8-Bit Show And Tell | How to Determine Commodore 64 KERNAL Version #c64 #8bit #shorts @8_Bit | Uploaded January 2024 | Updated October 2024, 16 hours ago.
Both POKE 1024,1 and ?PEEK(65408) will return different results depending on what KERNAL revision you have in your Commodore 64.

A re-formatted excerpt from the long-form video "43-Year-Old INPUT Bug Fixed: From C64 to VIC-20" youtu.be/3WLbafg5Zjw