设在内存中首地址为BLOCK的区域存有一批数据：61H，84H，93H，0C4H，17H，0FFH，52H，2AH。分别按下列要求编写汇编语言程序： (1) 视该批数据为8位无符号数，采用冒泡法将其按升序排序； (2) 视该批数据为8位有符号数，采用冒泡法将其按升序排序。

(1) 冒泡排序（8位无符号数）:

MOV CX, 8
LEA SI, BLOCK
AGAIN:
MOV BX, CX
DEC BX
LEA DI, BLOCK
NEXT:
MOV AL, [SI]
CMP AL, [SI+BX]
JAE SKIP
XCHG AL, [SI+BX]
MOV [SI], AL
SKIP:
ADD SI, 1
LOOP NEXT
DEC CX
JNZ AGAIN

(2) 冒泡排序（8位有符号数）:

MOV CX, 8
LEA SI, BLOCK
AGAIN:
MOV BX, CX
DEC BX
LEA DI, BLOCK
NEXT:
MOV AL, [SI]
CBW
CMP AX, [SI+BX]
JAE SKIP
XCHG AL, [SI+BX]
MOV [SI], AL
SKIP:
ADD SI, 1
LOOP NEXT
DEC CX
JNZ AGAIN