gregb15@pro-charlotte.cts.com (Greg Beckham) (06/28/88)
In my last graphic chip suggestion I left out a point. That the custom
graphics chips should be able to be bought in versions that could be addressed
by a 68020 or 68030 chip at hight clock speeds. In all of the reviews I've
seen it said that the 680x0's didn't signifigantly increase total system speed
because of the inability to access the graphics co-processors at higher clock
speeds. I think this addition/revision would *HELP* the Amiga compete more
against the faster/higher priced graphic oriented Mac II series.
[G]reg[B]eckham
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INET: gregb15@pro-charlotte.cts.comdaveh@cbmvax.UUCP (Dave Haynie) (06/29/88)
in article <3157@crash.cts.com>, gregb15@pro-charlotte.cts.com (Greg Beckham) says: > > In all of the reviews I've > seen it said that the 680x0's didn't signifigantly increase total system speed > because of the inability to access the graphics co-processors at higher clock > speeds. I think this addition/revision would *HELP* the Amiga compete more > against the faster/higher priced graphic oriented Mac II series. I think you must have re-read the review of the CSA 68020 board in AmigaWorld too many times :-). First of all, the main speed limitation of the setup they reviewed was the absence of 32 bit wide memory. Which does exist for most of the 68020 boards that can be used in Amigas. With a reasonable amount of 32 bit wide memory, you can expect most integer-based operations to go up to 4 times faster on a 14.2MHz 68020 than on the based CPU. This includes going faster than a Mac II. With a much faster 68020, fast 32 bit memory makes even more difference, and it would probably make sense to add more cache memory if possible. 68020s these days are available as fast as 33MHz. Certainly a 32 bit wide path to video RAM would make the system even faster, but that's not the main limiting factor. > [G]reg[B]eckham -- Dave Haynie "The 32 Bit Guy" Commodore-Amiga "The Crew That Never Rests" {ihnp4|uunet|rutgers}!cbmvax!daveh PLINK: D-DAVE H BIX: hazy "I can't relax, 'cause I'm a Boinger!"