Int 2F Fn DB02  U - Wingo.com - Reset Callback Function Pointer            [U]

   AX = DB02h

Return: AX = 0000h
Desc:  the callback function is used for WINGO <-> WINSTART communication

See Also: AX=DB00h"WINGO",AX=DB01h"WINGO",AX=DB03h"WINGO",AX=DB04h"WINGO"

See Also: AX=DB05h"WINGO",AX=DB06h"WINGO"