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From: neil@amiga.UUCP (Neil Katin)
Newsgroups: net.micro.amiga
Subject: Re: Serial Port speeds
Message-ID: <1251@amiga.amiga.UUCP>
Date: Mon, 2-Jun-86 22:21:23 EDT
Article-I.D.: amiga.1251
Posted: Mon Jun  2 22:21:23 1986
Date-Received: Wed, 4-Jun-86 06:48:03 EDT
References: <8605311901.AA02278@pavepaws>
Reply-To: neil@rocky.UUCP (Neil Katin)
Organization: Commodore-Amiga Inc., 983 University Ave #D, Los Gatos CA 95030
Lines: 19

In article <8605311901.AA02278@pavepaws> dillon@PAVEPAWS.BERKELEY.EDU (Matt Dillon) writes:
>	Here's a technical question (please don't answer unless you really
>know the answer... no answer is better than the wrong answer):  What is
>the overhead for interrupt service routines (say, the first service routine
>in a given chain)?
>
>					-Matt

These are the timings that I made a while ago for the 1.2 release.
They are significantly faster than for 1.1 (about 20%)

time from 68K interrupt acknowledge to processing of int handler: 33.5
time from int handler to first int server: 14 (only applies if this int
    is processed via an int server chain.  Serial ints are NOT processed
    this way, but I thought I'd give the time anyway.

The times are in microseconds.  Hope this helps.

	Neil