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PDQ II Co-processor accelerator card for Apple II PLUS/E

Submitted by rocketscientists on March 3, 2009 - 3:38pm. Apple II

Hi,

I have an interesting piece of hardware for my Apple II PLUS. It is the PDQ II by ETC. This is a two slot boardset that contain 256K RAMDISK (Upgradeable to 1 Meg) and a 68000 10Mhz co-processor.

However, over the years (1986) I've managed to lose the documentation on this product. Anyone here has one of these with documentation? Schematics etc? It would be helpful if I could get my hands on them to refresh myself with this and how to upgrade to the 1 Meg size.

Thanks
-RocketScientists

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littlejohn's picture

Pics Please

Submitted by littlejohn on March 4, 2009 - 12:51am.

Would love to see pics of these 2 cards.

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Mr. 8Bit

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I'd be happy too, but I am ha

Submitted by rocketscientists on March 5, 2009 - 3:25pm.

I'd be happy too, but I am having trouble with my keyboard that is soaking my time repairing it. There appears to be another problem with my apple which it freezes up when I first turn it on and then let it warm up (3-minutes) then power cycle it it works.... I know what is wron wit that issue. But the keyboard thing is just a nasty pandora's box once opened! See my recent post asking for help/schematic request and debugging.

When things are up and running smoothly, I will get the pictures.
-Bryon

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Posted the image of the PDQ II Accelerator card(s)

Submitted by rocketscientists on June 7, 2009 - 10:26pm.

Hi,

I finally got around to taking a picture of the accelerator co-processor card.. The PDQ II

It's the MC68000 10 Mhz processor. Bus management and memory access control on one card. The other is the 256KB RAM DISK/co-processor memory. It's upgradeable to 1 MByte using 256K bit DRAM chips.

Have fun
-RocketScientists

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littlejohn's picture

Thanks for the Pic...

Submitted by littlejohn on June 7, 2009 - 11:13pm.

I get that the 2 cables attach the boards together, but then where does the smaller cable go to from there?

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Mr. 8Bit

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Since the cards consume much

Submitted by rocketscientists on June 7, 2009 - 11:21pm.

Since the cards consume much more than the 100mA 5V power, the smaller cable 3rd connection goes to an external 5V power supply hidden in the external fan, also part of the product. The cards get quite warm too. I fixed it a while back only to leave it on all night and two RAM chips + the microprocessor died. I am in the process of getting new parts.

-RocketScientists

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