the juniro reaches maturity

6-10 — elektor june 1981 the junior reaches maturity As in the previous two articles on the extension card this can only be a relatively brief summary of the con- structional details required to build and fit the boards to the Junior Computer. The subject will be covered at length in the forthcoming Junior Computer Book 3 but sufficient information is presented in this article to enable readers to get to grips with the hardware now. The addition of the extension card will involve a few minor alterations to other areas of the computer. — certain modifications have to be made to the main board (some are optional); the junior reaches and wire the module. The need for the circuit in figure 2b was explained in the "Junior Cookbook= article (Elektor, April 1981, p.4-28/29). Two ports belonging to IC10 which were not used before, now come into .their own. This supplementary circuit is mounted "piggy-back" on top of the main board. There will be no problem here if IC10 is mounted in a...