15
SIMM
The SIMM (Single In-line Memory Module) sockets are divided into two
banks on the system board, Bank 0 and Bank 1. Each bank consists of
2 SIMM sockets.
You will need either 2 or 4 pieces of SIM modules, depending on the
amount of memory you intend to install. The system board will not work
if you install 1 or 3 pieces. Make sure you insert the same type of
SIMMs in one bank. You can install SIMMs in either of the banks, Bank
0 or Bank 1, but you must populate one bank first before going to the
next bank.
The 586TXD system board can support 8MB to 256MB of memory us-
ing 1MBx32, 2MBx32, 4MBx32, 8MBx32, or 16MBx32 72-pin SIMMs.
The table on the next page shows the supported SIM modules and their
corresponding memory sizes.
Installing the DIM Module
A DIM module simply snaps into a socket on the system board. Pin 1 of
the DIM module must correspond with pin 1 of the socket.
1. Pull the “tabs” which are at the ends of the socket to the side.
2. Position the DIMM above the socket with the “notches” in the mod-
ule aligned with the “keys” on the socket.
3. Seat the module vertically into the socket. Make sure it is com-
pletely seated. The tabs will hold the DIMM in place.
Pin 1
Notch
Key
Tab
Tab
