🚀 go-pugleaf

In article <40caqg$kqo@marlin.upe.ac.za> civeng1@ml.petech.ac.za writes:

>I would like to read the date of the PC BIOS within Windows using
>BC 4.0.  The DOS version of a program I have written reads in the
>bytes at addess 0xf000fff5 and works OK even when run under Windows.
>
>The same routine in a Windows program does not work.  Any ideas on
>how to create pointers to this same address.  
>
>Any feedback please EMail me at address civeng1@ml.petech.ac.za
>
>Thanks
>Keith C. Simon
>

I haven't time to check this all out thoroughly but I hope this helps.

In a protected-mode program the "segment" porion of a long pointer is a
selector not a segment number.  A pointer to 0xf000:0xfff5 is
referencing *selector* 0xf000 (which doesn't exist) when what you
want is *segment* 0xf000.

Fortunately Borland provides you with a ready-made selector.  You
need to do something like this:-

unsigned long far *Ptr=MAKELP(&_F000H,0xfff5);


Mike.

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< Mike Barnes               Tel: +44 1663 765734 >
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