Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!ub!ubvmsd.cc.buffalo.edu!v104nmym From: v104nmym@ubvmsd.cc.buffalo.edu (Sherman T Chan) Newsgroups: comp.sys.atari.8bit Subject: Re: 64k mod for 600XL Message-ID: <72272@eerie.acsu.Buffalo.EDU> Date: 22 Apr 91 13:14:45 GMT References: <71574@eerie.acsu.Buffalo.EDU> <48510005@hpcupt3.cup.hp.com> Sender: news@acsu.Buffalo.EDU Reply-To: v104nmym@ubvmsd.cc.buffalo.edu Distribution: usa Organization: University at Buffalo Lines: 11 Nntp-Posting-Host: ubvmsd.cc.buffalo.edu News-Software: VAX/VMS VNEWS 1.3-4.5 In article <48510005@hpcupt3.cup.hp.com>, ken@hpcupt3.cup.hp.com (Kenneth M. Sumrall) writes... >I designed my own 64K mod for the 600XL back in 1987. It requires >two 64Kx4 ram chips, and three jumper wires. Here it is. > > [instructions for mod deleted] Thanks for the tips, but I've got one problem...how do i know which pin is which? That's the reason why I put off on doing it years ago, and then I just let it sit for so long that I lost it. So could you mail me, or post to the net on how to figure out what pins are what? Thanks, Sherm