65f532dc   
   From: joe@user.com   
      
   "Kilo-Niner"  wrote in message   
   news:0984e4df-991e-46ef-8662-af8f6aaa4566@a18g2000yqc.googlegroups.com...   
   > Hello all!  Does anyone know where I could locate a downloadable copy   
   > of the TRS-80 Model I Voice Synthesizer (original Radio Shack, not the   
   > VS-100) Manual?  Been scouring the web but have come up dry so far.   
   > =(  Thanks in advance!   
   >   
   > Very Respectfully,   
   >   
   > kilo-niner   
      
   I don't have a manual, but I think I remember how it worked.   
      
   The VS plugged into the expansion bus as monitored the address lines.   
   There's was a 'buffer' that it would look for.  That is, a small block of   
   memory that when it decoded.  If I remember right, it was 16 sequential   
   bytes on a 16 byte boundary in the video memory in what would be the lower   
   right of the screen.  Sorry, I don't remember the actual location.  But I   
   think it was the second line from the bottom on the screen.   
      
   Anyway, whatever data was put on the screen in those 16 bytes was   
   interpreted as VS command/data.   
      
   I don't remember what chipset was in the thing.  I had an unpotted unit at   
   one time, but I let it go.   
      
   It's not hard to figure out, as almost anything in those screen locations   
   will trigger it, but there might have been an init sequence.   
      
   Sorry I don't have any command or dictionary info.  I moved on real quick as   
   I got the other VS units real quick that were a lot easier to use.  Ie,   
   serial interface.   
      
   Mike   
      
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