Clear the screen
Function AddressDescription
CLSR E544Clear the screen

This routine sets up the screen line link table (0x00D9…0x00F2). It then clears the screen line by line using the CLRLN routine. Once that's completed, it then homes the cursor to the top left.

This is not an official documented Kernal entry point but is listed in the C64 ROM disassembly.

Last modified October 19, 2021: Add clsr & clrln (aa660a8)