wolff@cs.purdue.EDU (Robert M. Wolff) (01/25/89)
From article <6319@polya.Stanford.EDU>, by rokicki@polya.Stanford.EDU (Tomas G. Rokicki): > Nope. My Ronin board has one wait state. Ronin claims I can change an > R/C time constant to run it at 0 wait states, but not only do I need 80ns > RAMs to do it, they can't guarantee that it will work. Not very > reassuring. > > -tom Speaking of 68020 boards...There is one out from CMI that sticks into the 68000 socket and has a socket for an 881. It retails for $199. And I was wondering if anyone had heard what kind of performance it was getting?? I need SOME speed up, but would I be better off building the lucas board?? Thanks, bob -- -=-=-=- Insert Standard Disclaimer Here, Please... -=-=-=- /************* MS-Dos? Me? No, You must be mistaken! *************/
rg20+@andrew.cmu.edu (Rick Francis Golembiewski) (01/26/89)
From articale <5894@medusa.cs.purdue.edu>, by wolff@cs.purdue.EDU (Robert M. Wolff): >Speaking of 68020 boards...There is one out from CMI that sticks into >the 68000 socket and has a socket for an 881. It retails for $199. >And I was wondering if anyone had heard what kind of performance it >was getting?? First of all this board is NOT a 68020, but a 68000 (running at 16Mhz), so don't expect too much of a speedup. Also, the 68881 is not used as a true co processor (the 68000 doesn't support a math co-processor, alsothough the '20 does...), so there is some extra hardware (and config. software) to get it working, thus it is a lot slower then a '20/881 combination. However if you just need a bit more speed ( about 20%) at a small cost then the PA is a pretty good deal. > I need SOME speed up, but would I be better off building >the lucas board?? The LUCAS board is a true 68020, and it will (whenever Brad can finish) have a 32 bit memory board also (with the 32 bit mem. the speedup should be around %100). LUCAS is the cheapeast way to get a '20 ($75 for board + $300+ for parts [68881 - $150 68020 $99 {12Mhz}]). But be warned: GETTING PARTS IS HELL!!! Yes, I ordered parts for the board before Thanksgiving, currently I am waiting on the sockets and the SIP resistors, who knows when I'll actually get to assemble everything :-(. Remember with a PA (or any other comercial product) you get everything assembled, be ready for some headaches if you want to save some $$$... +----------------------------------------------------------------------------+ | Disclaimer: Me? Post That, impossible I never post anything... | | TypetoYouLater(Everyone); --> "functional Good bye".... | | Rick Golembiewski [ Pronunciation is half the Battle, spelling the other] | +----------------------------------------------------------------------------+
mp1u+@andrew.cmu.edu (Michael Portuesi) (01/27/89)
wolff@cs.purdue.EDU (Robert M. Wolff) writes: > > Speaking of 68020 boards...There is one out from CMI that sticks into > the 68000 socket and has a socket for an 881. It retails for $199. The CMI board does NOT use a 68020. It uses a 68000 running at 16 Mhz or thereabouts. > And I was wondering if anyone had heard what kind of performance it > was getting?? I need SOME speed up, but would I be better off building > the lucas board?? > The Lucas board would be faster, and if you add the Lucas 32-bit memory board that Brad Fowles is designing right now the comparison would move from "faster" to "no contest." But the Lucas board is a DIY hack, and the CMI board is a commercial product. The Lucas board will probably cost more, since a 68020 is more expensive than a high-speed 68000. The decision of which to get depends on how much speed you want, how much money you want to spend, and how hardware-capable you are. -- Michael Portuesi / Information Technology Center / Carnegie Mellon University INET: mp1u+@andrew.cmu.edu / BITNET: mp1u+@andrew UUCP: ...harvard!andrew.cmu.edu!mp1u+ "I'm very sorry, Master, but that WAS the backup system" -- Slave
anakin@gpu.utcs.toronto.edu (Anakin Research) (01/27/89)
I'm about as partial as you can get about the LUCAS Board, its my design. I wasn't aware that CMI had an 020 board out. But if they do I'd give a good look see to see what the CMI board is like. As far as I'm concerned the more '020's out there the better. LUCAS is only for the 1000 (this is a political statement) and hopefully the CMI board can be used in the other two as well. LUCAS does have its problems, but its doing some pretty fast work for some. I'd like to hear about the CMI board if anyone knows about it. Brad
billsey@agora.UUCP (Bill Seymour) (01/29/89)
From article <5894@medusa.cs.purdue.edu:, by wolff@cs.purdue.EDU (Robert M. Wolff):
:
: Speaking of 68020 boards...There is one out from CMI that sticks into
: the 68000 socket and has a socket for an 881. It retails for $199.
: And I was wondering if anyone had heard what kind of performance it
: was getting?? I need SOME speed up, but would I be better off building
: the lucas board??
Remember that our board is *not* a 68020 board. It's a 68000 based
accelerator. That's why the price is so low. You won't get as much of a speed
up with our board as you will with a 68020, but the price is right! (BTW, if
you don't mind giving up floppy disk access and serial port access, I've had
some success with using a 32 meg clock on the external clock line on the video
port to run the whole system at 8/16MHz instead of 7/14MHz. You will need a
multisync monitor to display things, but for ray tracing into RAM:, it gives
some help...) :)
:
: Thanks,
: bob
: --
: -=-=-=- Insert Standard Disclaimer Here, Please... -=-=-=-
:
: /************* MS-Dos? Me? No, You must be mistaken! *************/
--
-Bill Seymour ...tektronix!reed!percival!agora!billsey
...tektronix!sequent!blowpig!billsey
Creative Microsystems Northwest Amiga Group At Home Sometimes
(503) 684-9300 (503) 656-7393 BBS (503) 640-0842billsey@agora.UUCP (Bill Seymour) (02/02/89)
From article <1989Jan26.192300.7327@gpu.utcs.toronto.edu:, by anakin@gpu.utcs.toronto.edu (Anakin Research):
:
: I'm about as partial as you can get about the LUCAS Board, its
: my design. I wasn't aware that CMI had an 020 board out. But if they do
: I'd give a good look see to see what the CMI board is like. As far as
: I'm concerned the more '020's out there the better. LUCAS is only for
: the 1000 (this is a political statement) and hopefully the CMI board
: can be used in the other two as well. LUCAS does have its problems, but
: its doing some pretty fast work for some.
: I'd like to hear about the CMI board if anyone knows about it.
: Brad
Well, if anyone knew about a CMI 68020 board, it would be me... And
I don't know anything about it! I'm sure he was just thinking of the Processor
Accelerator, which is a 68000 speedup board. I'm more than happy to leave the
68020 wars to you guys... :) :)
--
-Bill Seymour ...tektronix!reed!percival!agora!billsey
...tektronix!sequent!blowpig!billsey
Creative Microsystems Northwest Amiga Group At Home Sometimes
(503) 684-9300 (503) 656-7393 BBS (503) 640-0842