我得到了显示字符显示在 Boot 。现在我如何添加writeHexBytes，然后显示在屏幕上使用writeHexByte在一个循环，并writeHexWord。

• writeHexByte需要一个8位寄存器，通过调用convertHexNibble并使用writeChar显示该寄存器
• writeHexWord需要16位寄存器或内存参数，并通过调用writeHexByte显示每个字节

所以在写入字符后，它需要显示宏writeChar实现的机器码。并在循环中使用writeHexBytes显示

已尝试代码

# Macro definition
.macro convertHexNibble register
    cmpb $10, \register
    jl 1f
    # process here is >=10
    add $0x37, \register
    jmp 2f  
    # process here is <=10
    1:
    add $0x30, \register    
    2:
    # expect the register to now be the ascii code
.endm

#.macro writeHexByte register
#convert
#.endm

.macro displayChar character color
mov $0x09, %ah
mov \character, %al  
mov $0x00, %bh 
mov \color, %bl 
mov $0x01, %cx
int $0x10
.endm

#set defualts values to move cursor off screen
.macro moveCursor row = $0xff column = $0xff
mov $0x02, %ah # ah = 02h moves the cursor row 2 col 2
mov $0x00, %bh # bh = 0 page
mov $0x02, %dh 
mov $0x02, %dl # dl=1
int $0x10
.endm

.macro sumArray array number result

# assume array is an array of bytes
#therefore the accumulator is just %al (8bits)
      mov $\number, %cx  # AX will serve as a counter for 
                     # the number of words left to be summed 
      mov $0, %ax  # BX will store the sum
      mov \array, %bx  # CX will point to the current 
                     # element to be summed
top:  add (%bx), %cx
      inc %bx  # move pointer to next element
      dec %ax  # decrement counter
      jnz top  # if counter not 0, then loop again
done: mov %ax, \result  # done, store result in "array"

.endm

# The main boot processing code
.code16
.text
.global _start
_start:

mov $06, %al
convertHexNibble %al
displayChar %al, $0xe3
moveCursor %ah
mov $0x0A, %al
convertHexNibble %al
displayChar %al, $0xe3

sumArray $x 4 sum

# writtenHexWord $sum

# move Cursor off screen invisble
moveCursor

cli # clear interrupts
hlt
x: .byte 1, 5, 2, 10    
#   char x[] = {1, 5, 2, 10};      
sum: .byte 0
# char sum = 0;

. = _start + 510
.byte 0x55
.byte 0xAA