Commodore 128D - Page 365

Rear Connections
4. Disk Drive Reset Button—Resets disk drive.
5. Reset Button—Resets computer and disk drive (warm start).
6. Expansion Port—This rectangular slot is a parallel port that
accepts program or game cartridges as well as special
interfaces.
Cartridge Expansion Slot
Pin
12
1.3
14
15
16
17
18
19
20
21
22
Pin
N
P
R
S
T
U
V
w
X
Y
z
Type
BA
DMA
D7
D6
DS
D4
D3
D2
D1
DO
GND
Type
A9
A8
A7
A6
A5
A4
A3
A2
Al
A0
GND
22 21201918 17161514 1312 1110 9 8 7 6 5 4 3
Z V XWVUTSRPNMLK JHFEDCBA
(view of port from the back of the C128)
Pin
1
2
3
4
5
6
7
8
9
10
11
Pin
A
B
C
D
E
F
H
J
K
L
AA
Type
GND
+5V
+5V
IRQ
R/W
Dot Clock
I/O 1
GAME
EXROM
I/O 2
ROAAL
Type
GND
ROMH
RESET
NMI
S 02
A15
A14
A13
A12
All
A10
359 APPENDIX C—Connectors/Ports for Peripheral Equipment