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Datapoint 2200 / Diablo diskinterface on Ebay...

jdreesen

Experienced Member
Joined
Jul 5, 2012
Messages
414
Location
Switzerland
A very rare item propped up on ebay : a Diablo disk controller for the Datapoint 2200 and friends. 3 separate auctions for the PCB¨s at 199 USD each is not cheap, but together they are an almost complete set. You will miss the powersupply PCB and the small rack the 4 cards go in. I have a spare for the latter... Need to draw up the schematics of my boards....

Is the seller on this list ?

pic for the complete controller :

20180226_193516.jpg

Detail of the motherboard ( not currently on ebay....) :

Disc_motherboard.jpg
 
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These boards are now with me and yielded me 2 complete sets of Datapoint 9350 Diablo disk controllers. The earlier 1K buffer variant is old enough to still use 4008 1K dynamic rams. The later 4K variant uses 2102's.
These controllers are mounted with the Diablo disk itself in a small Datapoint desk.
dp9350_open.jpgdp9350.jpgdsk_ctrl_9350_open.jpg

Front/back pics of the 4 boards can be downloaded from ftp://ftp.dreesen.ch/datapoint/dp9350.zip

The Diablo needs some care, the controller itself must be recondtioned and tested. And the 2200 itself is still awaiting repairs...
And these MRAC 42 pin connectors are not all that easy to find, besides being expensive...
 
And these MRAC 42 pin connectors are not all that easy to find, besides being expensive...

And they also come in a lot of confusing variants and options. I've obtained some MRAC 42S for my Diablos from eBay (a lot of them seem to be from scrapped avionics) and machined up a tool to release the pins a few years ago.
Unfortunately this did not work and it broke, so will make some changes and try again sometime. I have also started on an OpenSCAD model for 3D printed MRAC's to use more common PC power supply pins/sockets.
MRAC42_test_spacing_geometry.png
 
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I have one of those desks...
 

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