Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!rutgers!sunybcs!ugkamins From: ugkamins@sunybcs.uucp (John Kaminski) Newsgroups: comp.sys.tandy Subject: Re: Tandy RAM upgrade Keywords: TANDY RAM UPGRADE CHIPS Message-ID: <5585@cs.Buffalo.EDU> Date: 30 Apr 89 02:50:22 GMT References: <485@dekalb.UUCP> Sender: nobody@cs.Buffalo.EDU Reply-To: ugkamins@sunybcs.UUCP (John Kaminski) Organization: SUNY/Buffalo Computer Science Lines: 37 In article <485@dekalb.UUCP> greg@dekalb.UUCP (Greg Philmon) writes: =>A friend wants me to upgrade his Tandy 1000 (SL?) from 384 K to 640 K. Fine. =>All I need is a bank of 41256-15, right? => =>Now I'm not so sure. Knowing a little of Tandy's reputation for (non) =>compatibles, I decided to give them a call. Here's what I learned, more =>or less in order: => =>1) No, you can't use 256 K chips - you need 128 K chips. Well, I had never => heard of that, so called my chip supplier. Yup - they exist. So I'll => go ahead and get them. => =>2) Called another RS Compter Center. Nope. You don't use 128 K chips - => you need two banks of 64x4 chips (4464) Huh? I was under the impression => that this was used only in video cards. Plus, two banks of these would => be 512 K - I only need half that. => =>3) Yet another call to Tandy - this time to their (not toll-free) => "Hot-line". Yup - I need two banks of 4464 chips. "That'd be eight => chips, total." Okay, fine. No parity and some kinda screwed up => RAM setup. But I can still do it for about 1/2 of tandy's price. => =>Is some (any) of the above on track? I haven't had a chance to actually =>open his machine and look, but really doubt that it uses 64x4 chips for =>the main memory. => =>I'd appreciate any help you can give. =>-- => --------------------------------------------------------- => | Greg Philmon ...gatech!dekalb!greg CIS: 72261,1724 | => --------------------------------------------------------- Yeah.........? So what's so wrong with using 2 chips for 64K of memory? You have 1 chip for the upper nybble and 1 chip for the lower nybble. Don't worry, be happy that it will work. There's really no problem there, it's just a little different. I'd also like to see the sockets use one bit wide chips, but they aren't. Oh well.....