LEA SI,BUF
    MOV CS,SIZE
    CALL    ZAD2
    RET
ZAD2:   LODSW
    TEST    AX,1
    JZ  ODD
ZAD2L:  LOOP    ZAD2
    MOV AX,BX
    RET
ODD:    TEST    AX,AX
    JLE NEGATE
    ADD BX,AX
    JMP ZAD2L
NEGATE: NEG AX
    ADD BX,AX
    JMP ZAD2L
BUF DW  -2,2,3,-11,-4,2
SIZE    EQU ($-BUF)/TYPE BUF