3.9 DRAM Installation
The mainboard can be installed with 1/2/4/8/16/32 MB 72 pin 60 or 70 ns
Fast Page or EDO (Extended Data Out)DRAM SIMM modules. The
DRAM memory system consists of 2 banks (0-1). Each bank requires 2
SIMM modules to achieve 64 bit bus transfer and proper operation. The
total memory size can be from 4MB to 128MB. Various DRAM configu-
rations are shown on the following table.
Each bank may use either 1-sided or 2-sided SIMMs.
All SIMMs must be Fast Page Mode DRAM or EDO DRAMs
with speeds less than or equal to 70ns. Parity or Non-Parity
SIMMS can be used. SIMM modules must be installed in pairs.
Refer to Fig. 3.2 for DRAM installation location. Pin-1 of the SIMM
module must match the Pin-1 of SIMM socket.
Insert the DRAM SIMM module into the socket at a 45 degree angle.
If the SIMM module is inserted on the wrong side, it can not be
plugged into the socket. After insertion, press the SIMM module in a
vertical direction until both left and right metal holders latch.
S1461/6-001-01
1 8
Bank 0
Bank1
Total
512kb x 32
None
4mb
512kb x 32
512kb x 32
8mb
1mb x 32
None
8mb
1mb x 32
512kb x 32
12mb
1mb x 32
1mb x 32
16mb
2mb x 32
None
16mb
2mb x 32
1mb x 32
24mb
2mb x 32
2mb x 32
32mb
4mb x 32
None
32mb
4mb x 32
1mb x 32
40mb
4mb x 32
2mb x 32
48mb
4mb x 32
4mb x 32
64mb
8mb x 32
None
64mb
8mb x 32
1mb x 32
72mb
8mb x 32
2mb x 32
80mb
8mb x 32
4mb x 32
96mb
8mb x 32
8mb x 32
128mb
