Datatech Enterprises 386/25, User Manual

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Onboard System Memory Size
The PEMT2630 mainboard can accommodate up to 8MB DRAM on-
board of module RAM (41256,44256 end 411000 types).
If necessary, the PEI-306 RAM Board can increase system memory to
a total of 16MB.
The PEM-2630 has a 30-pin single-in-line socket for SIP module RAM.
Remember that when module RAM is inserted into the sockets, you
must make sure that pin 1 of a module is lined up with pin 1 of its
socket. Remove any static charge from your body before touching the
module. Gently push the module RAM into the socket, and be careful
not to bend the pins.
N o t c h
— RAM Module
— RAM Module
S o c k e t
F i g u r e 2 - 1 0 : I n s t a l l i n g t h e S I P M o d u l e
J u m p e r
A jumper is a kind of switch which uses a plastic cap with a metal
interior to connect (short) two pins. If a jumper needs to be left open,
you should save the cap for Mure use by covering one pin only of a
jumper. This has no effect on the function of the board while it keeps
the cap handy. The illustration below shows the side and top views of
a three-pin jumper in which pins two and three are shorted.
Side View
Top View
I
Pin 1
Figure 2-11: An Example of Three-Pin Jumper Setting
Chapter 2: Setting Up Your System
13