Video Interface: Difference between revisions
→0x0440 0020 - VI_H_SYNC_LEAP: my best deduction as to what LEAP is for
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(→0x0440 0020 - VI_H_SYNC_LEAP: my best deduction as to what LEAP is for) |
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| 11-0 | LEAP_B[11:0] | NTSC: Identical to H_SYNC width. PAL: <code>0xC6F</code>
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'''Extra Details:'''
: LEAP_n specifies an alternate scanline length for the one scanline during vsync. Values larger than H_SYNC specify the length of the second scanline of vsync. Values smaller than H_SYNC specify the length of the first scanline of vsync and have a variety of undesired side effects, such as skipping one hsync entirely or leaving csync erroneously high for one whole scanline
: The default PAL values of LEAP, LEAP_A, and LEAP_B appear to be responsible for adding PAL's nominal "one extra chroma period per 625 scanlines emitted".
==== <span style="display:none;">0x0440 0024 - VI_H_VIDEO ====
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