[fpc-pascal] Pointers

[Steve Williams]

Daniel Franzini wrote:
> BEGIN
>   InitGraph;
>     Screen := MEM[$A000];   { Set up the screen buffer pointer }
> <-----------here is the error
>   WHILE NOT KeyPressed DO
>     SetPixel(
>        RANDOM(320),     { Random X (Range 0-319)     }
>        RANDOM(200),     { Random Y (Range 0-199)     }
>        RANDOM(256));    { Random Color (Range 0-255) } 
>   CloseGraph;
> END.
> 
> </code>
> 
> the fact is that i want Screen to point to an specific memory area
> (0xA000) for writing to the display directly...but i can't figure out
> how to make this
> 
> i've tried the following options
> 
> @Screen := $A000; -> mode13h.pas(34,5) Error: Can't assign values to an address
> Screen := MEM[$A000]; -> mode13h.pas(34,15) Error: Identifier not found "MEM"

Have you tried

   Screen := ScreenBufferPtr($a000);


-- 
Sly


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