asian1: For Automotive/car use it's not recommendable/optimal, cause it does not have desired chips.. In those environments you'll need to have specially designed chips with extra wide temparature range.. (see Freescale MPC5200 for comparision).
BillT: Yes.. it's possible to Stack various busses one after another .. but you should consider couple facts..
- Price .. each bus-bus bridge costs money and nees board space, wiring and support components.
- Speed. No matter how you'll add Pci-express atop of OLD Pci it's limited by the PCI bus as long as data needs to pass through it..
You'll can do the maths yourself .. This Troika card has *SINGLE* PCI-controller running at 33Mhz/32bit.. thus offering about 133MB/s theorethical max bandwidth.. Real delivery is only about 50-70% of maximun, so we can take 80MB/s. (megabytes)
Now we need to add together 2D/3D GFX-update-feed, Hard disk IO, USB, Ethernet etcetc.. and you'll soon see that sum will far exceed capabilities of single PCI-bus. (maths left for excercise to reader.. all numbers can be deduced or found on Web) :-)
PS: I know that in above i'll mention Maximum values, but it's proof enough ... It would be possible to analyze awerage needs, response time/real time conflicts (usually audio drivers) etc..
PS2: I'm not saying it would not work. I'm only trying to remind people not expecting miracle performance out of it.
PS3: Did some editing.. Hopefully i managed to fix more spelling mistakes than make a new ones.
