jessenator
Well-known member
I've searched a few threads and wanted to make a place for a 'once-and-for-all' declarative thread regarding these final incarnations of the MC68040 CPU.
I've read many things and heard many testimonials, but I wanted to definitively understand what people mean.
Most of the time, this is what I see written about them:
Is this truly their behavior, globally? Were they meant to run like this, or are the takes like this simply the anecdotes from various users? I'm not looking to cast blame, I just want there to be more of an empirical reference point for these, because, you hear things and things get passed around.
And if this (above) is taken to be true, is it enough to declare CPUs that are marked such, but do not run this way as 'fakes' or 'counterfeits?' AND MORE TO THAT POINT: what is an unacceptable range of temperature operation?
I have some E42K mask versions that would probably run ~50–60C at stock speeds without a heatsink, but would be interested to know the range in the real world. Modern CPUs operate around that at load or higher, even. I've seen in the Freescale documentation something close to 101C being the upper limit, but I don't recall for certain. Obviously, we don't want to run in that range, but within an acceptable one.
Ideally, I would appreciate the insight of anyone who worked at a Motorola fab during the period, but on the other hand I'd also understand if any such person would prefer to keep quiet on the matter .
I've read many things and heard many testimonials, but I wanted to definitively understand what people mean.
Most of the time, this is what I see written about them:
Which I take to mean, "these can run without a heatsink" and also "there's little perceptible temperature differential when 'touched'"they run cool to the touch
Is this truly their behavior, globally? Were they meant to run like this, or are the takes like this simply the anecdotes from various users? I'm not looking to cast blame, I just want there to be more of an empirical reference point for these, because, you hear things and things get passed around.
And if this (above) is taken to be true, is it enough to declare CPUs that are marked such, but do not run this way as 'fakes' or 'counterfeits?' AND MORE TO THAT POINT: what is an unacceptable range of temperature operation?
I have some E42K mask versions that would probably run ~50–60C at stock speeds without a heatsink, but would be interested to know the range in the real world. Modern CPUs operate around that at load or higher, even. I've seen in the Freescale documentation something close to 101C being the upper limit, but I don't recall for certain. Obviously, we don't want to run in that range, but within an acceptable one.
Ideally, I would appreciate the insight of anyone who worked at a Motorola fab during the period, but on the other hand I'd also understand if any such person would prefer to keep quiet on the matter .
Last edited: