User`s manual

Chapter 1 Hardware Configuration 15
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1.8.8Buzzer enable/disable (CN16)
Table 1-12: Buzzer enable/disable (CN16)
*Enable Disable
CN16
* default setting
1.9 Installing DRAM (SIMMs)
You can install anywhere from 8 to 128 MB of DRAM into your
PCA-6154/6154L. The card provides two 72-pin SIMM (Single In-line
Memory Module) sockets. Each socket accepts 4, 8, 16, 32 or 64 MB
SIMMs. DRAM access time ≤ 60 ns.
Note: For higher system stability two SIMM should be installed
when operating the PCA-6154/PCA-6154L
1.9.1 Installing SIMMs
NOTE: The modules can only fit into a socket one way. Their
gold pins must point down into the SIMM socket.
The procedure for installing SIMMs appears below. Please follow
these steps carefully.
1. Ensure that all power supplies to the system are switched Off.
2. Install the SIMM card. Install the SIMM so that its gold pins point
down into the SIMM socket.
3. Slip the SIMM into the socket at a 45 degree angle and carefully fit
the bottom of the card against the connectors.
4. Gently push the SIMM into a perpendicular position until the clips
on the ends of the SIMM sockets snap into place.
5. Check to ensure that the SIMM is correctly seated and all connector
contacts touch. The SIMM should not move around in its socket.