Probably anything that didn't follow Apple's programming guidelines and made undocumented Toolbox calls and the like.

This may sound like a dumb question, but are there any classic Mac games that will run a 68000 Mac but not on the 68030 SE/30? I know the Atari Falcon (a 68030 machine) had all ki…

I checked the fit of all the socketed items and they're all as tight as they can be. The RAM looks brand new and is also in tightly. I guess it's the capacitors then. I have an …

Ditto Tom Lee's excellent advice. Moreover, it could be iffy fluid-filled capacitors as well. Heat does influence them.

The Plus should handle those ambient conditions ok. Perhaps you have poor connections that are particularly sensitive to changes in temperature. Common culprits would be RAM, as we…

.. folks seem to run at 20 - 25 MHz even after they've swapped in an 88916. There might be problems if the 88916 gets hot or otherwise loses margin, I imagine. Click to expand…

.. folks seem to run at 20 - 25 MHz even after they've swapped in an 88916. There might be problems if the 88916 gets hot or otherwise loses margin, I imagine. Click to expand…

.. folks seem to run at 20 - 25 MHz even after they've swapped in an 88916. There might be problems if the 88916 gets hot or otherwise loses margin, I imagine. Click to expand…

1. MC88920 has been designed specifically for the 20 and 25Mhz 68040 microprocessors. Click to expand... Yes, I noticed that when I reviewed the datasheets last week. However…

I've seen sites that say the icons are free for non-profit (i.e. personal) desktop use, but not allowing www use. Are we sure no such distinction is made here? Click to expand.…

Well, according to widget : widget's Terms and Conditions page, their icons are all available under Creative Commons noncommercial and/or commercial licenses. Icons with the noncom…

The most primitive stand alone Apple LCD was the blue & white 15" Studio Display at 1024x768. It is a multi-sync display so it will display 640x480. The earliest LCDs from …

I posed this question on the "bringing back to life" thread but did not get any response most likely because I slipped it in as an afterthought. Although it works perfectly, I wo…

I think I've figured it out, and it has nothing to do with Stuffit after all. The system is simply overheating. I turned it on yesterday evening and everything was working just f…

OK, if you're using 20 MHz oscillator in your mod, would you mind telling me where that 40 MHz signal for the processor comes from? :-D Click to expand... Well, apparently eac…

Well, according to widget : widget's Terms and Conditions page, their icons are all available under Creative Commons noncommercial and/or commercial licenses. Icons with the noncom…

The following is taken from MacWorld's Mac Secrets, 5th Edition by David Pogue & Joseph Schorr: In reality, the Mac’s error codes aren’t nearly that enlightening. Fo…

"johnklos", _You can not make it work without the help of PLL chip in any way_!In all Quadras + IIVx this PLL works as Frequency doubler. That means, you put 12.5MHz in and out co…

"johnklos", _You can not make it work without the help of PLL chip in any way_! (PLL stands for Phase Locked Loop, check Google or Wiki how it works, in caseYou don't know.)In all…

Hi guys, Although we often mention Marc Schrier's page, we all should give a credit regarding this mod to that person from Japan, namely Hiromasa Yamaoka who was first to do suc…

Something else just occurred to me on the overheating possibility. Could it be the HD that's overheating and not the system? Tempest

The games will immediately crash again if I open them. But like I said it's not all the games, just certain ones. I'll crack 'er open and see if there's something loose inside or…

Ok yet another wrinkle. I had the Mac turned off for an hour or so while I did something else, came back, and now everything works. Shufflepuck, Fools Errand, Gunshy, they all wo…

Ok yet another wrinkle. I had the Mac turned off for an hour or so while I did something else, came back, and now everything works. Shufflepuck, Fools Errand, Gunshy, they all wo…

Hmm... Just got an Illegal Instruction error in the control panel again. Could just the presence of a bad program in a folder cause the Mac to go wonky or does it have to be 'inst…