Somewhat related, there was a Laptop that could quick switch between Windows and Linux by abusing ACPI Sleep Support and rewiring the return vectors for the wak

Somewhat related, there was a Laptop that could quick switch between Windows and Linux by abusing ACPI Sleep Support and rewiring the return vectors for the wake-up: https://www.youtube.com/watch?v=q5M0TwnkWUM https://www.youtube.com/watch?v=q5M0TwnkWUM (technical explanation starts at around 48:10) It's all kinds of "I don't approve of the idea, but I tip my hat to the engineer that came up with it for sheer ingenuity."