Subject: Re: USB input devices?
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From: Rubywand <rubywand@swbell.net>
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Date: Fri, 29 Jan 1999 03:15:18 -0600
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Michael Crane writes ...
> 
> On 28 Jan 1999 22:08:15 GMT, jacc7621@aol.com (JACC7621) wrote:
> 
> >Those adb-usb converters are for using a adb peripheral on an iMac.
> 
> I thought as much.  Making an ADB device function on an USB bus is far
> more technologically feasible than making a USB device function on an
> ADB bus.  It's a simple function of data speed - ADB to USB only has
> to send data on the USB bus when there's data available from the ADB
> device, but a USB to ADB device would have to slow many USB devices
> down to the speed of the ADB bus!
 ....

     Yes; USB is a fast bus and ADB is pretty slow. As you mention, some
stuff being designed for a USB connection would choke ADB.

     USB peripherals which duplicate the function of current ADB
peripherals could be interfaced to ADB without much hassle. The IC's
seem to be fairly cheap; so, an interface to handle USB-->ADB
translation could be of interest just as a way to access new
replacements for KB's, mouses, etc..

     Still, the main interest in USB is USB-->Apple2-- i.e. directly,
rather than USB-->ADB-->Apple2. Going with USB could significantly
reduce the cost of producing a high-quality expansion for the IIgs.



Rubywand