🚀 go-pugleaf

In article <1992Nov11.095107.6433@rhrk.uni-kl.de> baum@kirk.es.go.dlr.de writes:

>Hi!
>
>I originally posted a question on accessing real mode memory (the first MB)
>directly. This is needed to read/write to memory located on add on boards
>as frame grabbers grafics cards, etc. The solution is relatively simple and
>was supplied to me first by nar@math.wayne.edu (Mark Narduzzi) and then by
>brad@huey.jpl.nasa.gov for use with Borland C++ 3.1. 
>
>The Windows kernel supplies selectors for 64KB size memory pages, which are
>called __A000H, __B000H, ... These are used in the following manner to access
>memory D0000-DFFFF:
>
>extern WORD _D000H;
>LPBYTE fp = MAKELONG(0, &_D000H);

There is also a _0000H, _0040H and _ROMBIOS - very useful...

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Malcolm S. Muir                              EMAIL: malcolm@muir.demon.co.uk
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