8 Oct
2011
8 Oct
'11
5:10 p.m.
On 8 Oct 2011 at 16:32, Glen Slick wrote:
But the original iMac without a built in floppy drive
did do a lot to
boost the interest in USB floppy and USB Zip drives at the time.
The first USB device I worked with was the Intel 8x930Ax eval board.
Basically an 80251 core with an on chip USB SIE. I don't know if
anyone makes an 80251 core USB controller anymore.
I still have a pile of HID-type USB devices using 82930A3 chips.
They work with the 430HX motherboards and pretty much nothing else.
No "B" side connection--the cable is attached directly to the device.
Mostly, I've scavenged them for the very nice Toshiba LCD displays
(separate PCB, so scavenging's mostly a matter of unscrewing and
unplugging).
Given how far uCs have come since the 80251 and the advent of USB 2
and 3, I doubt that anyone's still using it. It seems that
manufacturers toss in at least a USB 2.0 interface into most of their
controllers out of habit.
--Chuck