[fpc-pascal]GPF when accessing DOS memory

[Michael Knapp]

Sebastian Schuberth wrote:

> New(CIBMem);
> { Allocate DOS memory block and save segment / selector }
> If Not dpmiAllocDOSMem(SizeOf(CIB^), at CIBMem^.Segment, at CIBMem^.Selector)
> Then Exit;
> 
> { Make CIB point to DOS memory }
> CIB:=Ptr(CIBMem^.Segment,0);

there is the error - Ptr() does not convert a real-mode adress to a
protected-mode offset
there should be a "real2protected" dpmi/go32v2 call

> 
> { Write 'VBE2' signature into DOS memory, THIS IS WHERE FPC CRASHES }
> CIB^.Signature:=VBE2;

of course it crashes there

Michael
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