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

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   Message 3,121 of 4,255   
   James Harris to wolfgang kern   
   Re: The EA jump immediately after enabli   
   15 Mar 22 15:54:20   
   
   From: james.harris.1@gmail.com   
      
   On 15/03/2022 07:45, wolfgang kern wrote:   
   > On 13/03/2022 21:18, wolfgang kern wrote:   
   >> On 11/03/2022 12:45, James Harris wrote:   
   > [...]   
   >> YOU WON. It took a while to convince myself to see it different yet :)   
   >   
   > I had to give my workstation to an employer, so I can't check myself   
      
   I had a similar logistics problem. My current development is on Fat16   
   and runs in a VM. To test it on real hardware I'd have to write to a   
   partition on another machine's HD. That was too much work to set up   
   straight away so I pulled out some old code which has a Fat12 loader.   
      
   It was a bit of a nuisance as I had to build/mount/write/unmount,   
   transfer a floppy and reboot for each test but it was adequate as long   
   as there weren't too many experiments to run.   
      
   > one more instruction may be worth to check between set PE and load CS:   
   >   
   > 2E 89 06 xx xx   mov [cs:xxxx],ax   ;use any harmless address here   
   >   
   > would a set PE cause CS not writable ?   
   > the RM default wont even test that.   
      
   That's a good test but I haven't got time to run it ATM and I'm going to   
   be away for a few days. Will reply to posts when I get back.   
      
   We should try to predict what will happen. What would you expect? I   
   don't know yet but I'll have a think about it.   
      
      
   --   
   James Harris   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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