Aeron SBC-350A Specifications download pdf (Page 48)

42 SBC-350A User's Manual

Installing DRAM (SIMMs)

You can install anywhere from 1 MB to 16 MB of on-board

DRAM memory using 256 KBx9, 1 MBx9 or 4 MBx9 SIMMs

(Single In-line Memory Modules). Access time should be 70 ns or

less.

Memory installs in one bank composed of four SIMM sockets. See

the figure on page 5 for help identifying the banks. You must fill all

four sockets, and all SIMMs must be of the same capacity, i. e. you

cannot mix 256 KB SIMMs with 1 MB SIMMs. The following

table shows the memory size for different SIMM capacities:

System memory size SIMM size and number

1 MB 256 KB x 4 pcs

4 MB 1 MB x 4 pcs

16 MB 4 MB x 4 pcs

The procedure for installing SIMMs appears below. Please follow

these steps carefully.

1. Locate the CPU card’s memory banks, shown in the figure on

page 5.

2. Install the SIMM cards. Install each SIMM so that its chips face

away from the CPU and its gold pins point down into the

SIMM socket.

3. Slip each SIMM into a socket at a 45 degree angle and careful-

ly 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 each SIMM is correctly seated and all

connector contacts touch. The SIMM should not move around

in its socket.

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Aeron SBC-350A Specifications Page 48