Parallax Propeller

Gives a whole new meaning to the phrase "new-fangled".

-a

Reply to
Anders.Montonen
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This would make more sense if I could spell - normally I rely on Thunderbird's spell checker, but of course that doesn't help here! I meant to write "fankle" rather than "fangle", and I don't think the terms are related.

Reply to
David Brown

More like splitting the work load between two processors. I did timing analysis of this (back of the envelope type stuff) for the GA144 and it would be pretty simple with 100's of MIPs per CPU. I wouldn't think it would be that hard with any processor running at reasonable clock rates. Not sure why they need two CPUs. It all depends on the pixel clock rate. For a terminal (what you seem to be describing) the pixel rate should be fairly low, 50-80 MHz. That gives a character rate of 10 MHz max, so I guess that could tax a 100 MIPS processor.

I don't know what the architecture of this design is. Ideally there would be no need to lock the two processors.

I have no image of how or why you would want to use *two* video engines, although two could be used with one for the char data and one for the cursor overlay. I also don't know anything about these "video engines". If they are indeed video engines, they should be doing all the addressing and fetching from memory. One way a terminal saves memory bandwidth is by not fetching the same chars again for each line. In an old implementation I remember seeing they used a shift register to recycle the same char data for each scan line.

I'm happy to discuss this with you.

Rick

Reply to
rickman

Fankle was our "Word of the week" here in the office just last week. Every week a word is chosen, and it's printed out on A3 and put up on the wall. It is every engineers moral obligation to use that word as many times as he can in every conversation he engages in. It's hilarious. Makes client meetings so much more entertaining.

Reply to
Mark Wills

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Next week's word: stramash.

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Reply to
Alex McDonald

hat

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mash

Fit like, min?

Its nae my shot at word of the week next week, but see when it's my shot, Stramash it'll be. Ken?

Reply to
Mark Wills

Depends on your work-load, and just how much power...

The Prop is RAM loaded, so avoids the FLASH cost of many cores, and the data shows ~3.5uA @ 3v3 static, but being RAM based it can Vcc scale below that. (but it does have a boot-energy, which could be another issue..)

That is likely too high for most "scavenge power", but it also climbs slowly, so it can Poll a pin at 60KHz and ~10uA.

Some experimental numbers are found by google here

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Reply to
j.m.granville

shows ~3.5uA @ 3v3 static, but being RAM based it can Vcc scale below that.

slowly, so it can Poll a pin at 60KHz and ~10uA.

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That's very interesting, thanks.

--

Rick
Reply to
rickman

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