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M900, 4004


Veteran Member
Jul 26, 2009
Boulder , Colorado USA
Hi All;
I today got out my old Pro-Log M900 Eprom Programmer, which has a 4004 CPU.. Right now there isn't any thing on the Led/disply, except for when it is first turned on.. I see an "F" in each Display, before it goes to nothing.. Looking at the 4004 with my scope, it looks like I have activity on most all of the lines.. So I think it may be functionally ok, I just found information on the 4008 and 4009, and will look at then and on the 1702 Eproms, after this posting.. What I am wondering is What would I be looking for, to asert the this may be running, and not a Dead chip set..