From: nowhere@nospicedham.never.at   
      
   On 18.04.2021 11:09, Robert Prins wrote:   
   > On 2021-04-17 21:50, Frank Kotler wrote:   
   >> On 04/17/2021 06:07 PM, Robert Prins wrote:   
   >>   
   >> ...   
   >>> Turbo Pascal V3 (and probably versions 1 & 2 too) created .COM files   
   >>> are not run-of-the-mill .COM files.   
   >>   
   >> As I recall, DOS doesn't care what the file is named. If the first two   
   >> bytes are "MZ", it's an exe. Perhaps we should not call it .COM?   
   >   
   > They are not MZ files, they are real COM files, be it that they do   
   > strange things once loaded.   
   >   
   > Not that strange, given that "turbo.com", the original "IDE" did also   
   > handle multiple segments (itself, and the image of the compiled program,   
   > when set to run from memory) Anders Hejlsberg, who originally wrote it,   
   > was (and still is) pretty brilliant guy.   
      
   if they are real COM files then the segment info is found in the code.   
      
   often seen start in com-files:   
      
   org 0100h       ;to override DOS default segment setting   
     push CS        ;the COM-loader grant a few bytes stack   
     pop  SS   
     mov  SP.xxxx   ;wherever it's wanted to be   
     push CS   
     pop  DS   
     push  0   
     pop  ES   
   ....   
   __   
   wolfgang   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)