Atari PC Owner's Manual page 63

Follow these steps to install the chips:
1. To ensure a good fit, press the pins on one side of a chip against a
flat surface to bend them slightly towards the center of the under­
side of the chip. The pins should be at a 90-degree angle with the
top of the chip. Bend the pins on the other side of the chip in the
same way. Repeat for each chip you are installing.
2. Find the correct socket in the illustration below for the chip
you're installing. Facing the front of the computer, hold the chip
so the notch is on the left (the notch on the chip should match
the notch on the socket). Line up the pins on the chip with the
holes in the socket and gently push the chip into the socket. Be
careful not to bend the pins. ( If you do bend the pins, gently remove
the chip and carefully bend the pins back into their original position.
Then reinsert the chip.) Repeat for each chip you're installing.
Chip Sockets Inside Hatch
Jumper
E3
OLJ
57
a
G
[l
C-=:J
L--=i
0
-, -]
RAM Chip