) Values Windows support procedure called with: BP = function 0001h Get ECB BX = socket number Return: ES:SI -> ECB or 0000h:0000h if none available 0002h Count Listen ECBs AX = BX = socket Return: CX = number of listen ECBs for socket (must be >= 2 for SPX to work) 0003h ??? 0004h Inform task switcher of ECB locations Note: registers other than those listed above are equal to the values when IPX was called Note: the support function will not be called if IPX is called with BX bit 15 set