brian.cohen@canremote.uucp (BRIAN COHEN) (03/06/90)
Dave, it's interesting to compare '030, '020 with '386, and '286 machines, but what happens when you take the Amiga coprocessors and add them to the equation? As a system what IBM model compares to a A2000. A2500/20, and A2500/30, and just to stir things up, the A3000. I realise the operating system influences the throughput but a rough guideline would be appreciated. Regards,Brian --- * Via ProDoor 3.1R
daveh@cbmvax.commodore.com (Dave Haynie) (03/13/90)
In article <90030807522946@masnet.uucp> brian.cohen@canremote.uucp (BRIAN COHEN) writes: >Dave, it's interesting to compare '030, '020 with '386, and '286 >machines, but what happens when you take the Amiga coprocessors and add >them to the equation? As a system what IBM model compares to a A2000. I don't much about specific IBM models, but in general you can draw the following correspondences: A2000 <--> 8MHz '286 machine A2500/20 <--> 16MHz '386 + '387 A2500/30 <--> 25MHz '386 + '387 A3000 <--> Better 25MHz '386 + '387 That's the best correspondence I can think up. Lots has to do with what kind of work you're doing. An 8MHz '286 might do some things faster than the A2000, the A2000 will do some things faster than the '286. All Amiga machines here have faster hard disk interfaces than the typical PC machine in the same class; you'd really need an EISA or Microchannel external bus or some custom, off the expansion bus controller on any PC to go much faster than the basic A2000 DMA controllers will push you. Many of the cheap PCs have a VGA display which looks nicer than an unexpanded Amiga display, but only the very top end VGAs have decent speed. The '386 is a bit faster than an '020 and a bit slower than an '030 at the same clock rate for most things, given equivalent memory designs. But some higher end '386s (most 25MHz and 33MHz machines) have external cache; that's not as fast as the '030 internal cache by far, but you get much, much more of it. And of course, the software issues are big -- Amiga's don't run anything like MS-DOS, and PClones don't run anything like AmigaOS. That gives the PClones the speed advantage of "I own the machine", and the Amigas the advantage of "I get real 32 bit instructions and an extremely efficient multitasking environment". The best head-head test of any of these machines would probably be having them all run the same things under UNIX System V Release 4.0, which will eventually run on all A2500+ Amigas and most '386 machines. >Regards,Brian -- Dave Haynie Commodore-Amiga (Systems Engineering) "The Crew That Never Rests" {uunet|pyramid|rutgers}!cbmvax!daveh PLINK: hazy BIX: hazy Too much of everything is just enough
kosma%stc-sun@stc.lockheed.com (Monty Kosma) (03/16/90)
From: Dave Haynie <daveh@cbmvax.commodore.com> Date: 12 Mar 90 22:25:27 GMT In article <90030807522946@masnet.uucp> brian.cohen@canremote.uucp (BRIAN COHEN) writes: >Dave, it's interesting to compare '030, '020 with '386, and '286 >machines, but what happens when you take the Amiga coprocessors and add >them to the equation? As a system what IBM model compares to a A2000. I don't much about specific IBM models, but in general you can draw the following correspondences: A2000 <--> 8MHz '286 machine A2500/20 <--> 16MHz '386 + '387 A2500/30 <--> 25MHz '386 + '387 A3000 <--> Better 25MHz '386 + '387 ^^^^^ Do you know something we don't know, Dave??? :-) -- Dave Haynie Commodore-Amiga (Systems Engineering) "The Crew That Never Rests" {uunet|pyramid|rutgers}!cbmvax!daveh PLINK: hazy BIX: hazy Too much of everything is just enough