fun setup_alt
	do
		ds = [d4,d5,d6,d7]

		rs.fsel = new FunctionSelect.outp
		en.fsel = new FunctionSelect.outp
		d4.fsel = new FunctionSelect.outp
		d5.fsel = new FunctionSelect.outp
		d6.fsel = new FunctionSelect.outp
		d7.fsel = new FunctionSelect.outp

		rs.write(false)
		en.write(false)

		# wait 20ms for power up
		50.bcm2835_delay

		write_4bits(true,true,false,false)
		write_4_bits(3)

		5.bcm2835_delay

		write_4bits(true,true,false,false)
		write_4_bits(3)

		5.bcm2835_delay

		write_4bits(true,true,false,false)
		write_4_bits(3)

		200.bcm2835_delay_micros

		write_4bits(false,true,false,false)
		write_4_bits(2)

		# wait 5ms
		5.bcm2835_delay

		# set interface
		# 4bits, 2 lines
		function_set(4, 2, 8)

		# cursor
		# don't shift & hide
		display_control(true, true, true)

		# clear & home
		clear

		# set cursor move direction
		# move right
		write(true, 6)

		# turn on display
		write(true, 4)

		# set entry mode
		entry_mode(true, true)
	end