Booleans?
8 messages in this thread
Kevin,
The Amiga 2500 is not all that fast… The 2090A stil has the overscan
problems and the 2620/2 is not that fast… I have a RONIN board with a 20Mhz
881 and no 32-bit RAM… I compaired my system to a 2500 and was not
impressed!!! Here are my results…
Amiga 2000 CMI Amiga 2500 RONIN.
—————————————————————————–.
Eckel benchmark 994 1223 1917 2198.
CPU_Speed 1.00 1.03 1.73 1.89.
SI Amiga 1.0 1.7 4.6 4.6.
SI IBM 3.2 5.7 15.1 15.2.
(the following, lower is better) Sieve 45.50sec
44.78sec 21.86sec 18.48sec. Savage.IEEE 46.86sec
1.76sec 1.52sec 1.26sec. RAM_Speed (chip) 29.20sec
28.60sec 24.27sec 20.60sec. RAM_Speed (fast) 29.20sec
28.50sec 24.27sec 20.50sec.
I didn't believe the results!!! Even with 2MB of 32-bit ram the thing
was slower than my RONIN board!!! I am still thinking about getting a 2500
though, simply because it is will be a standard and that the 2620 can still
be booted with the 68000… If I did get the 2500, I would probably
replace the hard drive and controller with the GVP one since the 2090A is
VERY unreliable…
Yes, the 2620 is about 8% slower than the Ronin board. However, it is
done _right_, with the 32 bit ram mapped into the 16 meg address space so
that it is possible to DMA into and out of it. It is slower because of the
MMU, most likely, and if you look to the future of the Amiga, I think
you'll see that the MMU will play a large role. 2090A unreliable? Hardly!
Let me know when GVP figures out SCSI and removes the MaxTransfer
limitations.
Dear Larry- Funny that you should mention GVP and max transfer- I think I
have a problem with this- I want to increase my Maxtrans but don't know how
? I used the installation software, which was quick, simple, and easy for
nontechies like me, but I have been told that the subsequent problems I
have with my drive are due to a low maxtrans number as set by GVP. Can you
enlighten my at all on the subject
It's my understanding that the GVP will give you errors if the
MaxTransfer is set too high, or not set at all. The GVP requires a low (or
relatively low) MaxTransfer value in order to work properly.
I have no direct experience with the GVP unit, but I'm sure a question on
the Amigatech forum would draw a few answers for you.
Sorry about the 2090A problem… I had a 2090 and I HATE it!!! It
had those problems with the read write errors… As I understand it now,
the 2090A doesn't have that problem, except for a DPaintII slow-load
problem I read about in Amazing Computing November issue… Anyway, I'mm
seriously considering purchasing a 2500 now…
The read errors were corrected by the latest release of the driver (5 May
1988). The slowdown when using some programs is still not resolved as to
what the real problem is. My testing seems to show that the programs
themselves have a lot to do with it.
Do you know of a utility to get the MMU to cram Kickstart into 32 bit on a
2500? I'd be very interested to know if anyone out there has done one.
Dear Turbo Tim- Thank you for the benchmark results- I am having a heck of
a time deciding what to go with now ! I do love my GVP card, and would be
hard pressed to give it up. However, I have heard from one reliable source
that the GVP hardcard and the 2500 are not extremely compatible- something
about the GVP terminating the bus- that is not allowing the 2500 to read
any cards to the left of the GVP card ! Moving the GVP to a different slot
works, but the hardcard takes up two slots unless it is in the rightmost
slot ! Has anyone else heard of this, or is this an isolated incident? BTW,
have you run any Turbo Silver speed tests with Ronin vs CBM ? I must admit
that realworld numbers (i,e. the Sculpt3D coffee cup) on 68020/68881 stuff
makes more sense to this nontechie hacker !:-) And whats the difference
between a 68881 and a 68882 besides MHz ? or is it just speed