Как в Debug-отладчик на Assambler ввести отрицательные числа?

.intel_syntax noprefix
.global _start

SYS_exit   = 60
SYS_write  = 1

.data
    
    array:          .byte  109, 2, -78, 117, -120, 79, 115, -9, -3, 91
    array_end:
    str:            .zero   10
    newlinechar:    .byte   '\n'

.text
    
    exit:
        mov     rax,    SYS_exit
        mov     edi,    0
        syscall
    
    print:
        mov     rsi,    offset newlinechar
        mov     rcx,    10
        
        1:
            mov     rdx,    0
            div     rcx
            add     rdx,    0x30
            dec     rsi                             # buffer
            mov     byte ptr [rsi], dl
            cmp     rax,    0
            jne     1b
            
        mov     rax,    SYS_write
        mov     rdi,    1                           # stdout
        mov     rdx,    offset newlinechar + 1
        sub     rdx,    rsi                         # length
        syscall
        ret
    
    _start:
        mov     rcx,    array_end - array
        mov     rsi,    offset array
        
        1:
            mov     dl,     byte ptr [rsi + rcx - 1]
            test    dl,     dl                      # мяско
            cmovs   rdx,    rdi                     # мяско
            add     rax,    rdx
            dec     rcx
            jne     1b
        
        call    print
        jmp     exit

$ as possum.S -o possum.o && ld possum.o -o possum && ./possum
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