Dave Engvall wrote: > > Anyone really remember how many interrupts an 11 really had. I'm > thinking 256 but haven't found the book to confirm that. > I think it was actually unlimited, up to filling the entire address space. Now, off the shelf boards didn't support that, and some of the early CPUs may not have, either. But, I'm fairly sure that on later machines you could actually use 1024 different interrupt vector addresses, which would take up 4096 bytes of memory. Many of the later boards such as comm multiplexers and Ethernet boards had writable interrupt vector addresses, and the system put them at the high end of the vector address space. (My memory may also be contaminated by VAX information.)
Jon ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
