https://www.ardent-tool.com/8580/Planar_Memory.html
Based on photos from David. Additional card variants, new outlines,
parts lists...
Why some of the cards have 4 different IC types and why are they
organized in strange patterns? Dunno, probulation needed.
And there were many other changes as well:
https://www.ardent-tool.com/other/Changelog.html#Changelog
About a year ago, there was a third party 72 pin SIMM to Model 80 planar memory connector [adapter]? I didn't buy it.
It was over in Germany, IIRC
"From Peter:
I once... [tried] to build a "Model 80 to 72-pin SIMM" converter - an attempt that failed so far for various reasons (lack of time mostly)."
On 8/28/2021 16:28, Tomas Slavotinek wrote:
https://www.ardent-tool.com/8580/Planar_Memory.html
Based on photos from David. Additional card variants, new outlines,
parts lists...
Why some of the cards have 4 different IC types and why are they
organized in strange patterns? Dunno, probulation needed.
And there were many other changes as well:
https://www.ardent-tool.com/other/Changelog.html#Changelog
Do you have the auction (or whatever) saved? Or at least the photos?
On 29.8.2021 14:06, Louis Ohland wrote:
About a year ago, there was a third party 72 pin SIMM to Model 80 planar
memory connector [adapter]? I didn't buy it.
It was over in Germany, IIRC
"From Peter:
I once... [tried] to build a "Model 80 to 72-pin SIMM" converter - an >> attempt that failed so far for various reasons (lack of time mostly)."
On 8/28/2021 16:28, Tomas Slavotinek wrote:
https://www.ardent-tool.com/8580/Planar_Memory.html
Based on photos from David. Additional card variants, new outlines,
parts lists...
Why some of the cards have 4 different IC types and why are they
organized in strange patterns? Dunno, probulation needed.
And there were many other changes as well:
https://www.ardent-tool.com/other/Changelog.html#Changelog
Panduit 130-096-553
Performance Level 3
https://www.mouser.com/Connectors/Backplane-Connectors/DIN-41612-Connectors/_/N-axj5j?P=1ysmvawZ1yzv6sa
DIN 41612 Type R is the correct name, I think...
Active part, looks like all mounting styles available...
On the 1 MB 15F6820 card we have 12 chips total, 4 chip types, chips of
the same type organized in columns by 3. No clue about the "topology".
The 1 MB 15F6773 card has 18 chips total, 4 chip types (different than above), most of the chips are organized in strange "<" and ">" patterns. There are eight 89X9809 and eight 89X9831 - either all these are 512Kbit DRAMs or half of them are 1Mbit DRAMs and the other half some sort of driver. And a similar thing applies to the two remaining special
snowflakes - 89X9822 and 89X9821. Either both of them are parity DRAMs (lower density in this case), or one is a DRAM and the other a driver.
I'm more inclined towards the DRAM/driver hypothesis, since that would
at least explain the different P/Ns. But it's hard to tell without some painful probulation...
2 MB 92F0664 - no clue (uses the same chips as the 15F6820 card).
2 MB 15F6822 - 18 chips of the same type (89X8922), probably 1Mbit
DRAMs, 16 of which are used for data and the last two as parity chips.
4 MB IBM card - 36 chips of the same type (23F7261), same idea as the
card above.
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