Generally speaking, PS/2s did not have a PCI bus either, although some of them did have an ISA bus.
(Both ISA and PS/2 microchannel would allow busmastering of exactly what your article describes, though, so the point might as well stand - for that matter, so would other buses like EISA and VESA local bus.)
Well yeah, PS/2 didn't have PCI, they got MCA. Then MCA-led takeover failed, and industry adopted PCI instead. That's the thought process. We'll have to come up with better wording, I guess
(Both ISA and PS/2 microchannel would allow busmastering of exactly what your article describes, though, so the point might as well stand - for that matter, so would other buses like EISA and VESA local bus.)