Epson Pollution Preventer User Manual page 51

SIMM configurations (continued)
Before you install SIMMs, check the following guidelines to
ensure that they will work properly:
SIMMs that operate at an access speed of 80ns
(nanoseconds) or faster. Be sure all the SIMMs operate at
the same speed.
memory you want. See the table above.
3-10 Installing and Removing Options