GA144 Instruction Timing

From	rickman <gnuarm@gmail.com>
Newsgroups	comp.lang.forth
Subject	GA144 Instruction Timing
Date	2012-08-11 18:54 -0400
Organization	A noiseless patient Spider
Message-ID	<k06nr6$9bh$1@dont-email.me> (permalink)

Show all headers | View raw

Anyone know the timing of a unext instruction when it is looping?  I 
think it would just be 2.4 ns with no adder for the instruction fetch 
since there would be no instruction fetch.

The data book talks about the "Empty micronext time" which seems to be 
the time for the unext instruction with no other code in the loop 
regardless of whether it loops or not.  They also talk about an empty 
next time, but this is separate from the "non-empty next time" along 
with "jump time".  I guess the time for the jump if the code falls 
through would be the same if it aborts the prefetch in all cases even if 
it could take advantage of prefetch.

Funny, every time I look at this chip I learn something new about how it 
works.  It would be nice if it were written out clearly enough that I 
didn't need so many passes through the manual.

At least I feel like I am getting somewhere with it.

Rick

Back to comp.lang.forth | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-11 18:54 -0400
  Re: GA144 Instruction Timing Paul Rubin <no.email@nospam.invalid> - 2012-08-11 17:40 -0700
    Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-12 19:00 -0400
      Re: GA144 Instruction Timing johnmdrake@gmail.com - 2012-08-14 10:17 -0700
        Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-15 18:57 -0400
  Re: GA144 Instruction Timing RR <freedomspyder@gmail.com> - 2012-08-22 07:11 -0700
    Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-22 10:33 -0400
      Re: GA144 Instruction Timing RR <freedomspyder@gmail.com> - 2012-08-22 12:46 -0700
        Re: GA144 Instruction Timing Jason Damisch <jasondamisch@yahoo.com> - 2012-08-22 13:10 -0700
          Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-22 18:10 -0400
          Re: GA144 Instruction Timing Paul Rubin <no.email@nospam.invalid> - 2012-08-23 00:03 -0700
            Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-23 19:57 -0400
              Re: GA144 Instruction Timing Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-24 16:29 +0200
                Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-27 18:33 -0400
                Re: GA144 Instruction Timing Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-28 02:45 +0200
                Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-27 21:41 -0400
                Re: GA144 Instruction Timing Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-28 22:07 +0200
                Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-28 18:25 -0400
                Re: GA144 Instruction Timing Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-29 01:41 +0200
                Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-29 16:43 -0400
                Re: GA144 Instruction Timing Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-30 02:13 +0200
                Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-30 15:07 -0400
                Re: GA144 Instruction Timing Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-30 23:11 +0200
                Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-09-01 15:15 -0400
        Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-22 18:05 -0400
          Re: GA144 Instruction Timing RR <freedomspyder@gmail.com> - 2012-08-22 15:46 -0700
  Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-09-02 17:21 -0400

csiph-web