sysio: minor improvements
sysio: minor improvements

russpowers/Nim,dom96/Nim,tulayang/Nim,tulayang/Nim,dom96/Nim,tulayang/Nim,russpowers/Nim,tulayang/Nim,dom96/Nim,dom96/Nim,tulayang/Nim,dom96/Nim,dom96/Nim,russpowers/Nim,russpowers/Nim,russpowers/Nim,dom96/Nim,russpowers/Nim,russpowers/Nim,tulayang/Nim