From: thom527@bellsouth.net   
      
   greetings to all !   
      
   1st many thanks to all who have answered post!   
      
   2nd yes it is the ex i to the floppy drive    not to cpu   
      
   3red anyone willing to make one for me   lets talk price   
      
   thanks again   
      
   manuel   
      
      
   >>>>>> Greetings!   
   >>>>>>   
   >>>>>> I have been looking for some time to purchase a flat cable that   
   >>>>>> connects   
   >>>>>> expansion interface to floppy drive. Any suggestions?   
   >>>>>>   
   >>>>>> thanks in advance   
   >>>>>>   
   >>>>>> Manuel   
   >>>>> Two options: Either make the cable yourself, or try one of the vendors   
   >>>>> who sell cables on eBay.  I have previously found "twlf2" helpful for   
   >>>>> made-to-order cables (though the cost of frieght to Australia proved   
   >>>>> too expensive).  If you need an email address for twlf2, let me know.   
   >>>>> If you make the cable yourself, note that some pins need to be removed   
   >>>> >from the connectors (drive select is achieved by this means). If you   
   >>>>> need more details, I am happy to help.   
   >>>> Hi   
   >>>> I was just reading on a TRS yahoo group that if you connect a TRS-80   
   >>>> with a EI that needs a buffered cable tahat you short out the supply   
   >>>> voltage.   
   >>>> So you better make sure what your EI needs. I am sure that you can   
   >>>> find this out based on the partnumber or serialnumber.   
   >>>> Bu   
   >>> He was inquiring about the cable from the EI to the disk drives, not EI   
   >>> to the CPU.  The only concern with the drive cables is drive addressing;   
   >>> Tandy selected all drive selects at the drive, and pulled pins from the   
   >>> cable (all but the single select used by that drive position) which is   
   >>> completely different from how IBM did it (all drives have DS1 ONLY   
   >>> selected, and a twist is put in the cable to select between DS0 and DS1)   
   >>   
   >> I believe he was talking about the flat cable between the keyboard and   
   >> the EI.   
   >> But maybe i am misinterpreting the issue.   
   >> Here it is to read for your self:   
   >> ->> I think the EI you had should have a buffered cable and needed a ->>   
   >> similarly modified "keyboard" as well as the actuall buffered   
   >> cable. ->> EI's that have this modification are usually marked with a   
   >> sticker   
   >> ->> 'WARNING Use only with buffered expansion interface cable'. Do you   
   >> have ->> the buffered cable? I think something will burn if you use a   
   >> straight ->> cable because you are connecting 5V to 0V. As well as the   
   >> buffered   
   >> cable ->> the "keyboard'" needs to have some signals in a 6pin DIN plug   
   >> (RAS   
   >> CAS).   
   >> ->   
   >> ->Early EI's needed the buffered cable, later ones did not. Look up   
   >> your S/N ->and model to be sure. Be sure that everything is powered on,   
   >> there   
   >> are three ->plugs - one for the Model 1, one for the EI, and one for the   
   >> monitor.   
   >> -> Bu   
   > That's talking about the CPU to EI cable, but the original query in this   
   > thread, to wit:   
   > >I have been looking for some time to purchase a flat cable that   
   > >connects expansion interface to *floppy*drive*. Any suggestions?   
   > is not.  The cable to the floppy drive has nothing to do with whether or   
   > not the EI is buffered or not.   
      
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