From: utzoo!decvax!pur-ee!iuvax!isrnix!greg
Newsgroups: net.unix-wizards
Title: DH vs. DZ
Article-I.D.: isrnix.148
Posted: Tue Sep 14 14:37:40 1982
Received: Wed Sep 15 05:42:07 1982

A sidenote to the recent DZ <-> DH debate. We used to run a single
8 line DZ-11 on our 11/44 and were forced to run terminals at speeds
no greater than 2400 baud to avoid nailing the system with interrupts.
We now have an able DH/DM (16 lines) in addition to the DZ-11 (and
hopefully we will get another DH/DM) and run the DH terminals at
9600->19.2k baud..From what little benchmark data I could get
it seems that the DH at 9600 baud and twice as many terminals has an
overall system impact of only 1/4 to 1/2 that of the DZ. Another thing
I did was to increase the CLIST block size from 14 to 30 characters to
increase DMA efficiency....
			Greg Travis
			pur-ee!isrnix!greg