IIRC you could do something similar with Action Replay, you would load into the Action Replay UI, swap out the disc and then boot into a pirated game

ps2 slim also had the disc swap trick

If you had the action replay cart, you could just leave it in and it would bypass the check altogether. I played burnt discs aplenty on my Saturn.

Simply not true. I own several Saturns and action replays since the 90's.

The Pseudo Saturn Action reply hack to circumvent disc checks was only within recent years released.

Weird. I definitely had a bog-standard Action Replay and most certainly played burnt discs. Perhaps my console was hardmodded, without my knowledge.

(Also, someone had downvoted you, which I disagree with completely. If I'm wrong, I'm wrong. So, here's an upvote to balance it out.)

Ha yes I remember this. There was a physical mod that allowed the disk door to be opened without the ps1 noticing so you could switch disks after the verification

Purchasing Verbatim purple bottom CDR blanks to copy original PSX games was my introduction to piracy. I was quite young. Those first gen Playstations with the port in the back were amazing easy to mod with the action replay or just the swap trick.

I also jumped on the XBMC and Xecutor modchip for the original Xbox when that came out. Another mind blowing time in computer gaming.