Reply To: Confused about how OSSC works with PS2

[Harrumph]

1. Yes that is pretty much correct. Example SNES (ntsc) has 262 lines total, 22 of those are blanking period, 240 is active video. However, the system can never display more than 224 lines of actual video (not strictly true actually, but for the sake of this argument). So it has 240-224 = 16 lines that would be expected to fall outside of the visible edge anyway. In general the term overscan refers to the behavior of the crt TV display, not the source. All TVs at the time had 5-10% overscan, for reasons not necessary to go through here. There are articles on wikipedia etc.

2. You can change the ”active” area. Those are the V.Active and H.Active settings. Adjusting them may cause non-standard output timings, so some displays will not accept them. If they do accept them, it can be used as a sort of zoom. E.g. many games/systems only have actual video on 224 of 240 lines (like I mentioned above), or 448 of 480 lines (480i games). So if you lower v.active from 240/480 to 224/448, on those games/systems the image will then go to the edge of your screen. But this is dependent also how your display does scaling. Remember to compensate with backporch if you alter the active value.

3. You need to set ”alternating” scanlines and at 100% strength for this approach to work. Some people find it emulates the look of interlace on crt pretty well, others don’t.