francis@CIS.OHIO-STATE.EDU (RD Francis) (05/15/91)
Just decided to get a bit curious, and ask if anyone else has seen this sort of thing. About a year ago (hey, we're a university, what can I say), we decided to upgrade our remaining Mac Pluses to 2.5 megs. We got the money on this year's budget, and bought some chips (now, I'm just a software guy; the hardware guys handled this; again, I'm just curious). When the hardware guys tried to install the memory, most of our Macs wouldn't accept it. They finally managed to work around the problem, but it takes four hours worth of work to get the upgrade to take, and even then the macs may be prone to fail (they've only done a few, and one died with a problem related to the upgrade). My first instinct was to suggest that the memory was messed up, and we should get it somewhere else. Our hardware guys have assured me that the memory works fine in other macs we occasionally have access to (from our department's computer labs), just not in *ours*; in addition, known good memory swapped into these machines doesn't work either. Note: most, if not all, of our machines were purchased in 1985-1987, I think. Now, has *anyone* else seen these sorts of problems? *Something*'s wrong somewhere, and it'd be nice to actually know what it is.
steveh@tasman.cc.utas.edu.au (Steven Howell) (05/21/91)
If you are saying, that you upgraded a standard mac plus, to a standard 2.5 megs, which involved the standard installation and standard resistor cut, then the memory is obviously Very Bad. What you are encountering is most likely a rining effect. We had a couple like this, and they had left the campus back to their supplier within hours we found out they they were bad. To upgrade, you simply pull appart install, cut resistor and put back together. It will work, and there is no diffrence in performance when powered up, except for a slightly longer delay, and that the system (Under the black apple, about finder) reports a total of 2.5meg. Anyway, i feel i should know. I have upgraded inxs of 500megs see what happens ay' steve h