XT bus architecture (After the ) An eight-bit bus architecture used by and systems in the and in the 1980s. It predates the 16-bit ISA architecture used on the based machines. The XT bus has four channels, of which three are brought out to the . Of these three, two are normally allocated to machine functions: DMA channel Expansion Standard function 0 No refresh 1 Yes add-on cards 2 Yes controller 3 Yes controller (1997-09-15)
на заглавную 
к началу страницы