are rubbish, IMO. But like I say: that article doesn't suggest for a moment that there was ever a 1.44MB Atari floppy drive. The XF551 mod sounds pretty interesting, though. I didn't even realize this was possible. I'll stick at 720KB, though. :)


Edited by flashjazzcat, Mon Nov 10, 2014 3:07 PM.


#43 bob1200xl OFFLINE  

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Posted Mon Nov 10, 2014 3:46 PM

The XF551 mod is complicated by the less than robust PCB that Atari put out. Otherwise, it is pretty simple.

 

Some AA member got one of the first XF551s and had a 3.5 in there as soon at he got it open. ( I guess he violated the warranty...) He had to write (in BASIC, no less) an 8040 dis-assembler so he could alter a couple of parameters. That was all it needed.

 

I have hundreds of 720K, 3.5 8-bit disks. Works great.

 

Bob



#44 bob1200xl OFFLINE  

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Posted Mon Nov 10, 2014 3:49 PM

 Could you take a peek in there an let me know?

 

Thanks.

 

Bob

 

Bob,

 

I do have one, If it turns out that it is the same drive mechanism I'm sure I could part with it.



#45 flashjazzcat OFFLINE  

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Posted Mon Nov 10, 2014 4:03 PM

The XF551 mod is complicated by the less than robust PCB that Atari put out. Otherwise, it is pretty simple.


I never experienced issues with the PCB on either of mine, but I guess I was just lucky. I put a 3.5" 720K mech in one and left the other one stock.

#46 Fletch OFFLINE  

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Posted Mon Nov 10, 2014 4:13 PM

IMG_1100.JPG IMG_1102.JPG Not looking good.   :(

 

 



#47 walter_J64bit OFFLINE  

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Posted Mon Nov 10, 2014 4:28 PM

 

In the quoted site kind of infers that the unit is a 1.44MB, but obviously its not.  Assuming it is the same mechanism as the SF354 it's single sided 360KB.  Apparently these units were very similar in operation to the XF551... so it stands to reason that DOS XE would have been the goto DOS.  A double sided version would have been much more useful... the other thing that is incorrect about 1.44MB is that 1.44 MB diskettes and drives were introduced sometime in 1987... and the XF351 developed in 1986 (doesn't the ROM chip have 1986 written on it)?

That's a scary thought DOS XE, I've toyed with DOS XE it's pain just to move files over to DOS XE.  



#48 bob1200xl OFFLINE  

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Posted Mon Nov 10, 2014 4:28 PM

Darn... that isn't it.

 

Thanks for trying!

 

Bob



#49 Mathy ONLINE  

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Posted Mon Nov 10, 2014 4:51 PM

Hello Jon

 

Someone needs to clone that controller board so we can mod our otherwise useless ST floppy drives. :)

 

Dropcheck?

 

Sincerely

 

Mathy

 

PS I read on her site that's she's back in business.  And she could add the second SIO port.


Edited by Mathy, Mon Nov 10, 2014 4:51 PM.


#50 ilaskey OFFLINE  

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Posted Mon Nov 10, 2014 4:54 PM

I'm just impressed someone had a copy of Curt's site back when it had loads of cool content. It seems to have lost much of the interesting stuff over the years but here it all is.




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