Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!uunet!cbmvax!daveh From: daveh@cbmvax.commodore.com (Dave Haynie) Newsgroups: comp.sys.amiga.hardware Subject: Re: Crippled A3000 Message-ID: <22175@cbmvax.commodore.com> Date: 5 Jun 91 16:35:15 GMT References: <22123@cbmvax.commodore.com> <193f5e0a.ARN1469@pilhuhn.ka.sub.org> Reply-To: daveh@cbmvax.commodore.com (Dave Haynie) Organization: Commodore, West Chester, PA Lines: 22 In article <193f5e0a.ARN1469@pilhuhn.ka.sub.org> hwr@pilhuhn.ka.sub.org (Heiko W.Rupp) writes: >In article <22123@cbmvax.commodore.com>, Dave Haynie writes: >> So yes, it's possible for a 25MHz add-in to run the entire system at >> 25MHz. With such an add-in installed, there is no difference between an A3000 >> that came at 25MHz and the upgraded 16MHz system. >Would a 50 Mhz 68030/882 Card (or even a 040 Card with a higher speed than >25 Mhz) in the coprocessor slot also run or would it need more bus bandwith than >available on the A3000 bus ? Just like with the A2000, an A3000 coprocessor device can run with any clock. However, you can only slave the A3000 itself to either 16MHz or 25MHz. So if you plug in a 50MHz 68030 board, you don't run the A3000 at 50MHz. The 3000's memory is less than optimal to a 50MHz processor. Most likely, any such fast '030 board would have lots of external cache. -- Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests" {uunet|pyramid|rutgers}!cbmvax!daveh PLINK: hazy BIX: hazy "This is my mistake. Let me make it good." -R.E.M.