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List:       bochs-dev
Subject:    Re: Win95 boot problem...
From:       David Andrew Ross <snakey () pobox ! com>
Date:       1998-01-18 0:15:40
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This is an older version of bochs, so the problem will probably disappear
when I move to a newer version.

On Sat, 17 Jan 1998, Kevin P Lawton wrote:

> > Well, the Win32 port got a bit further now, but it's still not quite there
> > yet.  Has anyone else encountered this problem on Win95 boot...
> > 
> > bochs: panic, pic: io read to address 0020
> > ...
> > >> [e4] in_alib [20] AL, #20
> > 
> > David Ross
> > dross@pobox.com
> 
> I looked at the PIC emulation code (iodev/pic.cc).  I don't
> see how it's possible that this could printed out since the
> code looks like:
> 
>   switch (address) {
>     case 0x20:
>       if (...) {
>         ...
>         return(...)
>         }
>       else {
>         ...
>         return(...)
>         }
>       break;
>     case 0x21:
>     ...
>     }
>   bx_panic("pic: io read to address %04x\n", (unsigned) address);
> 
> For 'case 0x20', either the if() or the else() clause does a return(),
> so it can't reach the panic() on the bottom.
> 
> The only things I can think of, is either you have changed something,
> or change the %04x to %08x in the bx_panic(), to see if there is
> garbage in the upper word of 'address'.
> 
> -Kevin
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> 

David Ross
dross@pobox.com


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