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AR-B7041 User¡¦s Guide
3-6
3.3 JUMPER SETTING
Jumper pins allow you to set specific system parameters. Set them by changing the pin location of jumper blocks.
(A jumper block is a small plastic-encased conductor [shorting plug] that slips over the pins.) To change a jumper
setting, remove the jumper from its current location with your fingers or small needle-nosed pliers. Place the
jumper over the two pins designated for the desired setting. Press the jumper evenly onto the pins. Be careful not
to bend the pins.
We will show the locations of the AR-B7041 jumper pins, and the factory-default setting.
CAUTION: Do not touch any electronic component unless you are safely grounded. Wear a grounded wrist strap
or touch an exposed metal part of the system unit chassis. The static discharges from your fingers can
permanently damage electronic components.
3.3.1 Memory Type Setting (M1 ~ M4 & JP1)
Before installing the memory into memory sockets MEM1 through MEM8 you have to configure the memory type
which will be used (ROM/RAM) on the AR-B7041 card. Each jumper selects the memory type of four continuous
sockets.
You can configure the AR-B7041 as a (FLASH) EPROM disk (ROM only), a SRAM disk (SRAM only) or a
combination of (FLASH) EPROM and SRAM disk.
It is not necessary to insert memory chips into all of the sockets. The number of SRAM chips required depends on
your RAM disk capacity. The number of EPROM chips required depends on the total size of files that you plan to
copy onto the ROM disk and whether or not it will be bootable.
Insert the first memory chip into MEM1 if you are going to configure it as a ROM or SRAM disk. If you use a
combination of ROM and RAM, then insert the (FLASH) EPROM chip starting with the MEM1, and insert the
SRAM chips starting from the first socket which is configured as SRAM.
l M1: is used to configure the memory type of MEM1 to MEM2
l M2: is used to configure the memory type of MEM3 to MEM4
l M3: is used to configure the memory type of MEM5 to MEM6
l M4: is used to configure the memory type of MEM7 to MEM8
CAUTION: When the power is turned off, please note the following precautions.
1. If your data has been stored in the SRAM disk, do not change the jumper position or data will be
lost.
2. Make sure jumpers are set properly. If you mistakenly set the jumpers for SRAM and you have
EPROM or FLASH installed, the EPROM or FLASH will drain the battery’ s power.