The inline assembler has found an error in the numeric constant you entered.

program Produce;

  procedure AssemblerExample;
  asm
    mov al, $z0f0
  end;

begin
end.

In the example above, the inline assembler was expecting to parse a hexadecimal constant, but it found an erroneous character.

program Solve;

  procedure AssemblerExample;
  asm
    mov al, $f0
  end;

begin
end.

Make sure that the numeric constants you enter conform to the type that the inline assembler is expecting to parse.