Mercurial > repos > blastem
diff vdp.c @ 680:4996369f1463
Some small synchronization improvements that do not seem to fix anything
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Sun, 04 Jan 2015 23:05:37 -0800 |
| parents | a7971650c04e |
| children | 7f96bd1cb1be |
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--- a/vdp.c Sun Jan 04 12:25:33 2015 -0800 +++ b/vdp.c Sun Jan 04 23:05:37 2015 -0800 @@ -1627,7 +1627,7 @@ if (!context->double_res) { context->framebuf = context->oddbuf; } - } + } context->cd &= 0x3C; } } else { @@ -1892,7 +1892,7 @@ return MCLKS_LINE * (lines - 1) + vdp_cycles_next_line(context); } -uint32_t vdp_cycles_to_frame_end(vdp_context * context) +uint32_t vdp_frame_end_line(vdp_context * context) { uint32_t frame_end; if (context->flags2 & FLAG2_REGION_PAL) { @@ -1908,7 +1908,18 @@ frame_end = NTSC_INACTIVE_START + 8; } } - return context->cycles + vdp_cycles_to_line(context, frame_end); + return frame_end; +} + +uint32_t vdp_cycles_to_frame_end(vdp_context * context) +{ + return context->cycles + vdp_cycles_to_line(context, vdp_frame_end_line(context)); +} + +uint8_t vdp_is_frame_over(vdp_context * context) +{ + uint32_t frame_end = vdp_frame_end_line(context); + return context->vcounter >= frame_end && context->vcounter < (frame_end + 8); } uint32_t vdp_next_hint(vdp_context * context)