China DOS Union

```@more /e +1 "%~f0"|debug>nul&goto:eof
a100
mov al,12
int 10 ;Graphic, 640 * 480, 16
mov ah,c ;Function number to write pixels, default bx=0, which is page number
mov dx,1e1 ;Initial value: row number
mov al,10 ;Initial value: pixel color value (0 - f)
dec dx ;--------10b
test al,al
jnz 112
mov al,10 ;Color cycle
dec al ;--------112
mov cx,280 ;Initial value: column number
int 10 ;--------117
loop 117
test dx,dx
jnz 10b
int 20

g
q
```

It's too powerful for me, add points for encouragement!!!

I can't understand, so add points

Really admire it. Just a small question, where did you learn all these knowledge? If I also want to learn this debug, how should I study?

Originally posted by heheguai at 2009-7-13 10:51 AM:
Really admire, just a small question, where did you learn these knowledge? If I also want to learn this debug, how should I learn?

Read books on 8086 assembly

"Programming in 32-bit Assembly Language under Windows Environment (2nd Edition) by Luo Yunbin" Complete High-Definition PDF Edition.pdf
I read the beginning a bit, it's good. Recommendation

Fortunately, I was able to get online today! I didn't miss out on something good.
It seems like I can write special effects now!

s11ss Can you explain the operations in this regard in detail?
Because the number systems are different, it's more difficult for students who haven't been exposed to this to understand.

Just messed around a bit earlier, only feeling that the column numbering is - the number of columns, and the row numbering is - the number of rows

@more /e +1 "%~f0"|debug>nul&goto:eof

a100

mov al,12

int 10                ;Graphics, 640 * 480, 16

mov ah,c         ;Function number to write pixels, default bx=0, that is, page number

mov dx,150        ;Initial value: row number                 (Determines how many rows)

mov al,10        ;Initial value: pixel color value (0 - f)

dec dx                ;--------10b

test al,al

jnz 112

mov al,05        ;Color cycle                        (Changed randomly to 05 here)

dec al                ;--------112

mov cx,100        ;Initial value: column number                 (Determines how many columns)

int 10                ;--------117

loop 117

test dx,dx

jnz 10b

int 20



g

q

Also messed around a bit, changed the subsequent loop 117 to 101, and then it became a small dot that kept flashing until the end

[ Last edited by 523066680 on 2009-7-13 at 21:46 ]

s11ss Can you explain the operations in this regard in detail?

1. First set the graphics mode
2. Write pixels
(1) Write row by row from bottom to top, exit when the row number = 0
(2) For each row, write column by column from right to left
(3) For each row, the pixel colors are the same; different rows have different colors, cycling from f to 0. (For which value corresponds to what color, please check color /?)

Friend's written VGA graphics mode access (hint version) (1) http://huangxiangkui.spaces.live.com/blog/cns!1A2CBFE8EE1DCCA3!126.entry

The debug has been deleted by me. Unfortunately, it can't run.

Now I have motivation to learn assembly!

Does it support paragraph breaking?

?