From: phantomm@suddenlink.net   
      
   "Michael Schwingen"  wrote in message   
   news:slrnhnfh2m.86m.news-1235297497@a-tuin.dascon.de...   
   > phantomm_1  schrieb:   
   >> How can you tell if your MegaST has the bad Blitter?   
   >   
   > First check if it has any blitter at all ;-)   
   > I think there were lists in the german chips&chips hypertext. Other than   
   > that, you could probably just try if it is stable without the fix.   
   >   
   > If you do not need access to the CPU pins to install some upgrade, just   
   > leave it as it is.   
   >   
   > If you do want to upgrade the machine, simply throw out both the fix and   
   > the   
   > blitter. Optimized VDI code (like NVDI) is actually faster than the   
   > blitter,   
   > so this is no real loss, especially if you install a CPU upgrade.   
   >   
   >> Also, were there any problems with Grounding on some of the   
   >> MegaSTs?   
   >   
   > None that I remember. Do you have problems with the machine?   
   >   
   > ycu   
   > Michael   
      
   I have a MegaST here that I've been tinkering with.   
   I have a few upgrades that I can install, one being a JRI Genlock.   
   I also have a large board that I bought from e-bay some time ago,   
   It was advertised as being a Memory upgrade board, I'm not sure   
   what it is.  It's a very long board that plugs into the mega board expansion   
   socket and has a port that goes out to the back of the mega where the little   
   slide door is. It's a 9 pin connection.   
      
   The board has ATR-4CP Rev A3 on it, also Image Systems Corp. 1989   
   Made in USA.   
      
   There is also a 64 pin connection on top of the board.   
   There are alot of chips on this board.   
   The only square socket chip is labled Bt  Bt454KPJ.   
   I notice a 65mhz clock? on it, also has 2 empty sockets. One large   
   Square one with a small one next to it. The large socket has round   
   type holes, looks like for a chip with round pins fits into it.   
      
   It also has a 6 pin wire connection and came with a cable that fits   
   it.   
   I didn't get any instructions with it, but was advertised to me as a   
   large Memory upgrade board.   
      
   I was told it came out of a MegaST and did work.   
      
   I'd like some info on it, what it actually is and does do.   
   I can provide pics if that will help.   
      
      
   Also, a question regarding the MegaSTs Video Shifter Chip.   
   When putting one in the MegaST, does the writting on the chip   
    look upside down when compaired to the other chips around it?   
      
   I'm not sure if the socket for the shifter is put in backward or not   
   going by the Pin 1 Notch on the socket and chip.   
      
   I don't want to put the chip in the wrong way, in other words.   
      
   Barry   
   phantomm@bellsouth.net   
      
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