Cypress makes an embedded host:
http://www.cypress.com/?mpn=SL811HST-AXC
They used to supply it in a 28pin PLCC package, but I think that one has
been discontinued... But it is still in production, it is a 3.3V part, but
it is 5V compatible. So this chip, in combination with a USB power switch
(Maxim and TI sell them - amongst others) allows a single USB 1.1 port on
the machine. But nothing is there to prevent you to put multiple chips on
the board, or a USB hub... (but 1.1 chips are getting harder and harder to
obtain)
NXP used to have ISP1362 and ISP1761 - they sold them to ST-Ericsson
http://www.ebv.com/en/products/categories/details/product/isp1362.html
But I don't think there is really an ISA usb card available... But then
designing an isa card is not too hard...
Maurice
It would be easier to interface an embedded device type of USB host
controller such as the ISP1161 to an ISA or PCMCIA
bus, but then you
would still have to find device specific drivers for whatever OS you
were trying to use with the controller. That link for the EB1161ISA
ISP1161 ISA board says "This is a legacy product that has not been
manufactured for an extended period of time."