I set the video mode to AL=00h , it's a text mode with 40x25 char , 16 colors , and 8 pages.
40x25 should mean printing 1000 character will make the screen full of the character, but to my surprise it doesn't , i need to print 1024 character to make the screen full of the character .
But why ? can someone explain this to me ? why does 40x25 char screen contains 1024 character ?
Edit : After posting this question , i do some testing and found something interesting , to fill first line with character , i need to print 40 times , to fill 2nd line , i need to print 81 times , to fill 3rd line , i need to print 122 time , to fill 4th line , i need to print 163 time , why do i need to print extra 1 time for every new line ?
Edit 2 : i counted the character on screen manually like a mad man , there is exactly 1000 character , but i printed 1024 times , where did the other 24 character go ?!?1
here are my code
ORG 100h
mov ah,00h ; ah=00 mode
mov al,00 ; text mode. 40x25. 16 colors.8 pages
int 10h
mov ah,09h ; ah=09 mode
mov bh,00 ; page 0
mov al,'A' ; character to display
mov cx,1024 ; print the character 1024 times
mov bl,1fh ; high-intensity white on blue
int 10h
RET
