Delphi Compiler Error
E2091 Segment/Offset pairs not supported in 32-bit Delphi
Reason for the Error & Solution
32-bit code no longer uses the segment/offset addressing scheme that 16-bit code used.
In 16-bit versions of Object Pascal, segment/offset pairs were used to declare absolute variables, and as arguments to the Ptr standard function.
Note that absolute addresses should not be used in 32-bit protected mode programs. Instead appropriate Win32 API functions should be called.
program Produce; var VideoMode : Integer absolute $0040 $0049; begin Writeln( Byte(Ptr($0040,$0049)^) ); end.
The following version compiles, but it does not run. You must avoid absolute addresses carefully.
program Solve; var VideoMode : Integer absolute $0040*16+$0049; begin Writeln( Byte(Ptr($0040*16+$0049)^) ); end.