1 nc
2 comp color
3 sync&lumin
4 r/w
5-16 db11-db0
17 dotx
18 dot y
19 comp snd
20 vss
21-34 a0-a13
35 pPhi1
36 pPhi2
37 option
38 Phi2 in
39 Phi1 in
40 Vdd

9000 ABBBBBBB
9001 CCCCCCCC
9002 HDDDDDDD
9003 GEEEEEEF
9004 GGGGGGGG
9005 HHHHIIII
9006 JJJJJJJJ
9007 KKKKKKKK
9008 LLLLLLLL
9009 MMMMMMMM
900A NRRRRRRR
900B OSSSSSSS
900C PTTTTTTT
900D QUUUUUUU
900E WWWWVVVV
900F XXXXYZZZ

A: interlace mode (6560 only): 0=off, 1=on
B: screen origin X (4 pixels granularity)
   6561-101: at 23 chars/line, the suitable range is 5 to 19
             this must be between 1 and 23, or the picture will mix up
             with the value 0, there is some disturbance on the screen bottom
C: screen origin Y (2 pixels granularity)
   6561-101: suitable range is 14 to 155=312/2-1, no wraparound
D: number of video columns
   6560 range: 0-27 (according to the PRG)
   6561-101: 0-29 makes sense, >32 will be interpreted as 32.
E: number of video rows
   6560 range: 0-23 (according to the PRG)
   6561-101: 0-35, >=36 will be interpreted as 35½
F: character size (1=8x16, 0=8x8)
G: raster value ($9004=raster compare register b8-b1, $9003 bit 7 = b0)
H: screen memory location ($9005:7-4 = b13-b10,
                           $9002:7 = b9 of screen and color memory)
I: character memory location (b13-b10)
* Note that b13 is connected to the inverse of A15 on the Vic-20.
J: light pen X
K: light pen Y
L: paddle X
M: paddle Y
N: bass switch,    R: freq f=Phi2/256/(255-$900a)
O: alto switch,    S: freq f=Phi2/128/(255-$900b)
P: soprano switch, T: freq f=Phi2/64/(255-$900c)
Q: noise switch,   U: freq f=Phi2/32/(255-$900d)
W: auxiliary color
V: volume control
X: screen color
Y: reverse mode
Z: border color

multicolor (character color b7=1)
00 = screen color
01 = character color
10 = border color
11 = auxiliary color

Color codes:
0 black
1 white
2 red
3 cyan
4 purple
5 green
6 blue
7 yellow
8 orange
9 light orange
a pink
b light cyan
c light purple
d light green
e light blue
f light yellow