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Upgrading Cache Memory,
Upgrade Procedure
Continued
Step
1
Move all SW1 switches to ON.
2
Remove all old SRAM chips from U31, U32, U34, U37, U39,
U41, U42, U44, U45, U46, and U47.
3
Place the new 24-pin 64 KB x 4 static RAM chips in U31,
U34, U37, U39, U41, U42, U44, U45, U46, and U47. Make
sure that the pins are straight and that all pins are inserted in
the receptacles.
Do not install a Static RAM chip in U32 when upgrading to
256 KB cache memory.
4
Turn the system on. The Boot Screen should display 256 KB
of cache memory. If 256 KB does not display, check for bent
pins on the new SRAM chips.
Action
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