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   alt.os.development      Operating system development chatter      4,255 messages   

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   Message 3,025 of 4,255   
   James Harris to wolfgang kern   
   Re: Format for the OS image   
   08 Jan 22 12:30:51   
   
   From: james.harris.1@gmail.com   
      
   On 05/01/2022 18:54, wolfgang kern wrote:   
   > On 05/01/2022 17:39, James Harris wrote:   
   >   
   >>>     What formats of image file are best for the OS itself?   
      
   ...   
      
   >   
   > I prefer a never fragmented (iow: always consecutive) Flat Binary image,   
   > and as all M$-forms are prone to become distributed all over the disk   
   > I'd avoid using any of their formats. Loonix may act quite similar...   
   >   
   > Even we are now forced to use UEFI and the FAT32 boot code, I'd have all   
   > my OS including loader stages as a block of consecutive sectors on disk.   
   > So all I need to know is the LBA-Number of the start sector then.   
   > This needs a certain (stupid easy) tool to "format" such an OS either   
   > manually or full featured autonome.   
      
   IIRC you load your OS image to 0x7e00 although you might move it later.   
   Either way, does it always run from a specific location (in which case   
   you won't need any fixups)?   
      
   I cannot load the image to a fixed location as I want to be able to   
   adapt to different machine configs so it looks as though I have no   
   choice but to relocate it after reading the file into memory.   
      
      
   --   
   James Harris   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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