Playstation rgb to hdmi for Amiga

[BozzerBigD]

The lag is minimal on the Mega Drive however PAL Sonic The Hedgehog is laggy compared to the emulated Sonic Mega Collection version I play on the PS2 because of the hole NTSC 60hz vs PAL 50hz performance hit UK gamers had to suffer because the PAL version was never optimised and used the same code as the Japan and US versions!

[BozzerBigD]

Well a 17% slow down (including the music) was not an acceptable solution for PAL regions IMHO.

[BozzerBigD]

That isn't lag. It's also not due to optimization, trying to match the speed would have made it look jerky.

You're so wrong anyway! They could have optimised the game to run faster if they'd cared!

https://gizmodo.com/why-does-sonic-the-hedgehog-run-faster-in-america-1787504338

So what? Well, these systems run at different frequencies, which meant that the same game running at 30 frames-per-second in the US would output at 25 in the UK. Hence, one slow hedgehog.

Of course, this is an oversimplification. Many games were PAL-optimized to run normally—the first Sonic the Hedgehog just wasn’t one of them. Also, thanks to digital TV, almost none of this stuff matters anymore.

https://forums.sonicretro.org/index.php?threads/sonic-the-hedgehog-50hz-effect.35284/

As a retro programmer, I can see why games were hardly optimized for PAL back in the day. Too many things about the engine were locked to the frame rate, such as animation delays and physics constants. Adjusting such things would mean tweaking fractional numbers, which back then were always represented as fixed-point values, and had limited precision. The lack of precision would cause small errors between the two versions to accumulate over time, and eventually things would be noticeably out of sync. There are also problems caused by limitations in the engine... For exemple, if the engine can only scroll a maximum of 16 pixels per frame (due to how fast the map can be decoded and the amount of changes that can be made to the tile map), you can safely allow Sonic to move that fast. But on PAL, which has less frames per second, you'd need to move more pixels per frame to cover the same distance, and the scrolling system would simply not be able to keep up. In this case, supporting both PAL and NTSC would mean slowing down the NTSC version, which would be unacceptable.

EDIT: Well, I just played the first act of all 4 games and I have to say that the problem is not as bad as I remembered (the effect is much more pronounced in Sonic 1, due to the slower music constantly reminding us that everything is slower!). If I had only played the games in 50Hz, I'd probably have loved them just as much. And if I could only play them in 50Hz from now on, I'd still do it. It's still Sonic, just a bit slower. After a while you get used to it. =)

[BozzerBigD]

... so they sould have at least corrected the slow music on the PAL version even if the pixel movement per frame could not be increased for the PAL version.

[BozzerBigD]

Even more accurately explained on link below

https://www.reddit.com/r/SEGAGENESIS/comments/1uledp/why_is_the_pal_version_of_sonic_1_so_slow/cejbwqg

... Sonic 2, 3 etc were optimised to adjust for the slow down.