Load the data as follows:
type RamType is array(0 to 7) of bit_vector(31 downto 0);
impure function InitRamFromFile (RamFileName : in string) return RamType is
FILE RamFile : text is in RamFileName;
variable RamFileLine : line;
variable RAM : RamType;
begin
for I in RamType'range loop
readline (RamFile, RamFileLine);
read (RamFileLine, RAM(I));
end loop;
return RAM;
end function;
signal RAM : RamType := InitRamFromFile("rams_20c.data");