29d131aa   
   From: B_Plenge@NoSpam.com   
      
   Blake Patterson wrote:   
   > On Apr 26, 11:59 pm, "Tom Lake"  wrote:   
   >> "Blake Patterson"  wrote in   
   >> messagenews:19008afd-f196-4da2-b5f8-fdfa05e8cb20@z72g2000hsb.   
   ooglegroups.com...   
   >>   
   >>> I just received a TRS-80 Model 4 from eBay. My first TRS-80 ever   
   >>> (and I've been into computers since '82). How do I boot it from   
   >>> disk?   
   >>   
   >>> I have TRSDOS 6, LDOS, etc. But I turn the machine on and am greeted   
   >>> by "CASS?" and then a request for sys memory levels and then a   
   >>> prompt. The two drives are spinning at this point. How do I boot the   
   >>> DOS?   
   >>   
   >> If you're getting the CASS? message without holding down the Break   
   >> key,   
   >> either the disk drive interface is defective or the Break key is   
   >> stuck down   
   >> somehow. A working Model 4 should display a Diskette? message if the   
   >> Break key isn't held down.   
   >>   
   >> Tom Lake   
   >   
   > Several keys are bad: 2 r j ; z v b   ...BREAK seems to work tho - it   
   > CR's when I hit it.   
   >   
   > So is the disk system dead?  Steps to diagnose?  Oy...  Tnx.  :-(   
   >   
   >   
   >   
   >   
   > bp   
      
   Sounds like your problem is caused by the keyboard issue.  The Model 4 would   
   boot to Model III cassette mode if a certain key was held down at power on.   
   That's why you were getting the Model III message.  I don't remember what   
   key it was, it's been a long time.  It sounds as if once the keyboard issue   
   is resolved it should fix your booting to disk problem too.   
      
      
   Best,   
   Bill   
      
   --- SoupGate-Win32 v1.05   
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