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DIMM Configurations
The 2156 system board has two DIMM sockets. A maximum of 256KB
memory may be installed.
You can install 16MB, 32MB, 64MB, or 128MB DIMM in any sockets and with
any combinations.
System Board Connector Pin Signals
Monitor Port Signals
Pin
Signal Name
1
Red Video
2
Green Video
3
Blue Video
4
No Connection
5
Synch Ground
6
Red Ground
7
Green Ground
8
Blue Ground
Serial Port Signals
Pin
Signal Name
1
Data Carrier Detect
2
Receive Data
3
Transmit Data
4
Data Terminal
Ready
5
Signal Ground
I/O
Pin
Signal Name
O
9
+5 V dc
O
10
Synch Ground
O
11
No Connection
N/A
12
Monitor ID Bit 1
N/A
13
Horizontal Synch
N/A
14
Vertical Synch
N/A
15
Monitor ID Bit 3
N/A
I/O
Pin
Signal Name
I
6
Data Set Ready
I
7
Request To Send
O
8
Clear To Send
O
9
Ring Indicator
N/A
I/O
N/A
N/A
N/A
I
O
O
I
I/O
I
O
I
I
5-15
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