汇编（TASM）：以字节为单位打印某些位的总和

Question

我的目标是打印每个字节的第 0 位和第 3 位的总和。到目前为止，这是我的代码：

printLine macro line
    mov ah, 09
    mov dx, offset line
    int 21h
endm
;-----------------------------
readLine macro buffer
    mov ah, 0Ah
    mov dx, offset buffer
    int 21h
endm
;-----------------------------
getByteBitSum macro theByte
    mov al, byte ptr theByte
    mov cl, byte ptr theByte
    shr al, 3
    and al, 01
    and cl, 01
    add al, cl
endm
;-----------------------------
;-----------------------------
;-----------------------------
.model small
    ASSUME CS:code, DS:data, SS:stack
;-----------------------------
data segment para public 'DATA'
    message_1:
        db 'Enter a line'

    newLine:
        db 0Dh, 0Ah, '$'

    message_2:
        db 'You entered ',0Dh, 0Ah, '$'

    dataBuffer:
        db 20, 00, 20 dup (00)
data ends
;-----------------------------
code segment para public 'CODE'
    start:

    mov ax, seg data
    mov ds, ax

    printLine message_1

    readLine dataBuffer
    printLine newLine

    printLine message_2
    printLine newLine

    mov bx, 0000
    mov bl, byte ptr[dataBuffer + 1]
    mov word ptr [dataBuffer + bx + 3], 240Ah

    printLine dataBuffer + 2
    printLine newLine

    getByteBitSum [dataBuffer + 2]
    printLine newLine

    getByteBitSum [dataBuffer + 3]
    printLine newLine

    getByteBitSum [dataBuffer + 4]
    printLine newLine

    mov ah, 4ch
    int 21h
code ends
;-----------------------------
stack seg para stack 'STACK'
    dw 400h dup ('**')
stack ends
;-----------------------------
    end start

我得到的错误是：

GETBYTEBITSUM (1) Need right square bracket
GETBYTEBITSUM (2) Need right square bracket
GETBYTEBITSUM (1) Need right square bracket
GETBYTEBITSUM (2) Need right square bracket

我的猜测是我不太了解 buffer 及其偏移量是如何工作的。如果我的猜想是正确的，谁能用这个例子简单解释一下它发生了什么？

顺便说一句：截至目前，我只尝试打印前 3 个字节，而不是整个输入行。

谢谢。

Answer 1

getByteBitSum [dataBuffer + 2]

宏扩展对嵌入的 space 个字符有困难！
通过写作解决它：

getByteBitSum [dataBuffer+2]   ;No more embedded spaces!

汇编（TASM）：以字节为单位打印某些位的总和

Assembly (TASM): print the sum of certain bits in bytes

assembly

buffer

offset

x86-16

tasm