I remember it well. There was a lot of talk about CHRP, but in the end, Apple released no Macs that were fully based on it. The 4400 had the same Apple designed Tanzania motherboards [1] as Motorola used in some of their StarMax machines [2]. Those boards had support for commodity PC ports like PS/2 and parallel, as well as Apple's ports. The Power Macintosh 4400 did not have parallel or PS/2 connectors. It had ADB and GeoPort serial ports [3].

I considered getting a 4400, but I ended up spending a little more on a 7300, which was a way better computer.

[1] http://web.archive.org/web/20010726184243/http://www.macuser...

[2] http://en.wikipedia.org/wiki/Motorola_StarMax

[3] http://www.forevermac.com/1997/02/performa-4400160mhz-comput...