On Wed, Jan 21, 2004 at 09:58:36PM -0700, Joel Rees wrote:
> I recall the 68k provided for peripherals putting a code that could be  
> used for a device code (so to speak) on the bus during the interrupt  
> response cycles. Did the nubus spec prevent using that, or was it just  
> Apple's corner-cutting?

I don't recall this, but the 68k does allow different interrupt levels.
The nubus interrupts are all wired together, though, into one interrupt
input on a VIA (or VIA-replacement) on the Mac.

-allen

-- 
 Allen Briggs                     briggs@wasabisystems.com
 Wasabi Systems, Inc.             http://www.wasabisystems.com/