Return carriage to home position 0x343 > 0x16


Readable registers

0x342 = Status register
 BIT 3 = set if carriage at home position
 BIT 7 = set if lamp is on

 value - 0xb3 = carriage not at home = BIT 3
         0xbb = carriage at home = BIT 3
       - 0xff = scanner off


0x344 = memory data register
0x347 = memory index register 2


The lamp turns off automatically after some time



Scanning (peview)
initialize somehow??

repeat 27 times (to get one line (424B) of image data)
	wait until 0x347 bit 3 is clear
	read 16 bytes from 0x344 (only 8 bytes if it's the last time)

wait until 0x347 bit 1 is set AND then wait until it's clear
read status register 0x342 (returns B3)
0x345->0x17	(enable SRAM access with autoincrement read&write?)
0x343->0xdc	(move a step forward?)
0x341-> d0 3xno c1 3xno d2 3xno c0 3xno d1 3xno c2 3xno (repeat)
wait until 0x347 bit 1 is set AND then wait until it's clear
read status register 0x342 (returns B3)
0x341->0xd1	d2	d0	d1	c2	c0	c1	c2	d0	d1	d2	d0	c1	c2	c0	c1
0x341->0xd5	d6	d4	d5	c6	c4	c5	c6	d4	d5	d6	d4	c5	c6	c4	c5
0x340->0x5a	73	64	5a	73	64	5a	73	64	5a	73	64	5a	73	64	5a
0x341->0xd1	d2	d0	d1	c2	c0	c1	c2	d0	d1	d2	d0	c1	c2	c0	c1
0x340->0x0e	00	10	0e	00	10	0e	00	10	0e	00	10	0e	00	10	0e
read 0x346 (0xFF)
0x345->0x17
0x347->0x72	51	62	51	62	51	62	51	62	51	62	51	62	51	62	51
0x345->0x1f	
0x343->0xdc	(move a step forward?)
0x345->0x1f
0x345->0x1f
0x345->0x1f
0x347->0x52	61	52	61	52	61	52	61	52	61	52	61	52	61	52	62
read 0x345 (0xFF)