<hardware, architecture> (After the IBM PC XT) An eight-bit
ISA bus architecture used by Intel 8086 and Intel 8088
systems in the IBM PC and IBM PC XT in the 1980s. It
predates the 16-bit ISA architecture used on the Intel 80286
based machines.
The XT bus has four DMA channels, of which three are brought
out to the expansion slots. Of these three, two are
normally allocated to machine functions:
DMA channel Expansion Standard function
0 No {dynamic RAM} refresh
1 Yes add-on cards
2 Yes {floppy disk} controller
3 Yes {hard disc} controller
(1997-09-15)
Nearby terms:
XSLT « XT « Xt « XT bus architecture » xterm » X terminal » XTI
