AWJ |
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Reged: 03/08/05
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Posts: 936
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Loc: Ottawa, Ontario
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Re: Stern Electronics 'Rescue' & 'Minefield' Gradient Background
09/22/14 12:42 AM
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They could feed the bits of the horizontal counter (these are rotated games) directly into a resistor ladder DAC to produce the gradient. For the game that has blue on one half of the screen and brown on the other half, just use the high bit of the counter to switch between two resistor ladders. In either case, no additional PROMs would be needed.
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