ISA (Industry Standard Architechture) Bus Connectors
This type of bus connection is the most common. ISA bus connectors will be found in all XT- and AT-class computers,
including Pentium motherboards. ISA bus connectors are black in color, and transmit either 8 or 16 bits of data at a time.
The shorter black connectors are 8-bit connectors, and the 2-part black connectors are 16-bit connectors. 8-bit cards can go
into 16-bit slots (connectors), but 16-bit cards should not be plugged into an 8-bit slot. ISA bus connectors pass data to and
from the CPU via the DMA (Direct Memory Access) and interrupt controllers located on the motherboard; these chips act as
"traffic cops", policing what data gets to the CPU, and in what order.

Pc Repair Northampton