Xycom XVME-678 Manual page 41

2 Mhytes
Metmry
XVME-678/688 Manual
July 1994
The 2 Mbyte version has 1.64 Mbytes of DRAM divided as 640 Kbyte and 1 Mbyte blocks. The
additional 384 Kbytes of DRAM are dedicated for Shadow RAM and are not relocatable. Because this
configuration uses only two SIMMs, there is no interleaving. This configuration tends to be less optimal
for performance than the other memory configurations.
Two IMx9 SIMMs are needed for the 2 Mbyte configuration.
4 Mbytes
Metmry
The 4 Mbyte version has 3.64 Mbytes of DRAM divided as 640 Kbyte and 3 Mbyte blocks. The
additional 384 Kbytes of DRAM are dedicated for Shadow RAM and are not relocatable.
Four IMx9 SIMMs are needed for the 4 Mbyte configuration.
10
Mbytes
Metmry
The 10 Mbyte version has 9.64 Mbytes of DRAM divided as 640 Kbyte and 9 Mbyte blocks. The
additional 384 Kbytes of DRAM are dedicated for Shadow RAM and are not relocatable. Because this
configuration uses two SIMMs of different sizes, there is no interleaving. This configuration tends to be
less optimal for performance than the others.
Two 4Mx9 SIMMs and two IMx9 SIMMs are needed for the 10 Mbyte configuration.
16
Mbytes Metmry
The 16 Mbyte version has 15.64 Mbytes of DRAM divided as 640 Kbyte and 15 Mbyte blocks. The
additional 384 Kbytes of DRAM are dedicated for Shadow RAM and are not relocatable.
Four 4Mx9 SIMMs are needed for the 16 Mbyte configuration.
Installation ProcedlO'e
1. Turn off power to the XVME-678/688.
2. Refer to Table 2-16 on page 2-21 and select the appropriate type of SIMMs for your memory
configuration, and install them into the appropriate banks.
3. Refer to Figure 2-4 on the next page. For easiest access to the SIMM sockets, install the strips in
the sockets from right to left (referenced with PI and P2 facing down). Insert the contact edge of
the SIMM strip into the socket with the chips on the strip facing up. Be sure the edge of the strip
is aligned in the socket. Press down firmly on the strip until it snaps into place.
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