joel@peora.UUCP (Joel Upchurch) (09/12/86)
I have had some interesting results using a V20 instead of
an 8088 in my 8MHZ PC clone. I installed it last week, with
limited expectations, since the articles I'd read reported a
5 to 10% speedup for most applications.
After I installed it I noticed that most stuff was slightly
faster, but it seemed to me that some of the stuff under
Windows, especially Windows Write was a lot faster. It may
be my imagination, but the scrolling seemed to be much
faster. Near as I could time it pgdn and pgup in Write were
about 1.6 to 1.7 seconds, which is no worse than editing on
my 9600 baud terminal at work.
Also the screen seems to keep up with my typing much better.
there doesn't appear to be those annoying lags between the
keystroke and the screen being updated I'd noticed before.
I suspect that the cause may have something to do with the
Shift/Rotate/Mult/Div type instructions, which the V20 does
about 3 times faster than the 8088. If some of the low
level display formatting logic in Windows or Write uses
these instructions a lot, then the speedup might be a lot
more than one would expect from the 5-10% average.
Does anybody have any ideas on this? I'd run some
benchmarks, but switching the processor chips on my computer
is a bloody pain, since the socket is partially under the
hard disk drive.
Also running Windows off of a ram disk on a EMS board helps
a lot too, since Windows goes to the disk often.
Windows looks pretty good using an amber monitor with a
Hercules clone display adapter.
--
Joel Upchurch @ CONCURRENT Computer Corporation (A Perkin-Elmer Company)
Southern Development Center
2486 Sand Lake Road/ Orlando, Florida 32809/ (305)850-1031
{decvax!ucf-cs, ihnp4!pesnta, vax135!petsd, akgua!codas}!peora!joelgpw@ihdev.UUCP (G. P. Wilkin) (09/13/86)
> After I installed it I noticed that most stuff was slightly > > Windows, especially Windows Write was a lot faster. It may > be my imagination, but the scrolling seemed to be much > faster. Near as I could time it pgdn and pgup in Write were > about 1.6 to 1.7 seconds, which is no worse than editing on > my 9600 baud terminal at work. > Also the screen seems to keep up with my typing much better. > I suspect that the cause may have something to do with the > Shift/Rotate/Mult/Div type instructions, which the V20 does > about 3 times faster than the 8088. If some of the low > > Joel Upchurch @ CONCURRENT Computer Corporation (A Perkin-Elmer Company) > {decvax!ucf-cs, ihnp4!pesnta, vax135!petsd, akgua!codas}!peora!joel I too have noticed a very large increase in the speed of my terminal emulator. I am running a AT&T 6300 with an NEC V30 chip instead of a v20. I find this well worth the 15$ I spent on it. -- George Wilkin AT&T Network Systems, Naperville, IL !ihnp4!ihdev!gpw IH 4A-157 work 312-979-4317