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Comment Re: Commodore Amiga or Commodore PC? (Score 1) 456

To be more correct, the 68000 certainly could support multitasking, both cooperative and preemptive -- it just could not fully support instruction restart after certain types of exceptions ( and this could not support virtual memory ala UNIX).

I was puzzled by TechyImmigrant's comment and found the same thing. The 68000 saved enough state to handle interrupts which is needed for preemptive multitasking but not bus fault exceptions which are needed to support virtual memory like with a 68451 MMU.

I am not aware of any CPUs which support interrupts that cannot support preemptive multitasking.

I too was puzzled by how I muddled up preemption with instruction restart for paging or virtual memory. I wasn't even drunk.

Comment Re:Commodore Amiga or Commodore PC? (Score 1) 456

As usual, your shitty posting history is confirmed by yet another piece of shit post. The 68010 had nothing to do with "instruction restart". Jesus Christ.

Yes it did. It had a prefetch buffer added and retained enough state to undo an instruction when it hit a memory fault half way through executing the instruction. I have designed computers using the 68010 that took advantage of that.

Comment Re:Commodore Amiga or Commodore PC? (Score 4, Interesting) 456

>a classmate posting something questioning the pre-emptive multitasking capabilities of AmigaOS

Yes. The Amiga ran on a 68000. The 68000 didn't support instruction restart. So you couldn't properly do preemptive multitasking with it. It needed the applications to cooperate with the interruptions. So an application could undermine the preemption. The 68010 fixed this problem. There were also unix based 68000 workstations that had two 68000s, one running a clock cycle behind the other, so the state of the CPU could be rewound and the instruction restarted when necessary.

Comment Re:Social mobility was killed, but not this way (Score 1) 1032

I can't afford expensive art, but I can afford some of the art I like. I buy that. I don't expect it to make money. I expect it to look good.

I think there's a reasonable expectation that expensive art should be a lot better at the things you use art for than cheap art.

Expectation and reality don't seem to line up a whole lot in my experience.

Comment Re:In other words (Score 1) 124

longshoremen strikes

because having your latest gadget sooner than later is more important than the lives of workers

really, who cares about the sub-humans who handle your goods?

We're a customer of their services. Not an intermediary in their wage negotiations. When all imports can be blocked for weeks, it encourages people to explore local supply options, which is exactly the point.

Comment Re:In other words (Score 1) 124

I guess the real reason is that Chinese labour costs have increased during the last years. But considering the $20,000 price tag I agree.

That and importing stuff is a massive pain in the arse. Between ultra complicated and hard to find tariff rules, longshoremen strikes, highly variable shipping costs, theft of goods and the host country's efforts to put backdoors in products manufactured within its borders, it can be easier to just build it at home.

Comment Re: IVB (Score 1) 558

The sort with the plastic housing the direct the air around the chips and muffle the noise. Why doesn't everyone do that?

Because it's mostly cosmetic and actually restricts airflow. My motherboard doesn't have a single fan on it, if it was covered in shrouding it wouldn't receive much airflow from the case fans. It doesn't muffle the sound either, an actively cooled motherboard with shrouding is louder than a passively cooled motherboard without it.

There are fans that attach to openings in the airguide that suck cold air from within the box and run it over the motherboard and the hot air is then vented out through the back panel. It is pretty quiet. The video card is the loudest thing. I've done water cooling in the past, which is much quieter though and in my next gaming computer I'll probably go for water cooling again.

Comment IVB (Score 2) 558

A big box. The sort that holds the MB horizontally with the drives underneath.
A sabertooth motherboard. The sort with the plastic housing the direct the air around the chips and muffle the noise. Why doesn't everyone do that?
A 4 core top end Ivy Bridge i7, 64GB dram.
Dual 500Gig SSD mirrored. In hotplug housing.
Dual 1TB rotating mirrored, for local backup. In hotplug housing.
Some expensive Nvidia card.

Why?
#1 The CPU is the first model with my logic in it. So it's personal. Also employee discount.
#2 I wanted to play 3D games after a hiatus of a few years.
#3 Hotplug housing is awesome. You can pull em out and put em back in again.
 

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