Console | Reason | Test method |
NESRGB / SNES in 60Hz mode | Hsync period is not constant, causing some jitter to output clock. Some displays are sensitive to this and cannot properly lock to the signal (low receiver PLL bandwidth). | No known external test method. |
Neo Geo | 264-line output becomes 528 when linedoubled. MVS additionally outputs 59.18Hz refresh rate. | ModeLine "MVS_240p_x2" 26.810 720 736 798 858 480 489 495 528 -hsync -vsync |
PSX in 50Hz non-interlaced (288p) mode | 314-line output becomes 628 when linedoubled. | ModeLine "PSX_288p_x2" 27.000 720 732 796 864 576 581 587 628 -hsync -vsync |
PAL Saturn in 60Hz mode | 59.37 Hz vertical refresh rate | ModeLine "PAL_Saturn_240p_x2" 26.794 720 736 798 858 480 489 495 526 -hsync -vsync |
Console | Reason/symptom | Fix if any |
Neo Geo MV-1A and MV-1FZ | Significant hsync period variation during vblank | H-PLL pre and post coast -> 3, Hsync tolerance -> 10us (or higher) |
Jaguar in 50Hz non-interlaced (288p) mode | Output uses odd-odd field signaling since boot, OSSC can't lock properly | AV3 input (different sync processing chain) e.g. with Sync Strike |
PSX SCPH-100 (unverified) | No sync detected? |
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RGB modded French N64 (unverified) | Unstable sync regardless of settings? |
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