From: z80eu@arcor.de   
      
   On 26.12.2011 22:42, Ronald J. Hall wrote:   
   >> [...] after rebuilding the original hardware configuration.   
   >> Surprisingly the internal floppy drive works well, and the computer   
   >> shows the GEM desktop as usual.   
   >> If the DMA chip died, I guess the internal floppy drive would not work,   
   >> too. So it's a mystery for me what can be defect... may be I have moved   
   >> the little ACSI pcb also a bit (because of the short SCSI cable), but at   
   >> the moment I am totally unsure where to look first. Any hints for a   
   >> smart repair ?   
   >   
   > Hi Peter. Have you tried using these drives with other Atari machines,   
   > just to verify that they are working?   
   >   
   > Would go a long ways towards trouble-shooting your problem. At least, you   
   > could rule out the drives being bad, and then concentrate on the Mega STe   
   > itself.   
   >   
      
   This would be a good idea (to narrow it), unfortunately I have no other   
   "ST" machine here.   
   Is there a block schematic diagram of all important STe chips out there   
   (how they working together) ?   
      
   Regards   
     Peter   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)