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Why the Z-80's Data Pins Are Scrambled

ChrisMaple Re:Future does not bode well (165 comments)

Modern Intel chips have documentation that is not available outside Intel. Consider things like registers for testing in the factory, circuits for disabling defective cores or defective cache memories, etc..

4 days ago
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Why the Z-80's Data Pins Are Scrambled

ChrisMaple Re:BASIC vs. Z80 assembly language (165 comments)

Also in the WordStar executable was the ASCII text: "Nosy, aren't you?", a message to those disassembling the program.

4 days ago
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Why the Z-80's Data Pins Are Scrambled

ChrisMaple Re:Why is it necessary to reverse engineer this? (165 comments)

While we're at it, all undergraduates should only be allowed to submit programs on punch cards, and have to wait 3 days to see if their program compiled and ran. And walk to class barefoot in the snow.

4 days ago
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Why the Z-80's Data Pins Are Scrambled

ChrisMaple Re:Why didn't they just ask Federico Faggin? (165 comments)

With an optical microscope you could actually look at a Z80 die, see the transistors (all 8500 of them) and conductors, and write up a schematic of the chip. Considered a trade secret or not, the Z80 is known and completely defined. Nonetheless, it's possible that you're right and contracts may prevent him from talking about stuff that's no longer secret.

4 days ago
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Why the Z-80's Data Pins Are Scrambled

ChrisMaple Re:C=128 (165 comments)

Z80:
8 bit register adds, 4 clocks (equivalent to 2 6502 clocks)
16 bit register adds, 11 clocks, with carry, 15 clocks.
The slowest instructions (23 clocks) are obscure instructions like swap register with memory, or indirect indexed addressing. These were limited by the number of memory accesses needed.

I've built hardware and done a lot of assembly level programming on both the Z80 and 6502. There is simply no substantial speed difference between them for the level of technology available in any particular year.

4 days ago
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Why the Z-80's Data Pins Are Scrambled

ChrisMaple Re:C=128 (165 comments)

Most Z80 code was written to be compatible with the 8080. As a result, the second register set wasn't used. Floating point math using the second register set for temporary variables made possible a substantial speedup.

If the 6502 and Z80 waveforms for various instructions are examined, it quickly becomes apparent that the Z80 effectively divided its clock by 2 before using it. This is why, for the technology available in any particular year, they had comparable performance but the Z80 used twice as many clock cycles.

The 6502 was a tremendously clever design for making effective use of a small number of transistors. The Z80, striving to be a superset of the 8080, was also a clever and powerful design for its time.

4 days ago
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Irish Girls Win Google Science Fair With Astonishing Crop Yield Breakthrough

ChrisMaple Re:Aaaah... shit... There's more. (308 comments)

An increase of germination speed by 50% is a decrease in germination time by 33%. In your effort to denigrate their efforts and results, you display not only a sour attitude but poor math skills.

about a week ago
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Irish Girls Win Google Science Fair With Astonishing Crop Yield Breakthrough

ChrisMaple Re:TO THE ASS HOLE EDITORS: (308 comments)

Although the names would be nice, even if they were put first they would soon be forgotten. I mean no denigration of the girls involved, but for an article like this the primary interest is the technology, followed by the nation and gender of the inventors. Those are the things that will be remembered, the names are just noise for the general reader.

What's more important: the cotton gin or the name Eli Whitney?

about a week ago
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Irish Girls Win Google Science Fair With Astonishing Crop Yield Breakthrough

ChrisMaple Re:Population issue? (308 comments)

What do you see as the insurmountable barrier to global prosperity?

about a week ago
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Irish Girls Win Google Science Fair With Astonishing Crop Yield Breakthrough

ChrisMaple Re:Nibbling at the problem (308 comments)

"Too many people" based on what standard? Causing what problem -- food shortages?

"Not enough fresh water". Water for direct human consumption is dwarfed by water used for agriculture, also by water used by industry.

These things are interrelated. Trying to configure them as separate problems is foolish and futile.

about a week ago
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Irish Girls Win Google Science Fair With Astonishing Crop Yield Breakthrough

ChrisMaple Re:The only consequence of this is more people (308 comments)

The explosive population growth in today's world is in Asia (China and India), and in the future it will be Africa, according to the WIRED article you cite. Think, and you'll see that this supports ceoyoyo's assertion. China and India are both working hard to educate their populations (limited by the deep corruption of their political systems.) I see no such hope for most of Africa.

The anomaly here is South America; why is the population not growing there also?

about a week ago
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Irish Girls Win Google Science Fair With Astonishing Crop Yield Breakthrough

ChrisMaple Re:Frankenfood (308 comments)

"transferring genes between species that could never procreate together isn't even remotely like evolution." -- never heard of viral DNA insertion in nature, have you?

about a week ago
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Irish Girls Win Google Science Fair With Astonishing Crop Yield Breakthrough

ChrisMaple Re:Terrific counter to Monsanto's herbicide messag (308 comments)

There are a great number of plants that produce no value for humans or that make significant problems when intermixed with food plants. Consider milk thistle or poison ivy or hundreds of other thorny or poisonous plants growing alongside strawberries, which grow close to the ground and must be hand picked.

about a week ago
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Irish Girls Win Google Science Fair With Astonishing Crop Yield Breakthrough

ChrisMaple Re:The kind of science fair my school used to have (308 comments)

Your science fiction imagination is sadly inadequate. Also on the horizon are the creation of new humans without the use of the bodies of either men or women, the creation non-human intelligent beings, and the creation of intelligent beings not based on life-as-we-know-it.

Why do you write "Fuck you", then write "can't wait till we figure out how to get pregnant without men" which indicates that you don't want him to fuck?

By the way, the word missing from your vocabulary is misogynist.

about a week ago
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Irish Girls Win Google Science Fair With Astonishing Crop Yield Breakthrough

ChrisMaple Re:Irish & Potatoes (308 comments)

From the article you cited,

The proximate cause of famine was a potato disease commonly known as potato blight

So, bad power politics combined with a disease striking a monoculture crop.

about a week ago
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Irish Girls Win Google Science Fair With Astonishing Crop Yield Breakthrough

ChrisMaple Re:it is a contraceptive problem (308 comments)

Fucking makes problems better.

Problems like syphilis, gonorrhea, herpes, HPV, chlamydia, "crabs", scabies, hepatitis A and B, HIV, trichomoniasis, amebiasis, giardiasis, cryptosporidiosis, shigellosis, candidiasis, MCV, ebola and Marburg virus.

about a week ago
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Irish Girls Win Google Science Fair With Astonishing Crop Yield Breakthrough

ChrisMaple Re:The Global Food Crisis is not a science problem (308 comments)

Hungry is a sensation that does not equal undernourished, malnourished, or starving. Stop using "hungry" when referring to the effects of inadequate food supplies. It makes you seem even stupider.

about a week ago
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Irish Girls Win Google Science Fair With Astonishing Crop Yield Breakthrough

ChrisMaple Re:This is huge (308 comments)

What the hell is wrong with "economic and social inequality"? I can understand complaining about increased poverty, but complaining about inequality is a character flaw known as jealousy. Honestly acquired wealth is something properly to strive for, it indicates that the wealthy man has produced great value for others and traded that for wealth.

about a week ago
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Trouble In Branson-Land, As Would-Be Space Tourists Get Antsy Over Delays

ChrisMaple Re:Imagine the laff ex-PanAm execs are having... (77 comments)

I don't think Pan Am execs do much laughing, as Pan Am ceased to exist in 1991. Even the re-incarnations are gone.

about two weeks ago
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California Declares Carpooling Via Ride-Share Services Illegal

ChrisMaple Re:Your stupidity is hurting me. (288 comments)

You "fuck off from the internet until you at least learn what a law" should be.

about three weeks ago

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