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by sehugg
2559 days ago
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A weird thing about some early discrete arcade games is that they generated 3x5 pixel digits without a ROM. They used a 7448 seven-segment decoder -- you know, like those cool LCD/LED clock radios. A BCD counter drives the 7448, then it feeds into a couple of multiplexers and a handful of gates, which generates the video signal. I gotta think there's a better way, but I'm not inclined to second-guess these designers. |
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