Kreisen 3 8 6 X / X E - Manual (Page 145)

chassis, although you may need to unplug the disk drive ribbon
cable from its connector to allow easy access to the jumpers.
The system boards contains eight expansion slots comprised of
two basic types as follows:
l
Two 8-bit slot for PC/XT boards
l
Six 16-bit slots for PC/AT boards or 8-bit PC/XT boards
Figure 7-3. Installing the Circuit Boards
Expanding Your System 7-11