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r17774 Monday 10th September, 2012 at 06:34:53 UTC by Aaron Giles
Fixed invalid partial update calls on negative scanlines.
[src/mame/machine]megavdp.c

trunk/src/mame/machine/megavdp.c
r17773r17774
29712971
29722972      vdp->vdp_handle_scanline_callback(timer.machine(), param);
29732973
2974      timer.machine().primary_screen->update_partial(timer.machine().primary_screen->vpos()-1);
2974      int vpos = timer.machine().primary_screen->vpos();
2975      if (vpos > 0)
2976         timer.machine().primary_screen->update_partial(vpos-1);
29752977   }
29762978}
29772979

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