Error 10500

Hello,

this my 1st project involve vhdl.this project,my supervisor wants me to use up3 board,receive 8 bit data from ADC, process it and display through visual basic(PC)..

this what i got so far..if the problems is too obvious,im still amateur bro..

1. i got error 10500 a lot

2. how to communicate up3 board using serial,did it still need vhdl code?

library ieee;

use ieee.std_logic_1164.all;

use ieee.std_logic_unsigned.all;

entity up3_board is

port( datain_adc: IN STD_LOGIC_VECTOR(7 downto 0);

clock: IN STD_LOGIC; -- Clock Input from Altera Board

dataout_serial: OUT STD_LOGIC_VECTOR(7 downto 0));

end up3_board;

architecture BEHAVIOR of up3_board is

IF RISING_EDGE(clock) THEN

PROCESS(clock,datain_adc)

BEGIN

if datain_adc='00000000'--data from ADC,not correct yet..

then

dataout_serial<="00000000";--serial output in binary..not correct yet

elsif datain_adc='00000001'

then

dataout_serial<="00010000";

elsif datain_adc='00000010'

then

dataout_serial<="00010101";

elsif datain_adc='00000011'

then

dataout_serial<="00010110";

elsif datain_adc='00000100'

then

dataout_serial<="00010111";

elsif datain_adc='00000101'

then

dataout_serial<="00011000";

elsif datain_adc='00000110'

then

dataout_serial<="00011001";

elsif datain_adc='00000111'

then

dataout_serial<="00011010";

elsif datain_adc='00001000'

then

dataout_serial<="00011010";

elsif datain_adc='00001001'

then

dataout_serial<="00011010";

elsif datain_adc='00001010'

then

dataout_serial<="00011010";

elsif datain_adc='00001011'

then

dataout_serial<="00011010";

end process;

end BEHAVIOR;