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Ethernet Base ModulePassport 4400 Hardware Installation Manual
3-8
16 Mbyte DRAM
The Passport 4400 offers an optional 16 Mbyte DRAM SIMM (NTAU95AA)
offers an optional is needed for software version 3.1 and above. For instructions
on removing and installing the SIMM, refer to Removing and Installing SIMMs
on page 3-10.
Figure 3-9. 16 Mbyte DRAM SIMM
The correct E21 and E23 jumper block positions for the 16 Mbyte DRAM SIMM
is 4M, (as opposed to 1M for the 8 Mbyte DRAM SIMM) as shown in Figure 3-10.
Note:
When installing the 16 Mbyte DRAM SIMM, you must have
the E21 and E23 jumpers (2 each) set in the correct position
(4M) for your unit to boot up after installation.
Use a pair of small needle-nose pliers when making changes to the jumper
settings. Carefully lift each jumper block and place it over the appropriate pins.
See Figure 3-10 for location of E21 and E23 jumpers.
Figure 3-10. Location of 16 Mbyte DRAM SIMM Connector and Jumper Settings
4M
Top View of E21 and E23 Jumper
Jumper Settings for
16 Mbyte DRAM SIMM
16MB DRAM SIMM
(J6 Connector)
E21 and E23 Jumpers
Front
1M
Jumper Settings for
8 Mbyte DRAM SIMM
Jumper Blocks (4)
Front of Unit
E21
E23
4M
Top View of E21 and E23 Jumper
Front of Unit
E21
E23
1M
E21 (2)
E23 (2)