print lots of dots

/*
arm-linux-gnueabihf-gcc -fPIC -nostartfiles -nodefaultlibs -nostdlib dotty.S -o dotty
arm-linux-gnueabihf-objcopy -j.text -O binary dotty dotty.bin
arm-linux-gnueabihf-objdump -D -m arm -b binary dotty.bin
*/
	.text

	.global _start

_start:
	ldr		r1,=0x20064000

putc:
	mov		r0, #'.'
	str		r0, [r1]

putc_wait:
	ldr		r0, [r1, #20]
	ands	r0, #(1 << 6)		@ transmitter empty
	beq		putc_wait

	b		putc