Reply To: Higher V. Backporch Support for Optimal PSP In-Game Picture

[eatnumber1]

Sadly no, or at least it’s not straightforward. There’s no resolution switch as far as the OSSC (or your TV) is concerned.

However that said, I improved on this further since my last post, and 0.86 now has a dedicated sampling mode and an optimized line2x mode. So all you need to do is set “480p in sampler” to “PSP 480×272”.

It might be possible to count the size of the overscan area plus the letterbox and switch when the active region changes, but I’m not sure if that will be prone to false triggering in other places though.

Also FYI I looked into line4x. It’s not possible at all, ever on the OSSC (maybe the pro, idk). The HDMI transmitter cannot run at a fast enough clock speed. That said, I did some work to get the OSSC working better at clock speeds close to its theoretical max so that I can do line3x with a 3x vertical and 2x horizontal pixel clock (3x horizontal is also too fast). That work also got released with 0.86, although the Line3x mode is disabled because it’s not aspect ratio preserving. With those settings, it’s at the edge of what the OSSC can support, but it now works. With 2x horizontal, there’s enough room in the overscan area now that I can theoretically get to 3x horizontal without increasing clock speed by drawing into the overscan. The OSSC doesn’t support that kind of drawing mode yet though, so implementing that support is my next project. Once it works the output resolution should be 1440×816.