Alpha Microsystems Eagle 250 Manuel de service télécharger pdf (Page 15)

Page 12 Eagle 250 Service Manual

Rev. 01

The following procedures describe how to remove and install the memory SIMMs, and set the memory

size jumpers.

Removing Memory SIMMs

To remove a memory SIMM from its connector:

Power down the computer. Remove the chassis cover and access the AM-138 board.

Press out on the metal retainer clips and gently tilt the top of the SIMM module, so it is free of

the metal retainer clips.

Lift the SIMM out of the connector

Installing Memory

The Eagle 250 supports from 4MB to 256MB of main memory: either one or two memory SIMMs of

4MB, 8MB, 16MB, 32MB, 64MB, or 128MB. Use 60ns SIMMs only; 70ns SIMMs will not work.

SIMMs do not have to be installed in pairs: you can use either one or two SIMMs; if you use two, they

do not have to be of equal size. For example, you can install one 32MB SIMM and one 16MB SIMM for

a total of 48MB of memory.

The memory SIMMs install in connectors J10 and J11. See Figure 4 for the location of these connectors.

If you’re installing only one SIMM, it goes in J10. If you’re installing two SIMMs of unequal capacity,

the larger one goes in J10.

To install memory expansion SIMMs on the AM-138 board, use this procedure:

Insert one SIMM (the larger if the SIMMs aren’t of equal capacity) in connector J10. Align pin-1

at the notched end of the SIMM module with pin-1 on the connector, as in Figure 8.

Insert the SIMM module into the connector at a slight angle.

Rotate into the upright position.

The SIMM will engage the metal retainer clips and click into position, locking the SIMM in

place.

If you are using two SIMMs, repeat steps 1 and 2 for the second one, at connector J11.

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Alpha Microsystems Eagle 250 Manuel de service Page 15