Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!kuhub.cc.ukans.edu!markv From: markv@kuhub.cc.ukans.edu Newsgroups: comp.sys.amiga.hardware Subject: Re: 14 Mhz Hack Message-ID: <1991May15.103225.30756@kuhub.cc.ukans.edu> Date: 15 May 91 15:32:25 GMT References: <1991May10.104421.22314@rulway.LeidenUniv.nl> , <1991May15.005045.3401@news.iastate.edu> Organization: University of Kansas Academic Computing Services Lines: 29 >>I would also suggest using a 16mhz 68010. > I was told by a man at Motorola in the MC680x0 conference that a 16 MHz 68010 > does not exist.Since his post came from Motorola I'm assuming he is correct. Yes, the fastest 68010 available is a 12MHz part. However, the difference between 12 and 14.32 Mhz is about 15% which is right on the margin of the "safety zone" built into most tolerances. I have used a 12 MHz part at 14 successfully, as have some others. The succes ratio is about 50/50 per chip. The LC parts (ceramic case) seem to do a bit better, probably because the ceramic case has some better heat dissipation. If you can keep the chip cool, like a good size direct heat sink, your probably okay since heat is what causes the most problems (witness the "IceCube" hack for a 50MHz 386). Warning, I make no claim as to the safety of trying this, however its very unlikely to hurt the machine, just fry an innocent CPU or two. Also, if your doing some heavy interrupt use (ie: fast interrupt drive I/O for one), you can benefit greatly from the 010 if you move the Exception table into fast. -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Mark Gooderum Only... \ Good Cheer !!! Academic Computing Services /// \___________________________ University of Kansas /// /| __ _ Bix: mgooderum \\\ /// /__| |\/| | | _ /_\ makes it Bitnet: MARKV@UKANVAX \/\/ / | | | | |__| / \ possible... Internet: markv@kuhub.cc.ukans.edu ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~