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Hardware Description 2-9
Motherboard
SIMMs The motherboard has two slots for SIMMs:
• FLASH: This connector takes a FLASH SIMM to increase the node’s FLASH
memory.
• Data Compression/Encryption: Set on its side, this connector take a SIMM to
provide data compression capabilities or a SIMM to provide encryption.
Caution
Be sure to place the FLASH, Data Compression, and Encryption SIMMs in the
correct slot. The SIMM Slots are physically identical. If you place the SIMM in the
wrong slot, the equipment can be damaged.
For information on installing or removing SIMMS, refer to the “DIMs, SIMMs,
DIMMs and Switches” section in Chapter 3.
DIMM The motherboard has a slot for a single SDRAM DIMM. The Vanguard 6435 comes
standard with a 16 Mbytes SDRAM DIMM. An option 32 Mbyte SDRAM DIMM is
also available. Below are the recommended configurations.
Vanguard 6435:
• SDRAM Expansion 16 Megabyte DIMM standard optional 32 Megabyte.
• 32 Megabyte is recommended when using the 8 Megabyte Flash SIMM.
Vanguard 6455:
• Vanguard 6455: Release 5.6 and greater the Vanguard 6455 ships with the
recommended 32 Megabyte DIMM installed.
• Any Vanguard 6455 equipped with 16MB SDRAM and 8MB FLASH SIMM
should be upgraded to 32MB SDRAM. 32Mbyte.
Switch No./Name On Off
1: Port 2 RI/TM Pin 22 is input on Port 2 Pin 22 is output on Port 2
2: Port 2 MB Pin 25 is input on Port 2 Pin 25 is output on Port 2
3: Port 1RI/TM Pin 22 is input on Port 1 Pin 22 is output on Port 1
4: Port 1MB Pin 25 is input on Port 1 Pin 25 is output on Port 1
5: Reserved — —
6: Default CTP — Off: Port 4 becomes 9600/
8/N, APAD, or ATPAD
7Not Used
8Not Used