Domain: datasheetarchive.com
Stories and comments across the archive that link to datasheetarchive.com.
Comments · 7
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Re:Not the worst that can happen
so I brought the 3000 home, snapped a shot of the ram and found it's not Sram and it's not Dram
it's called static column ram - which is as close to Sram as you can get (but not Sram, yet we called it that).Its not close to sram at all other than similarly sounding name, as I wrote in previous post it is an improved variant of page mode DRAM:
>and here a definition of "static column mode" in case you would somehow think this means SRAM: https://www.jedec.org/standard...even wiki has a section on it https://en.wikipedia.org/wiki/...
In fact if you search for 9A9Z you get all sorts of answers of what it is.
datasheet: http://datasheet.datasheetarch...
a big hints are
-a whole timing diagrams section on refresh
-multiplexed address bus
-fact 4Mbit sram chips didnt exist until 1993, and when they first showed up they were >$140 a pop!!!
-and fifth word of the datasheet reading 'dynamic' :-)This ram allows the same search and grab as Sram,
Now we are moving 2 posts back. You are confusing two separate things, type of ram and ability to recover data after reset. Those two are independent.
Both types of ram will keep its data mostly intact over a reset, and somewhat intact after total power loss depending on process size, temperature, time etc.
Difference between SRAM and DRAM is in physical construction. One uses multiple(4-8) transistor latch arrangement - you put logic level in and it stays there until powered down. The other uses _one_ transistor and capacitor and needs frequent refresh (recharging that capacitor).More transistors to build sram means more expensive, around x10 was the minimum. This is why in the nineties a 256KB sram cache for a PC motherboard cost around the same as 4MB simm. This price difference (and use of slow processors) was the reason not a single Amiga featured sram.
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Re:I just can't live without a ZIF socket.
No, and No.
The 386 DX50 DID exist. It was uncommon, and was not routinely sold. It did exist however. I know, I distinctly remember that one. (Wikipedia is simply wrong. This is one of those cases where I wish I hadn't thrown it away. It was not an OCed 33. It was a straight up DX50. I ordered it from a computer shoppers magazine.)
The NEC V33 is also a real CPU. It is a variant of the V30, with wired logic instead of microcode.
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Re:Younger coders usually think they know best..150bps backchannel on a 1200bps modem. I.e. 1200/150 so typing (uplink) would certainly be 150bps.
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Re:This won't change anything
Nice old-school method.
Here's one of my favorite chips from back in the 80s that you still might find useful:
http://www.datasheetarchive.com/datasheet-pdf/Datasheet-06/DSA00100400.html
Let's you detect dialtones, busy & ring signals.
This one:
http://www.datasheetarchive.com/datasheet-pdf/Datasheet-06/DSA00100405.htmldecodes the SIT (three tone) error signals (there are eight different ones, actually.)
http://en.wikipedia.org/wiki/Special_information_tones
Keep hacking and tell me what you end up with.
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Re:This won't change anything
Nice old-school method.
Here's one of my favorite chips from back in the 80s that you still might find useful:
http://www.datasheetarchive.com/datasheet-pdf/Datasheet-06/DSA00100400.html
Let's you detect dialtones, busy & ring signals.
This one:
http://www.datasheetarchive.com/datasheet-pdf/Datasheet-06/DSA00100405.htmldecodes the SIT (three tone) error signals (there are eight different ones, actually.)
http://en.wikipedia.org/wiki/Special_information_tones
Keep hacking and tell me what you end up with.
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Re:Interesting.
I don't believe that it is. From the cursory second reading of the paper- it's a new type of sensor.
The paper says that the sensor was a Kodak KAF-16802CE. http://www.datasheetarchive.com/KAF-16802CE-datasheet.html#datasheets is the datasheet for this chip, and it appears to be a stock Kodak CCD sensor. Nothing particularly new about it at all. The CE part implies it is a color filtered version.
The new part is the microlens array bolted on the front.
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UC5608DWPThe chips that are briefly visible in the zoom at the beginning and end of the animation are actually real and appropriate to the context.
UC5608DWP -- LOWER CAPACITANCE 18-LINE 5V SE TERMINATOR FOR SCSI AND FAST SCSI.
We all needed to know this.
You're very welcome.