On 13.11.22 21:14, Steve Lewis via cctalk wrote:
Thanks Jos, I hadn't realized how similar the DP1100 is.
This brochure has a great image of the font right on the front page (80x12
text):
http://www.bitsavers.org/pdf/datapoint/1100/Dataform_1100_Brochure_1974.pdf
Maybe something similar can be done for the old DP's? I understand for
authentic/historical perspective all original components is prefered, but
using a substitute PSU is reasonable for checking out the rest of the
system.
The DP2200 needs secondaries of 450V, 120V,40V, 25V, -25V, 12V, -12V 5V and
-5V. Yep, can be done, but.....
What an amazing system those Datapoints were, for their time. The
chicken-farm story in the DP2200 book is really fun - these farmers being
savvy enough to code up what they needed, and the systems compact enough to
fit in the farms and using modems even to sync up data (pre-1975).
They were, and are, indeed nice little systems...really need to get mine up
again, also because I have a Diablo disk system for it. Must be extremely rare..
But, in extracting the data on those TTLs, it seems like a modern replica
of a DP2200 would be possible.
Sure, I even have the complete DP2200 MB in Kicad, see
http://www.bitsavers.org/pdf/datapoint/2200/jdreesen_shematics/DP2200_mb.pdf
if anyone wants to go ahead I will gladly share my Kicad project ! Mind you,
the diddlescan is a problem as that requires a CRT yoke with 3 windings....
Jos
