....excellent condition Ithaca InterSystems DPS-1.

I exhibited two of these at VCF-East 2016. They are nice S-100 machines. But the chips get "rusty" in an odd way, the leads turn black. HEre's how I fixed mine: http://www.retrotechnology.com/restore/ith_feb16_repairs.html Herb -- Herbert R. Johnson, New Jersey in the USA http://www.retrotechnology.com OR .net