Well, even though the PS1 was released well before any widescreen CRT, it was more than capable of producing a widescreen capable image.
How? Well, how do we achieve most things? Fuckery.
Metal Gear Solid, did NOT support widescreen resolutions. But that didn’t mean it didn’t produce one at certain points in the game… like this exact time.
How? In two ways… Well the widescreen PS1 games weren’t actually widescreen, they squashed an image into 4:3 which would then be stretched onto a 16:9 (or similar) display. Have a fairly grainy horizontal quality, but it worked.
Second would be to ‘pulse’ the horizontal oscillator by messing with the HSYNC clock power.
But the PS1 couldn’t output a command signal or other signal metadata like modern video. So how did they manage THIS?!
You guessed it. More fuckery.