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mac128k PAL equations looking pretty good now.
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@ -157,23 +157,15 @@ module lag(simclk, n_res,
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| ~hsync & ~va3
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| ~hsync & va2
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| ~hsync & va1);
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// TODO FIXME: This is not a synthesizable PAL equation.
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// TODO FIXME: This isn't generating sound buffer accesses
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// during vertical blanking but it should be.
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// This is the correct conceptual equation:
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// s1 <= ~(~p0q2 | ~vclk)
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s1 <=
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~(~p0q2 // 0 for processor and 1 for video
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| ~vclk
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| ~vsync & hsync
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| ~vsync & viapb6 // vertical retrace only has sound cycles
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/* TODO INVESTIGATE: Line disabled because it drops out
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pulses we'd normally expect. */
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/* | ~viapb6 & hsync & ~va4 & ~va3 & ~va2 */
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| ~viapb6 & ~hsync & (~va4 | va4 & ~va3 & ~va2 |
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va4 & ~va3 & va2 & ~va1));
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| ~vsync & ~viapb6 & ~hsync & va4 & va3 & va2 & va1
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| ~viapb6 & ~hsync & ~va4
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| ~viapb6 & ~hsync & va4 & ~va3 & ~va2
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| ~viapb6 & ~hsync & va4 & ~va3 & va2 & ~va1);
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// viapb6 <=
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// ~(~hsync & resnyb // 1 indicates horizontal retrace (pseudo VA6)
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// | va1 & ~viapb6
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@ -212,7 +204,7 @@ module lag(simclk, n_res,
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reslin <= // try to generate line 370
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~(l28
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| ~vsync
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| hsync
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| ~hsync // HACKED previously hsync, but negated for testing.
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| viapb6
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| ~vclk);
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// N.B. Primary conceptual equation:
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@ -223,7 +215,7 @@ module lag(simclk, n_res,
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// with hsync.
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resnyb <=
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~(vclk // increment VA5:VA14 in 0F and 2B
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| viapb6
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| // viapb6 // TODO FIXME HACK PHASE
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| va1
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| va2
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| hsync & va4
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