Industry Standard Architecture
16-BIT INTERNAL BUS OF IBM PC/AT
AT bus architecture; XT bus architecture; Industry standard architecture; ISA bus; PC-AT bus; AT Bus; ISA slot; XT interface; XT bus; AT bus; ISA card; Industry Standard(s) Architecture; ISA port; ISA backplane bus
<
architecture, standard> (ISA) A
bus standard for {IBM
compatibles} that extends the
XT bus architecture to 16
bits. It also allows for
bus mastering although only the
first 16
MB of
main memory is available for direct access.
In reference to the XT bus
architecture it is sometimes
referred to as "AT bus
architecture".
Compare
EISA,
MCA.
(1996-06-25)