asm change cmd background color

Question

I wrote the part that changes the text color, but I can\'t find a way to change the background color, this code is for tasm assembly:

model small
stack 256
.data         


        

Answer 1

In BIOS function 6, BH contains an 8-bit color. Its lower 4 bits specify the foreground color while the upper 4 bits specify the background color. Try, for example, mov bh, 14h instead of mov bh, 4h. It should start writing red on blue instead of red on black.