etworks.com.au> 8a95f8dd   
   From: nopes@none.com   
      
   Hi Guys,   
      
   I am still working on a 1541II drive and have some questions, but first of   
   all I would like to explain   
   the symptoms I was having and what I had done & have been doing.   
      
   1. Symptom   
           * When the drive is powered on, the spindle runs continuously and   
   the LED stayed on.   
       Action   
           * Replaced 6502 chip   
      
   2.  Symptom   
           * After replacing the 6502 and powering on the drive, the drive led   
   now flashes slowly every 2 seconds.   
        Action   
            * Replaced static RAM chip LC-3517A with the same type.   
      
   After performing those 2 actions I am now experiencing Symptom 1 again. I   
   thought the replaced 6502 may have been damaged again, but I have several   
   6502 spares that I tried.   
      
   Now I am beginning to think that I may have damaged the ROM, tt reads fine   
   in my programmer as a 27128. The problem is that the binary produced does   
   not match with other 251968-03 I eproms I have downloaded, there are many   
   side by side differences and CRCs come out different. Were there different   
   versions of the ROM with 251968-03 ?   
      
   My dumped rom produced CRC32(0xf455d750)   
   Downloaded ones all produced CRC32(0x899fa3c5)   
      
   I can't find any info on different versions of the 251968-03. So hopefully   
   the rom is stuffed and I can just burn a new one, your thoughts ?   
      
   Cheers,   
   Sam   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)