View Full Version : M900, 4004

November 14th, 2012, 11:30 AM
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..