struc SwVersion
 svsAPIMajor            dw ?    ; Protocol supported major version
 svsAPIMinor            dw ?    ; Protocol supported minor version
 svsProductMajor        dw ?    ; Task switcher's major version
 svsProductMinor        dw ?    ; Task switcher's minor version
 svsSwitcherID          dw ?    ; Task switcher identifier
 svsFlags               dw ?    ; Operation flags (bit 0: switcher active)
 svsName                dd ?    ; Points to task switcher name (ASCIIZ)
 svsPrevSwitcher        dd ?    ; Previous task switcher's entry address
ends                            ; = 20d bytes