Unofficial Name: curBGColor
Memory Address: A017h
Length: 2 bytes
Stores the current background color for fixed-width text display routines.
Colors are represented as a 5-6-5 value (5 bits of red, 6 bits of green, 5 bits of blue.) For example, 0000001111100000b, or 03E0h, would be dark green. 1111100000011111b, or 0F81Fh, would be bright magenta.