Upgrading Cache Memory; Cache Type - American Megatrends Apollo User Manual

6

Upgrading Cache Memory

If your Apollo Pentium PCI ISA motherboard has 256 KB of secondary cache memory, you can upgrade to
512 KB of cache memory. See the following steps.

Cache Type

Use 3.3V SRAM in the cache memory sockets. The recommended 15 ns 3.3V 64 KB x 8 DIPs are:
Vendor Type Part Number
Micron 32 x MT5LC2568
8
Samsung 32 x KM68257CP
8
Samsung 32 x KM68257P
8
Alliance 32 x AS7C3256PCM
8
Toshiba 32 x TC55V328P
8
Winbon 32 x W24M257AK
d 8
UMC 32 x 61M256AH
8
ISSI 32 x 61LV256
8
Upgrade Steps
Step
1
2
3
4
Chapter 6 Upgrading Cache Memory
Packag Vcc I/O
e
DIP 3.3V 3.3V
DIP 5V 3.3V
5V
DIP 3.3V 3.3V
DIP 3.3V 3.3V
DIP 3.3V 3.3V
DIP 5V 3.3V
5V
DIP 5V 3.3V
5V
DIP 3.3V 3.3V
Action
Turn the system off. If the motherboard is already installed in a
computer case, remove the cover and expose the motherboard.
Make sure you are properly grounded to prevent electrostatic
discharge. Remove the DIPs in sockets M1 through M8. See the
drawing on the previous page for the M1 through M8 locations.
Install the new 64 KB x 8 3.3V SRAM DIPs in sockets M1
through M8. Make sure that Pin 1 of the sockets matches Pin 1 of
the SRAM DIPs. The end of the DIP that has a notch or a dot
indicates Pin 1. Pin 1 of the socket is printed on the motherboard
and is indicated on the motherboard drawing on the previous page.
Press the DIPs firmly but slowly into each socket.
Install a 5V 32 KB x 8 SRAM DIP in M9. M9 is the tag RAM
socket.
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