Important To Know Isa Slot

Isa Slot

The Isa Slot or Industry Standard Architecture, the acronym ISA bus is a parallel computer intended for connection, through the slots, the general expansion cards (video cards, sound cards, network cards, etc..) Usually installed inside the computer.

The ISA bus has been enhanced by the EISA standards, both in terms of performance now exceeded by newer buses like PCI, PCI X and PCI Express, and then not used by any other manufacturer.

The ISA slot was created in 1981 by IBM for its first personal computer with a microprocessor as its CPU, the IBM Personal Computer, and later used for the IBM Personal Computer XT, marketed since 1983. Initially having a bus width of 8 bits and a clock frequency of 4.77 MHz (the same as the microprocessor), was improved in 1984 with the launch of the IBM Personal Computer AT. The width of the bus was brought it to 16 bits and the clock frequency to 6 or 8 MHz (again the same as the microprocessor).

The two are different versions of the ISA SLOT as XT and AT bus in reference to computers that have been implemented.

To connect the expansion board is scheduled a special slot on the motherboard usually black. XT bus is scheduled for a slot to 62 contacts, while for the AT bus slots to 98 contacts.

PCI SLOT 

PCI EXPRESS SLOT

PCI EXPRESS