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Paul Westphal

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Posts posted by Paul Westphal

  10. Posted · Edited by Paul Westphal

    I put this here so it would not get lost in the marketplace. The driver disk works. The drive itself works as seen in the pics. It comes with another 135mb disk(cart). I just tried it on my 1040STe to see if it worked, and it does. It comes with manuals too. I could not find any on Ebay to compare it to, so any reasonable offer will be accepted. Shipping from Portland, Oregon. PM me if interested.

    Syquest #2.JPG

    ICD Link.JPG

    Atari ST-Syquest Drive.JPG

  17. Posted

    Yes. MT ram SUCKS. It has the propensity to not reset after power down. It holds chunks of data, like static ram. FYI- I have seen Atari put a good Japanese ram in the first slot, and the rest were MT. They were aware of this problem, and just tried to save a buck. To make matters worse, they would ship some units with the " terrible two " power supplies that were filled with epoxy. They would overheat, then when they went out, put out extra voltage and fry IC's, starting with the RAM. MMU's don't usually go bad. If the RAM passes, you may want to look into the PIA.

    I am seeing more and more bad PIA's these day's, most being revealed by the official Atari 8 bit testing station I have. This program might reveal where th the bad RAM is.

     

    Paul

    Eightbitfix.com

    atari-power-supplies.jpg

    eXtended RAM test v0.21.0 (2003-09-16)(-XI-)(SK)(en)[128k].xex

    • Like 1

  20. Posted

    All 800xl’s made in Hong Kong are socketed. 

    Every 600xl was made in Hong Kong, never Taiwan.

     

    No real difference in main chips, however you could swap out rev b basic for revision c..

     

    Japanese ram is preferred over MT ( micron technology) ram . 

    MT ram has the propensity to not reset. Later 800xl’s and the XE line use these, mostly. 

  24. Posted

    The stock 1050 does not support double density. I suggest going to Atarimax and getting a Happy 1050 enhancement that will give you true double density.

     

    You might try taking it apart and cleaning the head with a q-tip and rubbing alcohol. Other than that, it might be a read write error. The Read circuits are U22, U23 and U24. Write is Q1.

     

    I You think there might be other problems with the drive You can contact my disk drive expert in Lompoc, CA,  Paul Alhart. ( [email protected] )

    • Like 1
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