POKE is a CBM BASIC command that puts numbers directly into memory.
The color of the screen border is held in memory address 53280 ($d020). The POKE below changes its value to 1, the number for white.
POKE 53280, 1
Because the Commodore 64 has a 16-bit address space, the smallest memory location you can POKE is , the largest you can POKE is 65535.
POKE 0, 1 POKE 65535, 1
- PEEK - look at a memory location.