IBM 5155 User Manual

22 Compare your coprocessor with the one in the
figure below. Find the notch in your
coprocessor safety protector shown in the figure.
This notch must face the 8088 processor and be
toward the rear of the system board.
If this is
not possible, the safety protector was not
assembled correctly. Go back to step 19.
Warning:
• The coprocessor is static sensitive.
Maintain personal grounding by touching
the system frame with one hand while
installing the coprocessor.
• Incorrect placement of the coprocessor
can result in damage to the system board
or the coprocessor.
• The pins
on the coprocessor are easily
bent.
23 Carefully align the pins to the connector and
firmly press the coprocessor into place.
Rear
Option Installation 4-21

IBM 5155 Specifications

General

Model	IBM 5155
Category	Desktop
Release Year	1984
CPU	Intel 8088
Clock Speed	4.77 MHz
Display	9-inch monochrome CRT
RAM	256 KB, expandable to 640 KB
Storage	One or two 5.25" 360KB floppy disk drives
Graphics	CGA (Color Graphics Adapter)
Ports	Parallel, Serial, Keyboard
Operating System	IBM PC DOS
Weight	30 pounds (13.6 kg)