Re: MHz for 150

["Leif Svalgaard" <leif@xxxxxxxx>]

write a little MI-program:

CPYNV NN,1234;
ADDN(S) NN,1;
SUBN(S) NN,1;

repeat the above three instructions 33 times,
put a loop around these 99 instructions to execute them
a million times. Disassemble the program and count
RISC instructions for the loop. Assume one RISC
instruction per cycle. Divide the time it took by the
number of instructions. Then you have time per
instruction. If that time is 30 nanoseconds, you
have a 33MHz machine.

----- Original Message -----
From: Buck Calabro <buck.calabro@aptissoftware.com>
To: <MIDRANGE-L@midrange.com>
Sent: Monday, February 12, 2001 8:16 AM
Subject: RE: MHz for 150


> Leif, How did you measure the CPU speed?
>
> Buck
>
> > ----- Original Message -----
> > From: Leif Svalgaard <leif@leif.org>
> > Sent: Thursday, February 08, 2001 10:36 AM
> > Subject: MHz for 150
> >
> >
> > > I know that this is a meaningless number, but what *is* the
> > > MHz rating for the processor for an AS/400 model 150?
> > > (or maybe really: how many of these MHz can be used by
> > > a user program?).
> >
> > My own measurements seems to indicate 33 MHz as
> > being a good number. Anybody have a better one?
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