From: Robert.Riebisch@arcor.de   
      
   Dr Engelbert Buxbaum schrieb:   
      
   > IIRC the original OS for Mac was written (largely) in Pascal. Also, for   
   > DOS there was a replacement command processor, 4DOS, which was written   
   > in TP and assembler.   
      
   4DOS was written in MSC und MASM. see   
   http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/util/user/4dos/7.50.1/   
      
   > TP6 and later would seem a good starting point because of the seemles   
   > integration of assembler sections in a Pascal program.   
      
   ACK   
      
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   Robert Riebisch   
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