jeffg@comspec.uucp (Jeff Goebel) (05/14/91)
It's hard keeping rumours from facts. Tel me please: Can you change anything in a Commodore 68020 card to increase speed? I have heard tell of replacement chips which are faster than 14Mhz. What's the scoop? -- Jeff Goebel. Comspec Staff. I am obligated to point out that my messages are the views and opinions of myself, and not those of Comspec, or my bosses in particular. Comspec: (416) 633-5605 PCPN BBS: (416) 633-0185
billsey@agora.UUCP (Bill Seymour) (05/15/91)
In article <1991May13.201735.9720@comspec.uucp>, Jeff Goebel writes: > It's hard keeping rumours from facts. Tel me please: > > Can you change anything in a Commodore 68020 card to increase speed? > I have heard tell of replacement chips which are faster than 14Mhz. > > What's the scoop? With the 2620 card, the easy way to increase speed (easy he said?) is to swap the existing 110ns memory chips out for 80ns memory chips. That and a jumper change allows you to run a zero wait state system. It gives about a 17% improvement, according to Jez San's Speed 2.0 program. Swapping out the processor wouldn't give you much without some major changes, since the 2620 is a syncronous 14.32MHz board, changing the 68881 to a faster one and adding the crystal oscillator would work though, and in fact they have jumpers and a place on the board for the crystal. > Jeff Goebel. > Comspec Staff. I am obligated to point out that my messages are the views > and opinions of myself, and not those of Comspec, or my bosses in particular. > Comspec: (416) 633-5605 PCPN BBS: (416) 633-0185 -Bill Seymour nesbbx!billsey@agora.uucp or nesbbx!billsey@agora.rain.com ***** American People/Link Amiga Zone Hardware Specialist NES*BILL ***** Bejed, Inc. NES, Inc. NAG BBS NES BBX BBS Home Sometimes (503)281-8153 (503)246-9311 (503)656-7393 (503)640-9337 (503) 640-0842
daveh@cbmvax.commodore.com (Dave Haynie) (05/15/91)
In article <1991May13.201735.9720@comspec.uucp> jeffg@comspec.uucp (Jeff Goebel) writes: >It's hard keeping rumours from facts. Tel me please: >Can you change anything in a Commodore 68020 card to increase speed? >I have heard tell of replacement chips which are faster than 14Mhz. You can put all the faster chips in an A2620 you like. The only one that can make the system go any faster is a faster math chip (only an issue if you're doing heavy math-oriented things). The 14MHz 68881 can be replaced with a 25MHz or faster 68882 and an accompanying faster crystal module. There's no way to speed up the 68020/68851 combination. >Jeff Goebel. -- Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests" {uunet|pyramid|rutgers}!cbmvax!daveh PLINK: hazy BIX: hazy "That's me in the corner, that's me in the spotlight" -R.E.M.