don@vax1.acs.udel.EDU (Donald R Lloyd) (03/28/90)
I've heard rumors about a text file with directions to build a
board to run a 14 MHz 68k in an Amiga (a la Processor Accelerator).
Has anybody seen this thing? '030 boards at present are way out of my
price range, but I'd like something a little faster than the 7.14 '010
in my 2000 right now. (Let me rephrase the above statement... '030 boards,
at present, are even more beyond my price range than '020 boards and processor
accelerators :-( ).
If anybody has seen this, could you give me any information you have on it?
Better yet, if it exists, it would be nice to have a copy of it show up in my
mailbox one day when I log in.... (but not thousands upon thousands of copies..)
Thanks,
Don
PS... Any donations toward correcting the above-mentioned monetary situation
will be graciously accepted :-)
--
Gibberish .sig for sale or lease.
is spoken Contact don@vax1.acs.udel.edu for more information.
here. DISCLAIMER: It's all YOUR fault.bscott@pikes.Colorado.EDU (Ben M Scott) (03/28/90)
I have this hack; got it from a local board someplace. It consists of brief instructions and an IFF pic of a diagram. Basically it involves installing a 16Mhz 68000 with pin 15 (clock) bent out, and soldered to a line which is connected to a certain pin on the Agnus through a flipflop which divides the 28mhz clock freq by two; so basically you have a 14Mhz clock going into the 68000. I do not know why this would work, but according to the file it does. The flipflop shouldn't cost much at all, less than $1 probably, but you have to be careful soldering into the Agnus socket! It also recommends a toggle switch with a line to a source of the 'normal' 7Mhz clock for compatibility (apparently on one machine the floppy read/write didn't work so good in 14Mhz mode). I'd like some input from some knowledgable person on the net as to whether this would work, and WHY. The author reports a Kramden SI of about 1.7 with this mod. Also, where can I get a 16 Mhz 68010 chip, and would this work as well? . <<<<Infinite K>>>> -- _______________________________________________________________________________ | | | Someday, I'm going to make up a clever .sig file like everyone else has... | |_____________________________________________________________________________|
po87553@tut.fi (Ojala Pasi Juhani) (03/28/90)
Yes, you are right, it's in fact very simply task to add some MHzs to Amiga. Just get a faster 68000 and change the frequezor. (I don't know if it's been written this way, anyway it's a little box which gives pulses for Agnus and 68000. (I guess you know what I mean now)). The only problem is that the screen and agnus wouldn't like that fast speed so... I've been thinking changing prosessor and frequezor but these problems have always come against me! 8) SO.. (btw, I've an A500). I've already made some arrgements for building Tower-style Amiga (The final version will, of course, be called A1500 Inter cooler system plus (or something like that). I need a bigger case because I've too much junk (hd without case and 2 powersuppliers, extra drive and modem) on my desk and now I'm just about buying some 68020-card... any 68020/030(/040?????? 8) )-turbo-card would solve all speed-problems.. but of course there is a little problem too: the prise.. Juha Tuominen, Sysop of The Amiga Project