high resolution colour graphics card (part 4)

After the preliminary and theoretical con- siderations of the past three months, this fourth article in the series deals with the construction of the main printed-circuit board. The board is Euroformat (100 x 160 mm), double-plated, and has through-plated holes: clearly not a card for home production. It is not absolutely necessary to have read through the three previous articles, but it does help. It should be noted, however, that the circuit diagram was published in Part 3 elektor electronics december 1985 high-resolution colour graphics card - 4 (November issue), and this, of course, is essential knowledge. The construction of the card is not all that difficult, particularly since there are no adjustments or cali- bration. None the less, a beginner in this type of work will almost certainly experience difficulties if it comes to fault- finding. A really good soldering iron is required, preferably with a temperature- controlled tip, which should not be heavier than indicated in ...