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R. Belmont
Cuckoo for IGAvania
Reged: 09/21/03
Posts: 9716
Loc: ECV-197 The Orville
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Re: Stern Electronics 'Rescue' & 'Minefield' Gradient Background
09/23/14 05:05 PM
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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.

Yeah, on hardware of that era that's almost certainly how it worked.






Entire thread
Subject Posted by Posted on
* Stern Electronics 'Rescue' & 'Minefield' Gradient Background Pr3tty F1y 09/19/14 11:08 PM
. * Re: Stern Electronics 'Rescue' & 'Minefield' Gradient Background AWJ  09/22/14 12:42 AM
. * Re: Stern Electronics 'Rescue' & 'Minefield' Gradient Background R. Belmont  09/23/14 05:05 PM
. * Re: Stern Electronics 'Rescue' & 'Minefield' Gradient Background Pi  09/21/14 03:07 PM
. * Re: Stern Electronics 'Rescue' & 'Minefield' Gradient Background Anonymous  09/23/14 01:20 PM

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