D:\>debug
-a
178F:0100 mov ax,-5
178F:0103 neg ax
178F:0105
-t
AX=FFFBBX=0000CX=0000DX=0000SP=FFEEBP=0000SI=0000DI=0000
DS=178FES=178FSS=178FCS=178FIP=0103NV UP EI PL NZ NA PO NC
178F:0103 F7D8 NEGAX
-t
AX=0005BX=0000CX=0000DX=0000SP=FFEEBP=0000SI=0000DI=0000
DS=178FES=178FSS=178FCS=178FIP=0105NV UP EI PL NZ AC PE CY
178F:0105 0000 ADD[BX+SI],AL DS:0000=CD
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