Question

我正在尝试扩展此程序并允许用户使用寄存器输入要放入矩阵的字符。无论输入如何，AL都会返回笑脸。我需要做些什么来使我能够在L2内使用更大的寄存器，即移动al，bufSize使用的寄存器太小。

我还有一个问题，可以将标签作为另一个程序内的跳转指令的目标

使用跳转指令如何编写它以仅使用一个循环？

所以在我的新代码中我使用了一个跳转指令而不是一个循环，但是当我在调试器中观察它时，它会让我想起很多循环，它是一回事吗？

TITLE Color Matrix（ClrMatrix.asm）

Comment !
Displays an  Character in all possible colors
!

INCLUDE Irvine32.inc

BUFFMAX = 128


.data
charPrompt  BYTE "Choose a letter: ",0
buffer  BYTE  BUFFMAX+1 DUP(0)
bufSize BYTE ?


.code
main PROC
    call ChooseCharacter
    call    GenerateMatrix

main ENDP

ChooseCharacter PROC

    pushad
    mov edx,OFFSET charPrompt
    call WriteString
    mov ecx,BUFFMAX
    mov edx,OFFSET buffer
    call ReadString
    mov bufSize,al
    call Crlf
    popad
    ret
ChooseCharacter ENDP


GenerateMatrix PROC
    call Clrscr
    mov  eax,0

    mov  ecx,16
L1: push ecx    ; vary the background colors

    mov  ecx,16
L2: call SetTextColor   ; vary the foreground colors
    push eax
    mov  al,bufSize
    call WriteChar
    pop  eax

    inc  al ; next foreground color
    loop L2

    sub  al,16  ; reset foreground color to zero
    add  al,16  ; select next background color
    call Crlf

    pop  ecx
    loop L1

    mov  eax,7
    call SetTextColor

    exit
GenerateMatrix ENDP

END main

Answer 1

工作代码：

TITLE Q16 Color Matrix              (ClrMatrix.asm)

Comment !
Author: Louis Krueger
date:4/17/2014
Displays a defined Character in all possible colors
!

INCLUDE Irvine32.inc


.data
charPrompt  BYTE "Choose a letter: ",0
Character   DWORD ?


.code
;========================================================
main PROC   ;Calls the procedures
;========================================================
    call ChooseCharacter
    call GenerateMatrix

main ENDP
;-----------------------------------------------------------------
ChooseCharacter PROC
;Takes user input character to use as charcter in print
;-----------------------------------------------------------------
    mov edx,OFFSET charPrompt
    call WriteString
    call ReadChar
    mov Character,eax
    call Crlf

    ret

ChooseCharacter ENDP

;-------------------------------------------------------------------
GenerateMatrix PROC
;-------------------------------------------------------------------
    call Clrscr
    mov  eax,0

    mov  ecx,16
L1: push ecx            ; loop for background colors

    mov  ecx,16
L2: call SetTextColor   ; nested loop for foreground colors
    push eax
    mov  eax,Character
    call WriteChar
    pop  eax

    inc  al         ; inc the foreground color
    loop L2

    sub  al,16      ; resets the forground for next iteration
    add  al,16      ; goes to the next background color
    call Crlf

    pop  ecx
    loop L1

    mov  eax,7
    call SetTextColor

    exit
GenerateMatrix ENDP

END main

使用寄存器和程序提示在ASSEMBLY中输入字母

1 个答案: