Commodore 128 Programmer's Reference Manual page 561

THE COMMODORE 128 AND COMMODORE 64 MEMORY MAPS 551
HEX
D418
D419
D41A
D41B
D41C
D500-D7FF
D800-DBFF
DCOO-DCFF
DCOO
DC01
DC02
DC03
DC04
DC05
DC06
DECIMAL
54296
54297
54298
54299
54300
54528-55295
55296-56319
56320-56575
56320
56321
56322
56323
56324
56325
56326
BITS
0
7
6
5
4
3-0
7-0
7-6
4
3-2
3-0
7-0
7
6
4
£-2
3-0
DESCRIPTION
Filter Voice 1 Output: 1 = Yes, 0 =
No
Select Filter Mode and Volume
Cut-Off Voice 3 Output: 1 = Off, 0
= On
Select Filter High-Pass Mode: 1 =
On
Select Filter Band-Pass Mode: 1 =
On
Select Filter Low-Pass Mode: 1 = On
Select Output Volume: 0-15
Analog/Digital Converter: Game
Paddle 1 (0-255)
Analog/Digital Converter: Game
Paddle 2 (0-255)
Oscillator 3 Random Number
Generator
Envelope Generator 3 Output
SID IMAGES
Color RAM (Nybbles)
MOS 6526 Complex Interface
Adapter (CIA) #1
Data Port A (Keyboard, Joystick,
Paddles, Light-Pen)
Write Keyboard Column Values for
Keyboard Scan
Read Paddles on Port A / B (01 =
Port A, 10 = Port B)
Joystick A Fire Button: 1 = Fire
Paddle Fire Buttons
Joystick A Direction (0-15)
Data Port B (Keyboard, Joystick,
Paddles): Game Port 1
Read Keyboard Row Values for
Keyboard Scan
Timer B: Toggle/Pulse Output
Timer A: Toggle/Pulse Output
Joystick 1 Fire Button: 1 = Fire
Paddle Fire Buttons
Joystick 1 Direction
Data Direction Register—Port A
(56320)
Data Direction Register—Port B
(56321)
Timer A: Low-Byte
Timer A: High-Byte
Timer B: Low-Byte