Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!genrad!decvax!ittatc!dcdwest!sdcsvax!ucbvax!jade!ucbopal!mwm From: mwm@ucbopal.berkeley.edu (Mike Meyer) Newsgroups: net.micro.amiga Subject: Gotcha in MC68010 upgrade Message-ID: <902@jade.BERKELEY.EDU> Date: Mon, 23-Jun-86 10:17:36 EDT Article-I.D.: jade.902 Posted: Mon Jun 23 10:17:36 1986 Date-Received: Wed, 25-Jun-86 07:32:55 EDT Sender: usenet@jade.BERKELEY.EDU Reply-To: mwm@ucbopal.BERKELEY.EDU (Mike Meyer) Organization: Missionaria Phonibalonica Lines: 26 I just made the MC68010 upgrade, following Thad Floryan's instructions to be found on Fish disk #18. There was only one problem, of the "I should have know better" sort. Since it can bite even the most experienced hardware tech (which doesn't describe me) as well as the hardware naive (which is closer to what I am), I thought I'd describe it to the net, in the hopes that others would avoid it. If you understand which directions chips go on a board, you can skip this paragraph. If not, then dig out a chip - any chip. At one end should be a notch in the chip. This marks the end where pin 1 is. When replacing a chip, you should note which end the notch is on, and put the replacement in with the same orientation. Almost universally, all chips on a board have the same orientation. On the Amiga motherboard, the 68K CPU is upside down compared to the rest of the chips. I made the blunder of pulling the chip before checking, then putting the 68010 in upside down (after all, that's the orientation everything else on the board had....). Reinserted the 68000 the same way, and got rather upset when it didn't work. After some gnashing of teeth, I decided to see if someone had been scumbag enough to put the 68K on the board upside down. Sure enough, it works. I'm typing this on a 68010-based Amiga. Happy hacking,